2 nd Workshop on Nanoscience: Carbon-Related Systems and Nanomaterials July 3-7, 2012, NCKU, Tainan, Taiwan

Transcription

1 2 nd Workshop on Nanoscience: Carbon-Related Systems and Nanomaterials July 3-7, 2012, NCKU, Tainan, Taiwan

2 Reorganization of sp 2 carbon, and the tubule growth Synthesis of nano-carbon materials Carbon nano-tubes (CNTs) Carbon nano-horns (CNHs) Graphene sheets HRTEM & EELS imaging of sp 2 carbon materials on individual atom basis Some applications of nanocarbon materials

3 Iijima, Micron, 8, (1978) 2nm W cluster WO 3 + C W(or WC)+ CO 2 Apoferritin molecules

4 Iijima, Optik, nm

5 Chaunhong Jin, et al., PRL 2009 S. Iijima, Optik, 1977 Hashimoto et al., Nature 2004 C. Jin et al., Nano Lett 2008 C. Jin. et al., ACS Nano 2008 single layer single layer

6 Chaunhongh Jin, et al., PRL 2009 Cumulene =C=C=C=C= Polyyne H C C C C H The method similar to that for the metal quantum wires; A lower beam intensity. 120 kv and 80 kv.

7 C.-C. Lu, et al. Langmuire 27 pp (2011).

8 Z. Liu, et al., Nature Comm W atoms appear brighter than the S atoms. The edges of this monolayered WS 2 nanoribbon are S-terminated on one side (upper side) and W- terminated on the other side (lower side) and this structure does not change with width of monolayered WS 2 nanoribbon. It is very interesting that only the zigzag edges were observed in this study. (A) STEM ADF image of monolayered WS 2 nanoribbon encapsulated inside SWNT with [001] direction illustrated t the trigonal symmetry, confirming i the monolayered structure. t (B) (B) An enlarged view of the rectangle region in A and the corresponding simulated image (lower part). (C) (C) Model of monolayered WS 2 structure looking through [001] and [010] directions.

9 X=0 #1000 #0802 W content t #0505 We can see how two kinds of atoms are mixed in a solid solution! X=1 #0208 #0010

10 Dr. Suenaga Atom-by-atom spectroscopy at graphene edge K. Suenaga and M. Koshino, Nature, 468 pp (2010)

11 electrons electrons TEM STEM EELS EELS spectroscopy py Er carbon

12 (a) (b) (c) (d) (e) ADF La La + Ce Ce (subtracted) Carbon Discrimination of La(Z=57) & Ce(Z=58) Discrimination of Ce 3+ & Ce 4+

13 Chaunhong. Jin, et al., PRL 2009 The triangles: regular triangle shape discrete sizes in the same orientation The smallest ones: mono-vacancy of boron

14 Suenaga and Koshino, Nature, 468 (2010) a c D * S * b

15 Reorganization of sp 2 carbon, and the tubule growth Synthesis of nano-carbon materials Carbon nano-tubes (CNTs) Carbon nano-horns (CNHs) Graphene sheets HRTEM & EELS imaging of sp 2 carbon materials on individual atom basis Some applications of nanocarbon materials

16 FE electron source Semiconducting (Metallic) FED, X-ray tubes Large surface area Gas adsorbent Super-capacitor Black body Biomedicine Nano-size needle SPM probes Flexible transistor Heat conductor Radiator Heavy ion charge stripper Flexible Electric conductor Conductive plastic films LSI-via-wiring Heater Chemically stable Tensile strength Light weight Composite materials (metal, polymer) MEMS

17 CNT-Touch Screen Displays CNT charge stripper for RIBF at RIKEN 5 inch 4 inch Smartphone Electronic paper

18 FET TFT- FET Gate Drain Source Controlled growth S-M Separation Transparent & flexible conductive films Thin film transistors (printable-ink-jet)

19 Hata et al. Science 2004 Substantial cost down and efficiency! Yield [ m] Futaba et al., PRL Water-Ethylene Ratio Size: 2 x 2cm 50 X 50cm 2 Substrate: Si Stainless steel foil Carrier gas: He + H2 N2 + H2

20 Synthesis at lab-scale Carbon nanotubes Si wafer Vacuum deposition of catalyst Batch process Industrial production Catalyst Carbon nanotubes Rolled metal films Coating Continuous process Reuse of substrate

21 Length 12m Super growth SWCNT Sample will be supplied by AIST+ Nippon Zeon

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23 Hayamizu et al. Nature Nanotechnology 2008 All CNTs ON/OFF ratio 10 7

24 K. Hata & Ming Xu, et al., Science 330 (2010) Colored: CNT Rubber Grey: Silicone Rubber

25 A B C D Confocal microscope images of muribe macrophage cell line RAW after incubating with coronenes@swcnts wrapped with DSPE-mPEG. (A) Differential interference contrast (DIC) image. (B) Combined DIC and fluorescence images. Fluorescence images obtained from (C) coronenes@swcnts and (D) lysosomal markers (excitation wavelength = 488 nm, detection wavelength > 510 nm).

26 Phospholipid (PL) SWNT Bovine serum album (BSA) A phospholipid BSA -functionalized single-walled carbon nanotube complex (PL BSA SWNT) was synthesized and shown to be readily dispersible in poly dimethyl-siloxane (PDMS). A photoinduced PDMS microchip encapsulating the PL BSA SWNT complex is capable of ultrarapid control of the temperature t of a solution in a microchannel in the chip. This system should be useful in various labon-a-chip applications. MAX 55 E. Miyako et al. Angew. Chem. 47, (2008). Ultrafast control of the temperature!!

27 E. Miyako et al. Angew. Chem. Int. Ed. 50, (2011). Si O : Poly(dimethyl-siloxane) SWNT as a base polymer matrix S n C 6 H 13 : Poly(3-hexylthiophene) (P3HT) as a dispersion agent Highly flexible CNT polymer composite We developed carbon nanotube (CNT)-based photo-thermal-electrical (PTE) converter that can be manipulated using a laser capable of transmission through a living body. Our present study represents important progress towards a wireless electrical power supply system for implantable medical devices as well as various bionic applications. Implanted!! CNT-based PTE convertor

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29 1 un A sample of diameter1.7 diameter nm 9nm for Peapods G/D ratio >200 T. Saito, et al,.j.phys.chhem T High purity SWCNTs by DIPS method

30 Tomanek, Iijima et al., PRL 108, (2012)

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33 * Gas storage for F2 etc. * Various electrodes * Supercapacitor * Nanomedicine 30 ~ 100nm (Photodynamic or photothermal therapy) 100nm

34 Drug delivery carrier Ajima et al. Molecular Pharmaceutics 2005 Cisplatin Drug: Cisplatin, Dexamethasone (anti anti-- inflammatory agent ) Targeting Material Drug carrier 200 nm 10 nm 2 nm CDDS Cl Cl Pt NH3 NH3 1 nm

35 Yudasaka et al., PNAS, 105, 14775(2008)

36 Heat shock promoter-mediated gene expression triggered by laser-induced carbon nanohorns Miyako et al. PNAS in vivo, luciferase laser power, 150 mw (~12 mw/mm 2 ), 5min

37 Waveguide: Microwave 2.45 GHz Slot antenna Dielectric window Surface wave Surface wave Surface wave excited plasma region ~10 ev Diffusion plasma region ~2 ev gas particle radical ion electron Substrate CVD area: 60 cm 40 cm MW power: 3-5 kw per a MW generator Gas: H2/CH4 /Ar Substrate: Cu (t30 μm) and Al (t12 μm) foils Gas pressure: 3-5 Pa Substrate temperature: below 400 Deposition time: s

38 Hasegawa et al., JAP, 2010 (Raman shift,638 nm, 1 μm spot size (a) Cu foil (CVD conditions: 5 Pa, CH 4 /Ar/H 2 =30/20/10 sccm, 3 kw per a MW generator, 30 s) substrate temperatures below 400 C 81% transparency Various CVD conditions (b) Al foil (CVD conditions: 3 Pa, CH 4 /Ar/H 2 =30/20/10 sccm, 4 kw, 180 s). (c) Substrate temperature profile.

39 Capacitave type Surface resistance kω/sq Transparency 80% (with PET film, 90% only for Graphene) Number of graphene sheets : 4~5 sheets

40 Reorganization of sp 2 carbon, and the tubule growth Synthesis of nano-carbon materials Carbon nano-tubes (CNTs) Carbon nano-horns (CNHs) Graphene sheets HRTEM & EELS imaging of sp 2 carbon materials on individual atom basis Some applications of nanocarbon materials