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1 Volume 13 No. 22 June Vol. 29 No. 22 June Electrochemical Switching In article number , Walter Mérida and co-workers achieve tunable wettability on the surface of copper nanostructures via electrochemical redox reactions. Transitions from superhydrophobic to superhydrophilic wetting behavior are enabled by low voltage (<1.5 V) manipulation of the oxidation state in the top layer. A droplet manipulation system demonstrates the ability to handle particles on these surfaces. The methodology is transferrable to biomedical applications and smart filtration. Advanced Materials has been bringing you the best in materials research for twenty-five years. With its increased ISI Impact Factor of 18.96, Advanced Materials is one of the most influential journals in the field. Publishing every week, Advanced Materials now brings you even more of the latest results at the cutting edge of materials science. Photocatalysis Novel mixed-metal oxides/graphitic carbon nitride composites that are coupled using co-precipitation are described by Nguyen Thi Kim Phuong, Yong-Ill Lee, and co-workers in article number The electronic coupling between zinc oxide-zinc bismuth oxide and graphitic carbon nitride exhibits an excellent photocatalytic activity under visible light by synergic effect. 22/2017 Centering Single Cells in Microgels via Delayed Crosslinking Supports Long-Term 3D Culture by Preventing Cell Escape M. Karperien, J. Leijten, and co-workers Nanowire Transistors Ning Han, Johnny C. Ho, and co-workers develop a metal-oxide decoration scheme to modulate threshold voltage of III-V nanowire FETs through adjusting free carriers in the nanowire channel via decorating various metal-oxide nanoparticles with different work functions in article number Low-power InAs nanowire NMOS inverters, based on pristine depletion-mode and metal-oxide nanoparticles decorated enhancement-mode InAs NW-parallel-arrayed transistors, can demonstrate the versatility of this technique for future high-performance nanoelectronics. Small is the very best interdisciplinary forum for all experimental and theoretical aspects of fundamental and applied research at the micro and nano length scales. With an ISI impact Factor of 8.32 and publishing every week in 2017 with papers online in advance of print, Small is your first-choice venue for top-quality communications, detailed full papers, cutting-edge concepts, and in-depth reviews of all things micro and nano. Adv. Mater. Interfaces 2017, 4, WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim wileyonlinelibrary.com (1 of 5)

2 COMMUNICATIONS Separation Membranes K. Eum, C. Ma, D.-Y. Koh, F. Rashidi, Z. Li, C. W. Jones, R. P. Lively,* S. Nair* Zeolitic Imidazolate Framework Membranes Supported on Macroporous Carbon Hollow Fibers by Fluidic Processing Techniques Robust and selective zeolitic imidazolate framework (ZIF) membranes are synthesized by interfacial fluidic processing on macroporous carbon fibers. Such a generalized ZIF membrane synthesis process overcomes issues of stability and enables the use of ZIF membranes in a wide range of molecular separations. Magnetic Slippery Surfaces P. Irajizad, S. Ray, N. Farokhnia, M. Hasnain, S. Baldelli, H. Ghasemi* Remote Droplet Manipulation on Self- Healing Thermally Activated Magnetic Slippery Surfaces Thermally activated magnetic slippery surfaces are developed for remote and high mobility droplet manipulation. These surfaces provide an extremely lowfriction platform for locomotion of liquid droplets without any required custom fabrication of the solid. The implementation of these surfaces for droplet guiding, mixing, and trapping is demonstrated. The motion of droplets on these surfaces is independent of viscosity of the droplet. Water Purification F. Deuber, S. Mousavi, L. Federer, C. Adlhart* Amphiphilic Nanofiber-Based Aerogels for Selective Liquid Absorption from Electrospun Biopolymers Solid templating is the gate to the world of hierarchically structured nanofiberbased aerogels. These ultralight pullulan/ poly(vinyl alcohol) based materials rapidly absorb the 100-fold amount of liquid, thanks to their highly porous architecture. The amphiphilic absorption characteristics are tuned for the selective removal of nonpolar liquids from water by postsurface modification. FULL PAPER Electrochemical Switching B. Zahiri, P. K. Sow, C. H. Kung, W. Mérida* Active Control over the Wettability from Superhydrophobic to Superhydrophilic by Electrochemically Altering the Oxidation State in a Low Voltage Range Tunable wettability on electrochemically responsive copper nanostructure is introduced. Superhydrophobic to superhydrophilic wetting behavior can be achieved by low voltage (<1.5 V) electrochemical transformation of the topmost copper oxide layer to metallic copper. The process is reversed upon exposure to air. An integrated droplet manipulation system is also demonstrated. The methodology is transferrable to biomedical solid particle handling and smart filtration (2 of 5) 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim Adv. Mater. Interfaces 2017, 4,

3 A metal-oxide decoration scheme is utilized to modulate electronic transport properties (e.g., threshold voltage) of III V nanowire (NW) field-effect transistors through adjusting the free carriers in NW channels via decorating different metal-oxide nanoparticles with different work functions. InAs NW inverters based on intrinsic D-mode and metal-oxide nanoparticles decorated E-mode InAs NW-paralleled-arrayed transistors further demonstrate the versatility of this technique for future nanoelectronic device fabrication and circuit integration. Nanowire Transistors F. Wang, S. P. Yip, G. Dong, F. Xiu, L. Song, Z. Yang, D. Li, T. F. Hung, N. Han,* J. C. Ho* Manipulating III V Nanowire Transistor Performance via Surface Decoration of Metal-Oxide Nanoparticles Novel mixed-metal oxides/graphitic carbon nitride composites that are coupled using co-precipitation exhibit excellent photocatalytic activity to Rhodamine B. The mechanism for visible light photocatalytic mineralization of prepared sample is proposed. The prepared sample exhibits high chemical stability and efficiency as photocatalyst for environmental remediation. Photocatalysis B. T. Huy, C. T. B. Thao, V.-D. Dao, N. T. K. Phuong,* Y.-I. Lee* A Mixed-Metal Oxides/Graphitic Carbon Nitride: High Visible Light Photocatalytic Activity for Efficient Mineralization of Rhodamine B 3D hierarchically porous carbon nanocomposites constituting graphitic carbon nitride (g-c 3 N 4 ) chemically integrated with reduced graphene oxide (rgo) via covalent C N bonds are fabricated and used to load Pt nanoparticles to form 3D Pt-g-C 3 N 4 -rgo catalyst for direct methanol fuel cell anode. The catalyst shows an unusual electrocatalytic ability toward methanol electrooxidation, such as high activity, intriguing poison tolerance, and reliable long-term stability. Methanol Oxidation W. Zhang, Y. Fu,* J. Wang, X. Wang* D Hierarchically Porous Graphitic Carbon Nitride Modified Graphene-Pt Hybrid as Efficient Methanol Oxidation Catalysts How to contact us: Editorial Office: Phone: (+49) Fax: (+49) advmatinterfaces@wiley-vch.de Reprints: advmatinterfaces@wiley-vch.de Copyright Permission: Fax: (+49) rights@wiley-vch.de Adv. Mater. Interfaces 2017, 4, WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim (3 of 5)

4 Electrocatalysis J. Wang, J. W. Chen, J. D. Chen, H. Zhu, M. Zhang, M. L. Du* Well-dispersed Pt/Cu alloy nanoparticles encapsulated in carbon nanofibers are synthesized and possess outstanding hydrogen evolution reaction activity. Designed Synthesis of Size-Controlled Pt Cu Alloy Nanoparticles Encapsulated in Carbon Nanofibers and Their High Efficient Electrocatalytic Activity Toward Hydrogen Evolution Reaction Supercapacitors Y. An, Z. Li, Y. Yang, B. Guo, Z. Zhang, H. Wu, Z. Hu* Synthesis of Hierarchically Porous Nitrogen-Doped Carbon Nanosheets from Agaric for High-Performance Symmetric Supercapacitors Optimization of the high surface area, pore size, structure, and distribution is an effective strategy to improve the capacitive performance of carbon-based materials. The symmetric supercapacitor based hierarchically porous, nitrogen-doped, and interconnected carbon nanosheets exhibit high energy density, good rate capability, and high power density. Wetting Behaviour P. Ge, S. Wang, W. Liu, T. Wang, N. Yu, P. Xue, H. Chen, H. Shen, J. Zhang,* B. Yang Anisotropic Wetting of Water on Patterned Asymmetric Nanostructure Arrays Two asymmetric nanostructures arrays with different directions are integrated in a single surface. Water shows unidirectional wetting on it toward resultant direction of the two wetting directions, which provides a strategy to modulate the wetting behavior of water. Interface Interaction J. W. Chai, M. Yang,* M. Callsen, J. Zhou, T. Yang, Z. Zhang, J. S. Pan, D. Z. Chi, Y. P. Feng, S. J. Wang* Tuning Contact Barrier Height between Metals and MoS 2 Monolayer through Interface Engineering Based on first-principles calculations, it has been shown that the interaction between metals and MoS 2 monolayer can be tuned by interface engineering. By using an additional MoS 2 layer as a buffer layer, the strong interfacial interaction is reduced, which results in a significantly lowered Schottky barrier height and a semiconducting MoS 2 channel layer (4 of 5) 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim Adv. Mater. Interfaces 2017, 4,

5 Cobalt pyrophosphate nanosheets, synthesized by a facile hydrothermal method, are studied for supercapacitor application in aqueous electrolyte. The electrochemical performance of nanosheets is enhanced more than twice using low amount of redox additive. With redox additive, prepared nanosheets display 580 F g 1 at 1 A g 1 current density in 0.68 V potential window with exceptional cyclic stability up to 5000 cycles. Nanosheets Z. Khan,* B. Senthilkumar, S. Lim, R. Shanker, Y. Kim, H. Ko* Redox-Additive-Enhanced High Capacitance Supercapacitors Based on Co 2 P 2 O 7 Nanosheets The origin of the capacity increasing is verified by a long-life Sn Fe 3 O graphite composite anode, demonstrating that the capacity increasing comes from the partial reversible formation and dissolution of growing solid electrolyte interphase on the surface of active materials. This process causes the Li + irreversible consuming, but also favors the kinetics of the ternary composite anode in the battery system. Energy Storage H. Zhang, R. Hu, Y. Liu, J. Liu, Z. Lu, M. Zhu* Origin of Capacity Increasing in a Long- Life Ternary Sn Fe 3 O Anode for Li-Ion Batteries Magnesium alloy of low Al is anodized in a mixture solution of NaOH and NaAlO 2. The obtained anodic film is used as the source of cations to fabricate Mg-Al layered double hydroxides (LDHs), without the introduction of any kind of extra trivalent cations. The pores in anodic film are successfully sealed by LDHs and the vanadate loaded LDH film exhibits better corrosion resistance. Anodic Films G. Zhang, L. Wu,* A. Tang,* S. Zhang, B. Yuan, Z. Zheng, F. Pan A Novel Approach to Fabricate Protective Layered Double Hydroxide Films on the Surface of Anodized Mg-Al Alloy Adv. Mater. Interfaces 2017, 4, WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim (5 of 5)