SUPPLEMENTARY INFORMATION

Size: px
Start display at page:

Download "SUPPLEMENTARY INFORMATION"

Transcription

1 SUPPLEMENTARY INFORMATION Facile Synthesis of High Quality Graphene Nanoribbons Liying Jiao, Xinran Wang, Georgi Diankov, Hailiang Wang & Hongjie Dai* Supplementary Information 1. Photograph of graphene nanoribbon solution. 2. Height and width distribution of the obtained nanoribbons. 3. More AFM and TEM images of nanoribbons. 4. Raman spectra, XPS data and SEM images of pristine, oxidized and unzipped multiwalled carbon nanotubes. 5. Optimization of the unzipping process. 6. Comparison of the averaged I D /I G ratio of bi-layer graphene nanoribbons made by different methods. 7. Room temperature transport measurement of bi- and tri-layer nanoribbons and the comparison of resistivity of bi-layer nanoribbons made by different methods. nature nanotechnology 1

2 supplementary information 1. Photograph of graphene nanoribbon solution. Figure S1 Photograph of our final product, graphene nanoribbons in a polymer PmPV/DCE solution. Note the yellow color mostly was due to the color of PmPV. 2. Height and width distribution of the obtained nanoribbons. Figure S2 a and b, Height and width distribution of nanoribbons made by our new method of unzipping carbon nanotubes, respectively. The nanoribbons are mostly 1-3 layered based on the height data considering the PmPV residues on both sides of the ribbon (removal of polymer coating residue would reduce the height of ribbons measured by AFM, as shown in ref. 3 cited in the main text). 3. More AFM and TEM images of nanoribbons. 2 nature nanotechnology

3 supplementary information Figure S3 a, An AFM image of unzipped multiwalled carbon nanotubes deposited on SiO 2 /Si substrate. b, A zoom-in image of a part in a. The heights and widths of these two nanoribbons were 1.4 nm, 10 nm and 1.5 nm, 16 nm, from left to right. Figure S4 TEM images of nanoribbons with different widths. a, W ~15 nm, b, W ~17 nm. 4. Raman spectra, XPS data and SEM images of pristine, oxidized and unzipped multiwalled carbon nanotubes. We collected Raman data of pristine, calcined multiwalled carbon nanotubes and unzipped products in bulk. The samples were made by drop-drying the pristine, calcined and unzipped nanotubes dispersed in DCE onto SiO 2 /Si substrates to form nature nanotechnology 3

4 supplementary information thick films. All the spectra were taken with a 633 nm He-Ne laser excitation at ~1 mw for 10 s. The I D /I G ratios of these three samples were 0.20, 0.22 and 0.16, respectively (Fig. S5). After the gas-phase calcination step, the I D /I G of nanotubes did not increase, which indicated the oxidation was very mild and did not introduce new defects. The I D /I G of the unzipped products was much lower than those of bulk nanoribbons (I D /I G >1) made by unzipping in solution 1, 2 and CVD growth 3, 4, indicated higher quality of our nanoribbons. SEM images of pristine, calcined and unzipped multiwalled carbon nanotubes were taken by depositing these materials on Si substrates. No obvious difference was observed in SEM images of pristine (Fig. S7 (a)) and calcined (Fig. S7 (b)) nanotubes. Fig. S7 (c) shows the SEM image of sonicated products. The image brightness of nanoribbons and remaining nanotubes appeared obviously different. Nanoribbons (indicated by arrows) were darker than nanotubes under SEM. The inset of Fig. S7 (c) shows a nanoribbon with buckling. The percentage of nanoribbons was ~60%, which is consistent with AFM measurements. These SEM images also indicated that nanotubes were unzipped in the sonication process. Figure S5 Raman spectra of the pristine and oxidized multiwalled carbon nanotubes, 4 nature nanotechnology

5 supplementary information and the unzipped products. Figure S6 (a) XPS spectra of pristine and 500 C calcined multiwalled carbon nanotubes. The O1s peaks were very weak in both samples. (b) XPS spectra of C1s peaks of pristine and mildly oxidized nanotubes. Both peaks are single symmetric peak at ev, characteristic of sp 2 carbon. These data indicated that the 500 o C calcination was very mild without introducing many new defects. Figure S7 SEM images of pristine (a), calcined (b) and unzipped (c) multiwalled carbon nanotubes. Insets, high magnification images of tubes and nanoribbons respectively. Little difference was seen between pristine and calcined nanotubes in (a) and (b). Nanoribbons appears as dark lines in (c), which was only observed after nature nanotechnology 5

6 supplementary information sonicating calcined carbon nanotubes, suggesting unzipping occurred in the sonication step. 5. Optimization of the unzipping processes. Our method of nanoribbon formation was a simple two-step process and both steps were critical. The pits introduced by calcination made it possible to unzip the nanotubes by mechanical breaking in the sonication step. The temperature of calcination was related to the activation energies for pits growth 5 and therefore, determined the yield and quality of the obtained nanoribbons. We found 500 o C was the optimized temperature for the production of nanoribbons at a good yield. Next, we tested the sonication conditions. We sonicated the calcined nanotubes in DCE for different durations, briefly centrifuged the solution at low speed (15,000 r.p.m.) to remove the aggregates without losing many nanoribbons and then deposited the supernatant onto SiO 2 /Si substrates. The percentages of nanoribbons were < 10%, ~30% and ~40% after sonication for 0.5, 1, and 2 hrs, respectively (Fig.S8). The obvious dependence of the percentage of nanoribbons on sonication time indicated that sonication played an important role in the unzipping process. Even longer sonication degraded the quality of nanoribbons as evidenced by the increase of resistivity after sonicating for 2 hrs. We also tried other solvent and surfactants and found that DCE and PmPV were the best combination for the production of nanoribbons. To obtain higher percentage of nanoribbons, we used ultracentrifuge to further separate nanotubes from nanoribbons. The percentage of nanoribbons made by sonicating for 1 hr increased to ~60% after centrifuging at 40,000 r.p.m for 2 hrs (Fig. 6 nature nanotechnology

7 supplementary information S9). Thus, we concluded the optimized steps for the production of nanoribbons with both high yield and quality of nanoribbons: First, multiwalled carbon nanotubes were calcined in air at 500 o C for 2 hrs. After that, the calcined nanotubes were sonication for 1 hr in PmPV/DCE solution and then ultracentrifuged at 40,000 r.p.m. for 2 hrs. We also used CVD-grown multiwalled carbon nanotubes as starting materials. Some nanotubes were unzipped but the yield was low (Fig. S10) due to the low quality of nanotubes used. Figure S8 AFM images of unzipped products after sonicating for different time. a-c, 0.5, 1 and 2 hrs, respectively. nature nanotechnology 7

8 supplementary information Figure S9 AFM images of unzipped products after ultracentrifuging at different speed and time. a, 20,000 r.p.m for 1 hr. b, 30,000 r.p.m. for 1 hr. c, 40,000 r.p.m for 1 hr. d, 40,000 r.p.m. for 2 hrs. Figure S10 Unzipped CVD-grown multiwalled carbon nanotubes (made by the method reported in ref. 6). The arrow indicated a nanoribbon from a partially unzipped nanotube. 8 nature nanotechnology

9 supplementary information 6. Comparison of the averaged I D /I G of bi-layer nanoribbons made by different methods. We used the averaged I D /I G to compare the quality of our nanoribbons with nanoribbons made by various methods. Except for a few publications from our group, there were no reported Raman data of individual bi-layer nanoribbons with widths of ~20 nm. We compared the I D /I G of individual bi-layer nanoribbons made by different methods used in our group. Fig. S11 showed the Raman spectrum of a typical 20-nm-wide bi-layer nanoribbon made by lithographic patterning with an I D /I G of ~ Besides lithographic patterning, we can also produce bi-layer nanoribbons by plasma unzipping carbon nanotubes 8. The average I D /I G of ~ 20 nm wide bi-layer nanoribbons made by plasma unzipping was ~0.5. Figure S11 A typical Raman spectrum of a 20-nm-wide bi-layer nanoribbon made by lithographic patterning, showing an I D /I G of ~ Room temperature transport measurement of bi- and trilayer nanoribbons and nature nanotechnology 9

10 supplementary information the comparison of resistivity of bi-layer nanoribbons made by different methods. Figure S12 shows the typical I ds -V gs curves of bi- and tri-layer nanoribbons at room temperature in vacuum after the electrical annealing. Most of the obtained nanoribbon devices showed clear Dirac points at around 0 V after electrical annealing. We compared the room temperature resistivity of bi-layer nanoribbons with 10~30 nm widths made by different methods, including lithographic patterning 9, sonochemical 10 method and plasma unzipping 8. Figure S13 shows the typical I ds -V gs curves of bi-layer nanoribbons made by lithographic patterning 7. All the data points included in Fig. 4D were taken from literature or from data of our group. Figure S12 a, I ds -V gs curve of a 12-nm-wide bi-layer nanoribbon after electrical annealing. b, I ds -V gs curve of a 20-nm-wide tri-layer nanoribbon after electrical annealing. V ds = 100 mv, pressure: ~10-6 Torr. 10 nature nanotechnology

11 supplementary information Figure S 13 I ds -V gs curves of two bi-layer nanoribbons made by lithographic patterning, V ds = 1 mv. a, W ~27 nm, L ~310 nm. b, W ~29 nm, L ~480 nm. nature nanotechnology 11

12 supplementary information References 1. Kosynkin, D. V. et al. Longitudinal unzipping of carbon nanotubes to form graphene nanoribbons. Nature 458, (2009). 2. Cano-Marquez, A. G. et al. Ex-MWNTs: Graphene sheets and ribbons produced by lithium intercalation and exfoliation of carbon nanotubes. Nano Lett. 9, (2009). 3. Campos-Delgado, J. et al. Bulk production of a new form of sp 2 carbon: Crystalline graphene nanoribbons. Nano Lett. 8, (2008). 4. Wei, D. C. et al. Scalable synthesis of few-layer graphene ribbons with controlled morphologies by a template method and their applications in nanoelectromechanical switches. J. Am. Chem. Soc. 131, (2009). 5. Stevens, F., Kolodny, L. A. & Beebe, T. P. Kinetics of graphite oxidation: Monolayer and multilayer etch pits in HOPG studied by STM. J. Phys. Chem. B 102, (1998). 6. Zhang, X.B., et al. Spinning and processing continuous yarns from 4-inch wafer scale super-aligned carbon nanotube arrays. Adv. Mater., 18, (2006). 7. Wang, X.R., et al. unpublished data. 8. Jiao, L. Y., Zhang, L., Wang, X. R., Diankov, G. & Dai, H. J. Narrow graphene nanoribbons from carbon nanotubes. Nature 458, (2009). 9. Lin, Y. M.& Avouris, P. Strong suppression of electrical noise in bilayer graphene nanodevices. Nano Lett. 8, (2008). 10. Li, X. L. et al. Chemically derived, ultrasmooth graphene nanoribbon semiconductors. Science 319, (2008). 12 nature nanotechnology

Supplementary Figure S1. AFM images of GraNRs grown with standard growth process. Each of these pictures show GraNRs prepared independently,

Supplementary Figure S1. AFM images of GraNRs grown with standard growth process. Each of these pictures show GraNRs prepared independently, Supplementary Figure S1. AFM images of GraNRs grown with standard growth process. Each of these pictures show GraNRs prepared independently, suggesting that the results is reproducible. Supplementary Figure

More information

Supporting Online Material for

Supporting Online Material for www.sciencemag.org/cgi/content/full/324/5928/768/dc1 Supporting Online Material for N-Doping of Graphene Through Electrothermal Reactions with Ammonia Xinran Wang, Xiaolin Li, Li Zhang, Youngki Yoon, Peter

More information

A. Optimizing the growth conditions of large-scale graphene films

A. Optimizing the growth conditions of large-scale graphene films 1 A. Optimizing the growth conditions of large-scale graphene films Figure S1. Optical microscope images of graphene films transferred on 300 nm SiO 2 /Si substrates. a, Images of the graphene films grown

More information

performance electrocatalytic or electrochemical devices. Nanocrystals grown on graphene could have

performance electrocatalytic or electrochemical devices. Nanocrystals grown on graphene could have Nanocrystal Growth on Graphene with Various Degrees of Oxidation Hailiang Wang, Joshua Tucker Robinson, Georgi Diankov, and Hongjie Dai * Department of Chemistry and Laboratory for Advanced Materials,

More information

NiCl2 Solution concentration. Etching Duration. Aspect ratio. Experiment Atmosphere Temperature. Length(µm) Width (nm) Ar:H2=9:1, 150Pa

NiCl2 Solution concentration. Etching Duration. Aspect ratio. Experiment Atmosphere Temperature. Length(µm) Width (nm) Ar:H2=9:1, 150Pa Experiment Atmosphere Temperature #1 # 2 # 3 # 4 # 5 # 6 # 7 # 8 # 9 # 10 Ar:H2=9:1, 150Pa Ar:H2=9:1, 150Pa Ar:H2=9:1, 150Pa Ar:H2=9:1, 150Pa Ar:H2=9:1, 150Pa Ar:H2=9:1, 150Pa Ar:H2=9:1, 150Pa Ar:H2=9:1,

More information

SUPPLEMENTARY INFORMATION

SUPPLEMENTARY INFORMATION SUPPLEMENTARY INFORMATION An Oxygen Reduction Electrocatalyst Based on Carbon Nanotube- Nanographene Complexes Yanguang Li, Wu Zhou, Hailiang Wang, Liming Xie, Yongye Liang, Fei Wei, Juan-Carlos Idrobo,

More information

Solvothermal Reduction of Chemically Exfoliated Graphene Sheets

Solvothermal Reduction of Chemically Exfoliated Graphene Sheets Solvothermal Reduction of Chemically Exfoliated Graphene Sheets Hailiang Wang, Joshua Tucker Robinson, Xiaolin Li, and Hongjie Dai* Department of Chemistry and Laboratory for Advanced Materials, Stanford

More information

Supplementary Information for. Origin of New Broad Raman D and G Peaks in Annealed Graphene

Supplementary Information for. Origin of New Broad Raman D and G Peaks in Annealed Graphene Supplementary Information for Origin of New Broad Raman D and G Peaks in Annealed Graphene Jinpyo Hong, Min Kyu Park, Eun Jung Lee, DaeEung Lee, Dong Seok Hwang and Sunmin Ryu* Department of Applied Chemistry,

More information

SUPPLEMENTARY INFORMATION

SUPPLEMENTARY INFORMATION SUPPLEMENTARY INFORMATION DOI: 10.1038/NNANO.2011.138 Graphene Nanoribbons with Smooth Edges as Quantum Wires Xinran Wang, Yijian Ouyang, Liying Jiao, Hailiang Wang, Liming Xie, Justin Wu, Jing Guo, and

More information

Supporting Information Available:

Supporting Information Available: Supporting Information Available: Photoresponsive and Gas Sensing Field-Effect Transistors based on Multilayer WS 2 Nanoflakes Nengjie Huo 1, Shengxue Yang 1, Zhongming Wei 2, Shu-Shen Li 1, Jian-Bai Xia

More information

High Quality Thin Graphene Films from Fast. Research Center for Applied Sciences, Academia Sinica, Taipei, 11529, Taiwan

High Quality Thin Graphene Films from Fast. Research Center for Applied Sciences, Academia Sinica, Taipei, 11529, Taiwan Supporting Materials High Quality Thin Graphene Films from Fast Electrochemical Exfoliation Ching-Yuan Su, Ang-Yu Lu #, Yanping Xu, Fu-Rong Chen #, Andrei N. Khlobystov $ and Lain-Jong Li * Research Center

More information

A new method of growing graphene on Cu by hydrogen etching

A new method of growing graphene on Cu by hydrogen etching A new method of growing graphene on Cu by hydrogen etching Linjie zhan version 6, 2015.05.12--2015.05.24 CVD graphene Hydrogen etching Anisotropic Copper-catalyzed Highly anisotropic hydrogen etching method

More information

Supplementary Figure S1. AFM characterizations and topographical defects of h- BN films on silica substrates. (a) (c) show the AFM height

Supplementary Figure S1. AFM characterizations and topographical defects of h- BN films on silica substrates. (a) (c) show the AFM height Supplementary Figure S1. AFM characterizations and topographical defects of h- BN films on silica substrates. (a) (c) show the AFM height topographies of h-bn film in a size of ~1.5µm 1.5µm, 30µm 30µm

More information

CVD growth of Graphene. SPE ACCE presentation Carter Kittrell James M. Tour group September 9 to 11, 2014

CVD growth of Graphene. SPE ACCE presentation Carter Kittrell James M. Tour group September 9 to 11, 2014 CVD growth of Graphene SPE ACCE presentation Carter Kittrell James M. Tour group September 9 to 11, 2014 Graphene zigzag armchair History 1500: Pencil-Is it made of lead? 1789: Graphite 1987: The first

More information

Graphene Fundamentals and Emergent Applications

Graphene Fundamentals and Emergent Applications Graphene Fundamentals and Emergent Applications Jamie H. Warner Department of Materials University of Oxford Oxford, UK Franziska Schaffel Department of Materials University of Oxford Oxford, UK Alicja

More information

Solution-processable graphene nanomeshes with controlled

Solution-processable graphene nanomeshes with controlled Supporting online materials for Solution-processable graphene nanomeshes with controlled pore structures Xiluan Wang, 1 Liying Jiao, 1 Kaixuan Sheng, 1 Chun Li, 1 Liming Dai 2, * & Gaoquan Shi 1, * 1 Department

More information

Supplementary Information. for. Controlled Scalable Synthesis of Uniform, High-Quality Monolayer and Fewlayer

Supplementary Information. for. Controlled Scalable Synthesis of Uniform, High-Quality Monolayer and Fewlayer Supplementary Information for Controlled Scalable Synthesis of Uniform, High-Quality Monolayer and Fewlayer MoS 2 Films Yifei Yu 1, Chun Li 1, Yi Liu 3, Liqin Su 4, Yong Zhang 4, Linyou Cao 1,2 * 1 Department

More information

SUPPLEMENTARY INFORMATION. Observation of tunable electrical bandgap in large-area twisted bilayer graphene synthesized by chemical vapor deposition

SUPPLEMENTARY INFORMATION. Observation of tunable electrical bandgap in large-area twisted bilayer graphene synthesized by chemical vapor deposition SUPPLEMENTARY INFORMATION Observation of tunable electrical bandgap in large-area twisted bilayer graphene synthesized by chemical vapor deposition Jing-Bo Liu 1 *, Ping-Jian Li 1 *, Yuan-Fu Chen 1, Ze-Gao

More information

Layer-modulated synthesis of uniform tungsten disulfide nanosheet using gas-phase precursors.

Layer-modulated synthesis of uniform tungsten disulfide nanosheet using gas-phase precursors. Layer-modulated synthesis of uniform tungsten disulfide nanosheet using gas-phase precursors. Jusang Park * Hyungjun Kim School of Electrical and Electronics Engineering, Yonsei University, 262 Seongsanno,

More information

Supplementary Figures Supplementary Figure 1

Supplementary Figures Supplementary Figure 1 Supplementary Figures Supplementary Figure 1 Optical images of graphene grains on Cu after Cu oxidation treatment at 200 for 1m 30s. Each sample was synthesized with different H 2 annealing time for (a)

More information

Nanostrukturphysik Übung 2 (Class 3&4)

Nanostrukturphysik Übung 2 (Class 3&4) Nanostrukturphysik Übung 2 (Class 3&4) Prof. Yong Lei & Dr. Yang Xu 2017.05.03 Fachgebiet 3D-Nanostrukturierung, Institut für Physik Contact: yong.lei@tu-ilmenau.de (3748), yang.xu@tuilmenau.de (4902)

More information

SUPPLEMENTARY INFORMATION

SUPPLEMENTARY INFORMATION Direct Visualization of Large-Area Graphene Domains and Boundaries by Optical Birefringency Dae Woo Kim 1,*, Yun Ho Kim 1,2,*, Hyeon Su Jeong 1, Hee-Tae Jung 1 * These authors contributed equally to this

More information

1-amino-9-octadecene, HAuCl 4, hexane, ethanol 55 o C, 16h AuSSs on GO

1-amino-9-octadecene, HAuCl 4, hexane, ethanol 55 o C, 16h AuSSs on GO Supplementary Figures GO Supplementary Figure S1 1-amino-9-octadecene, HAuCl 4, hexane, ethanol 55 o C, 16h AuSSs on GO Schematic illustration of synthesis of Au square sheets on graphene oxide sheets.

More information

Production of Graphite Chloride and Bromide Using Microwave Sparks

Production of Graphite Chloride and Bromide Using Microwave Sparks Supporting Information Production of Graphite Chloride and Bromide Using Microwave Sparks Jian Zheng, Hongtao Liu, Bin Wu, Chong-an Di, Yunlong Guo, Ti Wu, Gui Yu, Yunqi Liu, * and Daoben Zhu Key Laboratory

More information

Supplementary Figure 1 Dark-field optical images of as prepared PMMA-assisted transferred CVD graphene films on silicon substrates (a) and the one

Supplementary Figure 1 Dark-field optical images of as prepared PMMA-assisted transferred CVD graphene films on silicon substrates (a) and the one Supplementary Figure 1 Dark-field optical images of as prepared PMMA-assisted transferred CVD graphene films on silicon substrates (a) and the one after PBASE monolayer growth (b). 1 Supplementary Figure

More information

Supplementary Figure S1. AFM image and height profile of GO. (a) AFM image

Supplementary Figure S1. AFM image and height profile of GO. (a) AFM image Supplementary Figure S1. AFM image and height profile of GO. (a) AFM image and (b) height profile of GO obtained by spin-coating on silicon wafer, showing a typical thickness of ~1 nm. 1 Supplementary

More information

Hydrogenation of Single Walled Carbon Nanotubes

Hydrogenation of Single Walled Carbon Nanotubes Hydrogenation of Single Walled Carbon Nanotubes Anders Nilsson Stanford Synchrotron Radiation Laboratory (SSRL) and Stockholm University Coworkers and Ackowledgement A. Nikitin 1), H. Ogasawara 1), D.

More information

Supporting Information. Direct n- to p-type Channel Conversion in Monolayer/Few-Layer WS 2 Field-Effect Transistors by Atomic Nitrogen Treatment

Supporting Information. Direct n- to p-type Channel Conversion in Monolayer/Few-Layer WS 2 Field-Effect Transistors by Atomic Nitrogen Treatment Supporting Information Direct n- to p-type Channel Conversion in Monolayer/Few-Layer WS 2 Field-Effect Transistors by Atomic Nitrogen Treatment Baoshan Tang 1,2,, Zhi Gen Yu 3,, Li Huang 4, Jianwei Chai

More information

Wafer-scale fabrication of graphene

Wafer-scale fabrication of graphene Wafer-scale fabrication of graphene Sten Vollebregt, MSc Delft University of Technology, Delft Institute of Mircosystems and Nanotechnology Delft University of Technology Challenge the future Delft University

More information

SUPPLEMENTARY INFORMATION

SUPPLEMENTARY INFORMATION Effect of airborne contaminants on the wettability of supported graphene and graphite Zhiting Li 1,ǂ, Yongjin Wang 2, ǂ, Andrew Kozbial 2, Ganesh Shenoy 1, Feng Zhou 1, Rebecca McGinley 2, Patrick Ireland

More information

Formation of N-doped Graphene Nanoribbons via Chemical Unzipping

Formation of N-doped Graphene Nanoribbons via Chemical Unzipping SUPPORTING INFORMATION FILE FOR: Formation of N-doped Graphene Nanoribbons via Chemical Unzipping Rodolfo Cruz-Silva 1, Aaron Morelos-Gómez 3, Sofia Vega-Díaz 1, Ferdinando Tristán- López 1, Ana L. Elias

More information

Simultaneous Nitrogen Doping and Reduction of Graphene Oxide

Simultaneous Nitrogen Doping and Reduction of Graphene Oxide Published on Web 10/09/2009 Simultaneous Nitrogen Doping and Reduction of Graphene Oxide Xiaolin Li, Hailiang Wang, Joshua T. Robinson, Hernan Sanchez, Georgi Diankov, and Hongjie Dai* Department of Chemistry,

More information

Supplementary Information

Supplementary Information Supplementary Information Chemical and Bandgap Engineering in Monolayer Hexagonal Boron Nitride Kun Ba 1,, Wei Jiang 1,,Jingxin Cheng 2, Jingxian Bao 1, Ningning Xuan 1,Yangye Sun 1, Bing Liu 1, Aozhen

More information

Determination of quantitative structure property and structure process relationships for graphene production in water

Determination of quantitative structure property and structure process relationships for graphene production in water Electronic Supplementary Material Determination of quantitative structure property and structure process relationships for graphene production in water Thomas J. Nacken, Cornelia Damm, Haichen Xing, Andreas

More information

SUPPLEMENTARY INFORMATION

SUPPLEMENTARY INFORMATION Lateral heterojunctions within monolayer MoSe 2 -WSe 2 semiconductors Chunming Huang 1,#,*, Sanfeng Wu 1,#,*, Ana M. Sanchez 2,#,*, Jonathan J. P. Peters 2, Richard Beanland 2, Jason S. Ross 3, Pasqual

More information

Supporting Information

Supporting Information Electronic Supplementary Material (ESI) for ChemComm. This journal is The Royal Society of Chemistry 2014 Supporting Information Controllable Atmospheric Pressure Growth of Mono-layer, Bi-layer and Tri-layer

More information

Supplementary Figure 1 Experimental setup for crystal growth. Schematic drawing of the experimental setup for C 8 -BTBT crystal growth.

Supplementary Figure 1 Experimental setup for crystal growth. Schematic drawing of the experimental setup for C 8 -BTBT crystal growth. Supplementary Figure 1 Experimental setup for crystal growth. Schematic drawing of the experimental setup for C 8 -BTBT crystal growth. Supplementary Figure 2 AFM study of the C 8 -BTBT crystal growth

More information

Transparent Electrode Applications

Transparent Electrode Applications Transparent Electrode Applications LCD Solar Cells Touch Screen Indium Tin Oxide (ITO) Zinc Oxide (ZnO) - High conductivity - High transparency - Resistant to environmental effects - Rare material (Indium)

More information

Intrinsic Electronic Transport Properties of High. Information

Intrinsic Electronic Transport Properties of High. Information Intrinsic Electronic Transport Properties of High Quality and MoS 2 : Supporting Information Britton W. H. Baugher, Hugh O. H. Churchill, Yafang Yang, and Pablo Jarillo-Herrero Department of Physics, Massachusetts

More information

Supplementary Figure 1 XPS, Raman and TGA characterizations on GO and freeze-dried HGF and GF. (a) XPS survey spectra and (b) C1s spectra.

Supplementary Figure 1 XPS, Raman and TGA characterizations on GO and freeze-dried HGF and GF. (a) XPS survey spectra and (b) C1s spectra. Supplementary Figure 1 XPS, Raman and TGA characterizations on GO and freeze-dried HGF and GF. (a) XPS survey spectra and (b) C1s spectra. (c) Raman spectra. (d) TGA curves. All results confirm efficient

More information

Electrochemically Exfoliated Graphene as Solution-Processable, Highly-Conductive Electrodes for Organic Electronics

Electrochemically Exfoliated Graphene as Solution-Processable, Highly-Conductive Electrodes for Organic Electronics Supporting Information Electrochemically Exfoliated Graphene as Solution-Processable, Highly-Conductive Electrodes for Organic Electronics Khaled Parvez, Rongjin Li, Sreenivasa Reddy Puniredd, Yenny Hernandez,

More information

SUPPLEMENTARY INFORMATION

SUPPLEMENTARY INFORMATION SUPPLEMENTARY INFORMATION Flexible, high-performance carbon nanotube integrated circuits Dong-ming Sun, Marina Y. Timmermans, Ying Tian, Albert G. Nasibulin, Esko I. Kauppinen, Shigeru Kishimoto, Takashi

More information

Supporting Information

Supporting Information Copyright WILEY-VCH Verlag GmbH & Co. KGaA, 69469 Weinheim, Germany, 2018. Supporting Information for Small, DOI: 10.1002/smll.201801523 Ultrasensitive Surface-Enhanced Raman Spectroscopy Detection Based

More information

Optimizing Graphene Morphology on SiC(0001)

Optimizing Graphene Morphology on SiC(0001) Optimizing Graphene Morphology on SiC(0001) James B. Hannon Rudolf M. Tromp Graphene sheets Graphene sheets can be formed into 0D,1D, 2D, and 3D structures Chemically inert Intrinsically high carrier mobility

More information

Shedding New Light on Materials Science with Raman Imaging

Shedding New Light on Materials Science with Raman Imaging Shedding New Light on Materials Science with Raman Imaging Robert Heintz, Ph.D. Senior Applications Specialist 1 The world leader in serving science Raman Imaging Provides More Information Microscope problems

More information

Supplementary Information

Supplementary Information Supplementary Information Supplementary Figure 1. fabrication. A schematic of the experimental setup used for graphene Supplementary Figure 2. Emission spectrum of the plasma: Negative peaks indicate an

More information

Supplementary Materials for

Supplementary Materials for advances.sciencemag.org/cgi/content/full/2/7/e1600322/dc1 Supplementary Materials for Ultrasensitive molecular sensor using N-doped graphene through enhanced Raman scattering Simin Feng, Maria Cristina

More information

Supplementary Figure 1. Electron micrographs of graphene and converted h-bn. (a) Low magnification STEM-ADF images of the graphene sample before

Supplementary Figure 1. Electron micrographs of graphene and converted h-bn. (a) Low magnification STEM-ADF images of the graphene sample before Supplementary Figure 1. Electron micrographs of graphene and converted h-bn. (a) Low magnification STEM-ADF images of the graphene sample before conversion. Most of the graphene sample was folded after

More information

Supplementary Information

Supplementary Information Supplementary Information Plasma-assisted reduction of graphene oxide at low temperature and atmospheric pressure for flexible conductor applications Seung Whan Lee 1, Cecilia Mattevi 2, Manish Chhowalla

More information

Figure 1: Graphene release, transfer and stacking processes. The graphene stacking began with CVD

Figure 1: Graphene release, transfer and stacking processes. The graphene stacking began with CVD Supplementary figure 1 Graphene Growth and Transfer Graphene PMMA FeCl 3 DI water Copper foil CVD growth Back side etch PMMA coating Copper etch in 0.25M FeCl 3 DI water rinse 1 st transfer DI water 1:10

More information

SUPPLEMENTARY INFORMATION

SUPPLEMENTARY INFORMATION SUPPLEMENTARY INFORMATION Supplementary Information Figure S1: (a) Initial configuration of hydroxyl and epoxy groups used in the MD calculations based on the observations of Cai et al. [Ref 27 in the

More information

Supporting Information

Supporting Information Supporting Information Repeated Growth Etching Regrowth for Large-Area Defect-Free Single-Crystal Graphene by Chemical Vapor Deposition Teng Ma, 1 Wencai Ren, 1 * Zhibo Liu, 1 Le Huang, 2 Lai-Peng Ma,

More information

Graphene films on silicon carbide (SiC) wafers supplied by Nitride Crystals, Inc.

Graphene films on silicon carbide (SiC) wafers supplied by Nitride Crystals, Inc. 9702 Gayton Road, Suite 320, Richmond, VA 23238, USA Phone: +1 (804) 709-6696 info@nitride-crystals.com www.nitride-crystals.com Graphene films on silicon carbide (SiC) wafers supplied by Nitride Crystals,

More information

Supplementary Figure 1 A schematic representation of the different reaction mechanisms

Supplementary Figure 1 A schematic representation of the different reaction mechanisms Supplementary Figure 1 A schematic representation of the different reaction mechanisms observed in electrode materials for lithium batteries. Black circles: voids in the crystal structure, blue circles:

More information

Graphene oxide hydrogel at solid/liquid interface

Graphene oxide hydrogel at solid/liquid interface Electronic Supplementary Information Graphene oxide hydrogel at solid/liquid interface Jiao-Jing Shao, Si-Da Wu, Shao-Bo Zhang, Wei Lv, Fang-Yuan Su and Quan-Hong Yang * Key Laboratory for Green Chemical

More information

Supporting Information

Supporting Information Electronic Supplementary Material (ESI) for Journal of Materials Chemistry A. This journal is The Royal Society of Chemistry 2017 Supporting Information NiSe 2 Pyramids Deposited on N-doped Graphene Encapsulated

More information

Supporting Information. Fast Synthesis of High-Performance Graphene by Rapid Thermal Chemical Vapor Deposition

Supporting Information. Fast Synthesis of High-Performance Graphene by Rapid Thermal Chemical Vapor Deposition 1 Supporting Information Fast Synthesis of High-Performance Graphene by Rapid Thermal Chemical Vapor Deposition Jaechul Ryu, 1,2, Youngsoo Kim, 4, Dongkwan Won, 1 Nayoung Kim, 1 Jin Sung Park, 1 Eun-Kyu

More information

Multidimensional Thin Film Hybrid Electrodes. Hydrogen Evolution Reaction

Multidimensional Thin Film Hybrid Electrodes. Hydrogen Evolution Reaction Multidimensional Thin Film Hybrid Electrodes with MoS2 Multilayer for Electrocatalytic Hydrogen Evolution Reaction Eungjin Ahn 1 and Byeong-Su Kim 1,2 * 1 Department of Energy Engineering and 2 Department

More information

2011 GCEP Report. Project title: Self-sorting of Carbon Nanotubes for High Performance Large Area Transparent Electrodes for Solar Cells

2011 GCEP Report. Project title: Self-sorting of Carbon Nanotubes for High Performance Large Area Transparent Electrodes for Solar Cells 2011 GCEP Report Project title: Self-sorting of Carbon Nanotubes for High Performance Large Area Transparent Electrodes for Solar Cells Investigators Zhenan Bao, Associate Professor, Chemical Engineering

More information

Supplementary Figure 1: Micromechanical cleavage of graphene on oxygen plasma treated Si/SiO2. Supplementary Figure 2: Comparison of hbn yield.

Supplementary Figure 1: Micromechanical cleavage of graphene on oxygen plasma treated Si/SiO2. Supplementary Figure 2: Comparison of hbn yield. 1 2 3 4 Supplementary Figure 1: Micromechanical cleavage of graphene on oxygen plasma treated Si/SiO 2. Optical microscopy images of three examples of large single layer graphene flakes cleaved on a single

More information

Supplementary material for High responsivity mid-infrared graphene detectors with antenna-enhanced photo-carrier generation and collection

Supplementary material for High responsivity mid-infrared graphene detectors with antenna-enhanced photo-carrier generation and collection Supplementary material for High responsivity mid-infrared graphene detectors with antenna-enhanced photo-carrier generation and collection Yu Yao 1, Raji Shankar 1, Patrick Rauter 1, Yi Song 2, Jing Kong

More information

Supplementary Information: Supplementary Figure 1. Resistance dependence on pressure in the semiconducting region.

Supplementary Information: Supplementary Figure 1. Resistance dependence on pressure in the semiconducting region. Supplementary Information: Supplementary Figure 1. Resistance dependence on pressure in the semiconducting region. The pressure activated carrier transport model shows good agreement with the experimental

More information

Supplementary Information

Supplementary Information Electronic Supplementary Material (ESI) for Physical Chemistry Chemical Physics. This journal is the Owner Societies 2015 Supplementary Information Vertical Heterostructures of MoS2 and Graphene Nanoribbons

More information

High Yield Synthesis of Aspect Ratio Controlled. Graphenic Materials from Anthracite Coal in

High Yield Synthesis of Aspect Ratio Controlled. Graphenic Materials from Anthracite Coal in Supporting Information High Yield Synthesis of Aspect Ratio Controlled Graphenic Materials from Anthracite Coal in Supercritical Fluids Suchithra Padmajan Sasikala 1, Lucile Henry 1, Gulen Yesilbag Tonga

More information

Supplementary Information

Supplementary Information Supplementary Information Aging of Transition Metal Dichalcogenide Monolayers Jian Gao 1, Baichang Li 1, Jiawei Tan 1, Phil Chow 1, Toh-Ming Lu 2* and Nikhil Koratkar 1,3* 1 Materials Science and Engineering,

More information

Three-dimensional flexible and conductive interconnected graphene networks grown by chemical vapour deposition

Three-dimensional flexible and conductive interconnected graphene networks grown by chemical vapour deposition SUPPLEMENTARY INFORMATION Three-dimensional flexible and conductive interconnected graphene networks grown by chemical vapour deposition S1. Characterization of the graphene foam (GF) and GF/PDMS composites

More information

Electronic Supplementary Information

Electronic Supplementary Information Electronic Supplementary Information Selective Diels-Alder cycloaddition on semiconducting single-walled carbon nanotubes for potential separation application Jiao-Tong Sun, Lu-Yang Zhao, Chun-Yan Hong,

More information

Supplementary Materials for. Incommensurate Graphene Foam as a High Capacity Lithium. Intercalation Anode

Supplementary Materials for. Incommensurate Graphene Foam as a High Capacity Lithium. Intercalation Anode Supplementary Materials for Incommensurate Graphene Foam as a High Capacity Lithium Intercalation Anode Tereza M. Paronyan* 1, Arjun Kumar Thapa 2, Andriy Sherehiy 3, Jacek B. Jasinski 2, John Samuel Dilip

More information

Surfactant-free exfoliation of graphite in aqueous solutions

Surfactant-free exfoliation of graphite in aqueous solutions Surfactant-free exfoliation of graphite in aqueous solutions Karen B. Ricardo, Anne Sendecki, and Haitao Liu * Department of Chemistry, University of Pittsburgh, Pittsburgh, PA 15260, U.S.A 1. Materials

More information

Raman spectroscopy at the edges of multilayer graphene

Raman spectroscopy at the edges of multilayer graphene Raman spectroscopy at the edges of multilayer graphene Q. -Q. Li, X. Zhang, W. -P. Han, Y. Lu, W. Shi, J. -B. Wu, P. -H. Tan* State Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors,

More information

School of Physical Science and Technology, ShanghaiTech University, Shanghai

School of Physical Science and Technology, ShanghaiTech University, Shanghai Electronic Supplementary Material (ESI) for RSC Advances. This journal is The Royal Society of Chemistry 2015 1 Facile Two-step thermal annealing of graphite oxide in air for graphene with a 2 higher C/O

More information

Carbon Nanotubes: Development of Nanomaterials for Hydrogen Storage

Carbon Nanotubes: Development of Nanomaterials for Hydrogen Storage Carbon Nanotubes: Development of Nanomaterials for Hydrogen Storage Hongjie Dai Department of Chemistry & Laboratory for Advanced Materials Stanford University GCEP, September 19, 2006 Outline Can carbon

More information

Direct-writing on monolayer GO with Pt-free AFM tips in the

Direct-writing on monolayer GO with Pt-free AFM tips in the Supplementary Figure S1 Direct-writing on monolayer GO with Pt-free AFM tips in the presence of hydrogen. We replaced the Pt-coated tip with a gold-coated tip or an untreated fresh silicon tip, and kept

More information

Supplementary Information for Solution-Synthesized Chevron Graphene Nanoribbons Exfoliated onto H:Si(100)

Supplementary Information for Solution-Synthesized Chevron Graphene Nanoribbons Exfoliated onto H:Si(100) Supplementary Information for Solution-Synthesized Chevron Graphene Nanoribbons Exfoliated onto H:Si(100) Adrian Radocea,, Tao Sun,, Timothy H. Vo, Alexander Sinitskii,,# Narayana R. Aluru,, and Joseph

More information

Supplementary information for:

Supplementary information for: Supplementary information for: Solvent dispersible nanoplatinum-carbon nanotube hybrids for application in homogeneous catalysis Yuhong Chen, Xueyan Zhang and Somenath Mitra* Department of Chemistry and

More information

Journal Name. Supporting Information. Significant enhancement in blue emission and electrical conductivity of N-doped graphene. Dynamic Article Links

Journal Name. Supporting Information. Significant enhancement in blue emission and electrical conductivity of N-doped graphene. Dynamic Article Links Journal Name Dynamic Article Links Cite this: DOI:.39/c0xx00000x www.rsc.org/xxxxxx Supporting Information Significant enhancement in blue emission and electrical conductivity of N-doped graphene Tran

More information

Thermally-Limited Current Carrying Ability of Graphene Nanoribbons

Thermally-Limited Current Carrying Ability of Graphene Nanoribbons 1 Thermally-Limited Current Carrying Ability of Graphene Nanoribbons Albert D. Liao 1,2,, Justin Z. Wu 3,4,, Xinran Wang 4, Kristof Tahy 5, Debdeep Jena 5, Hongjie Dai 4,*, Eric Pop 1,2,6,* 1 Dept. of

More information

Supplementary information. Derivatization and Interlaminar Debonding of Graphite-Iron Nanoparticles Hybrid

Supplementary information. Derivatization and Interlaminar Debonding of Graphite-Iron Nanoparticles Hybrid Electronic Supplementary Material (ESI) for Physical Chemistry Chemical Physics. This journal is the Owner Societies 2017 Supplementary information Derivatization and Interlaminar Debonding of Graphite-Iron

More information

Surface atoms/molecules of a material act as an interface to its surrounding environment;

Surface atoms/molecules of a material act as an interface to its surrounding environment; 1 Chapter 1 Thesis Overview Surface atoms/molecules of a material act as an interface to its surrounding environment; their properties are often complicated by external adsorbates/species on the surface

More information

Supplementary Materials for

Supplementary Materials for advances.sciencemag.org/cgi/content/full/3/10/e1701661/dc1 Supplementary Materials for Defect passivation of transition metal dichalcogenides via a charge transfer van der Waals interface Jun Hong Park,

More information

Efficient Hydrogen Evolution. University of Central Florida, 4000 Central Florida Blvd. Orlando, Florida, 32816,

Efficient Hydrogen Evolution. University of Central Florida, 4000 Central Florida Blvd. Orlando, Florida, 32816, Electronic Supplementary Material (ESI) for Energy & Environmental Science. This journal is The Royal Society of Chemistry 2017 MoS 2 /TiO 2 Heterostructures as Nonmetal Plasmonic Photocatalysts for Highly

More information

Wafer-Scale Single-Domain-Like Graphene by. Defect-Selective Atomic Layer Deposition of

Wafer-Scale Single-Domain-Like Graphene by. Defect-Selective Atomic Layer Deposition of Electronic Supplementary Material (ESI) for Nanoscale. This journal is The Royal Society of Chemistry 2015 Wafer-Scale Single-Domain-Like Graphene by Defect-Selective Atomic Layer Deposition of Hexagonal

More information

Supporting Information

Supporting Information Electronic Supplementary Material (ESI) for Journal of Materials Chemistry C. This journal is The Royal Society of Chemistry 2018 Supporting Information Direct Integration of Polycrystalline Graphene on

More information

SUPPLEMENTARY INFORMATION

SUPPLEMENTARY INFORMATION SUPPLEMENTARY INFORMATION Towards wafer-size graphene layers by atmospheric pressure graphitization of silicon carbide Supporting online material Konstantin V. Emtsev 1, Aaron Bostwick 2, Karsten Horn

More information

Supporting Information

Supporting Information Copyright WILEY-VCH Verlag GmbH & Co. KGaA, 69469 Weinheim, Germany, 2015. Supporting Information for Adv. Mater., DOI: 10.1002/adma.201502134 Stable Metallic 1T-WS 2 Nanoribbons Intercalated with Ammonia

More information

Supporting Information s for

Supporting Information s for Supporting Information s for # Self-assembling of DNA-templated Au Nanoparticles into Nanowires and their enhanced SERS and Catalytic Applications Subrata Kundu* and M. Jayachandran Electrochemical Materials

More information

State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing , China

State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing , China Electronic Supplementary Material A Co-N/C hollow-sphere electrocatalyst derived from a metanilic CoAl layered double hydroxide for the oxygen reduction reaction, and its active sites in various ph media

More information

TiO 2 Nanocrystals Grown on Graphene as Advanced Photocatalytic Hybrid Materials

TiO 2 Nanocrystals Grown on Graphene as Advanced Photocatalytic Hybrid Materials Nano Res. 2010, 3(10): 701 705 ISSN 1998-0124 701 DOI 10.1007/s12274-010-0033-5 CN 11-5974/O4 Research Article TiO 2 Nanocrystals Grown on Graphene as Advanced Photocatalytic Hybrid Materials Yongye Liang,

More information

Supplementary Figure 1. A photographic image of directionally grown perovskite films on a glass substrate (size: cm).

Supplementary Figure 1. A photographic image of directionally grown perovskite films on a glass substrate (size: cm). Supplementary Figure 1. A photographic image of directionally grown perovskite films on a glass substrate (size: 1.5 4.5 cm). 1 Supplementary Figure 2. Optical microscope images of MAPbI 3 films formed

More information

Enhanced photocurrent of ZnO nanorods array sensitized with graphene. quantum dots

Enhanced photocurrent of ZnO nanorods array sensitized with graphene. quantum dots Electronic Supplementary Material (ESI) for RSC Advances. This journal is The Royal Society of Chemistry 2015 Enhanced photocurrent of ZnO nanorods array sensitized with graphene quantum dots Bingjun Yang,

More information

Supplementary Figure 1 Characterization of the synthesized BP crystal (a) Optical microscopic image of bulk BP (scale bar: 100 μm).

Supplementary Figure 1 Characterization of the synthesized BP crystal (a) Optical microscopic image of bulk BP (scale bar: 100 μm). Supplementary Figure 1 Characterization of the synthesized BP crystal (a) Optical microscopic image of bulk BP (scale bar: 100 μm). Inset shows as-grown bulk BP specimen (scale bar: 5 mm). (b) Unit cell

More information

SUPPLEMENTARY INFORMATION

SUPPLEMENTARY INFORMATION SUPPLEMENTARY INFORMATION Covalent Bulk Functionalization of Graphene Jan M. Englert a, Christoph Dotzer a, Guang Yang b, Martin Schmid c, Christian Papp c, J. Michael Gottfried c, Hans-Peter Steinrück

More information

Conference Return Seminar- NANO2014,Moscow State University,Moscow,Russia Date: th July 2014

Conference Return Seminar- NANO2014,Moscow State University,Moscow,Russia Date: th July 2014 Conference Return Seminar- NANO2014,Moscow State University,Moscow,Russia Date:13-1818 th July 2014 An electrochemical method for the synthesis of single and few layers graphene sheets for high temperature

More information

Graphene The Search For Two Dimensions. Christopher Scott Friedline Arizona State University

Graphene The Search For Two Dimensions. Christopher Scott Friedline Arizona State University Graphene The Search For Two Dimensions Christopher Scott Friedline Arizona State University What Is Graphene? Single atomic layer of graphite arranged in a honeycomb crystal lattice Consists of sp 2 -bonded

More information

Supporting Information

Supporting Information Electronic Supplementary Material (ESI) for Journal of Materials Chemistry A. This journal is The Royal Society of Chemistry 2018 Supporting Information Adding refractory 5d transition metal W into PtCo

More information

File name: Supplementary Information Description: Supplementary Figures, Supplementary Notes, Supplementary Tables, Supplementary References

File name: Supplementary Information Description: Supplementary Figures, Supplementary Notes, Supplementary Tables, Supplementary References File name: Supplementary Information Description: Supplementary Figures, Supplementary Notes, Supplementary Tables, Supplementary References Supplementary Figure 1 Illustration of the reaction chamber

More information

Overview. Carbon in all its forms. Background & Discovery Fabrication. Important properties. Summary & References. Overview of current research

Overview. Carbon in all its forms. Background & Discovery Fabrication. Important properties. Summary & References. Overview of current research Graphene Prepared for Solid State Physics II Pr Dagotto Spring 2009 Laurene Tetard 03/23/09 Overview Carbon in all its forms Background & Discovery Fabrication Important properties Overview of current

More information

Title of file for HTML: Supplementary Information Description: Supplementary Figures and Supplementary References

Title of file for HTML: Supplementary Information Description: Supplementary Figures and Supplementary References Title of file for HTML: Supplementary Information Description: Supplementary Figures and Supplementary References Supplementary Figure 1. SEM images of perovskite single-crystal patterned thin film with

More information

SUPPLEMENTARY INFORMATION Low Temperature Atomic Layer Deposition of Zirconium Oxide for Inkjet Printed Transistor Applications

SUPPLEMENTARY INFORMATION Low Temperature Atomic Layer Deposition of Zirconium Oxide for Inkjet Printed Transistor Applications Electronic Supplementary Material (ESI) for RSC Advances. This journal is The Royal Society of Chemistry 2018 SUPPLEMENTARY INFORMATION Low Temperature Atomic Layer Deposition of Zirconium Oxide for Inkjet

More information

In situ formation of metal Cd x Zn 1-x S nanocrystals on graphene surface: A novel method to synthesis sulfide-graphene nanocomposites

In situ formation of metal Cd x Zn 1-x S nanocrystals on graphene surface: A novel method to synthesis sulfide-graphene nanocomposites Electronic Supplementary Material (ESI) for RSC Advances. This journal is The Royal Society of Chemistry 2014 In situ formation of metal Cd x Zn 1-x S nanocrystals on graphene surface: A novel method to

More information