Advanced Materials Interfaces

Cover image for Vol. 1 Issue 3

June, 2014

Volume 1, Issue 3

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      Metal Nanoclusters: Growth Mechanism of Metal Clusters on a Graphene/Ru(0001) Template (Adv. Mater. Interfaces 3/2014)

      L. Z. Zhang, S. X. Du, J. T. Sun, L. Huang, L. Meng, W. Y. Xu, L. D. Pan, Y. Pan, Y. L. Wang, W. A. Hofer and H.-J. Gao

      Article first published online: 13 JUN 2014 | DOI: 10.1002/admi.201470015

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      The mechanism of selective adsorption and growth mode of transition metal atoms on a graphene/Ru (0001) moiré template is investigated by Shixuan Du, and co-workers in article 1300104 via densityfunctional-theory-based first principle calculations. It reveals that the local hybridization of the template plays an important role in the selective adsorption and even the growth mode of the following metal nano-clusters.

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      Organic Photovoltaics: Suppression of Time-Dependent Donor/Acceptor Interface Degradation by Redistributing Donor Charge Density (Adv. Mater. Interfaces 3/2014)

      Ming-Fai Lo, Tsz-Wai Ng, Hin-Wai Mo, Xian-Feng Chen and Chun-Sing Lee

      Article first published online: 13 JUN 2014 | DOI: 10.1002/admi.201470016

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      Chun-Sing Lee, Tsz-Wai Ng, and co-workers demonstrate in article 1300082 the significant OPV device stability enhancement by direct charge manipulation of organic donor molecules using nano-island structured MoO3 features. The charge-transfer complex forming at the MoO3/donor contact results in charge redistribution in donor molecules and suppression of the time-dependent chemical reaction at the donor/acceptor interface.

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      Plasmonics: In Situ Nanoimaging of Photoinduced Charge Separation at the Plasmonic Au Nanoparticle-TiO2 Interface (Adv. Mater. Interfaces 3/2014)

      Emiko Kazuma and Tetsu Tatsuma

      Article first published online: 13 JUN 2014 | DOI: 10.1002/admi.201470021

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      Tetsu Tatsuma and co-workers visualize in article 1400066 photoinduced charge distributions for Au nanoparticles deposited on single crystalline TiO2. The cover illustrates plasmonic gold nanoprisms on titanium dioxide substrates. The front one is irradiated with near infrared light, so that electrons are injected from the excited gold into titanium dioxide, whereas the back one is irradiated with UV light, so that electrons are transferred from excited titanium dioxide to gold.

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      Masthead: (Adv. Mater. Interfaces 3/2014)

      Article first published online: 13 JUN 2014 | DOI: 10.1002/admi.201470020

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      Contents: (Adv. Mater. Interfaces 3/2014)

      Article first published online: 13 JUN 2014 | DOI: 10.1002/admi.201470017

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    1. Nanomechanical and Charge Transport Properties of Two-Dimensional Atomic Sheets

      Jeong Y. Park, Sangku Kwon and Jong Hun Kim

      Article first published online: 25 FEB 2014 | DOI: 10.1002/admi.201300089

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      This review highlights recent studies of nanomechanical and charge transport properties of two-dimensional atomic sheets, including graphene, MoS2, and boron nitrides. Mapping of the conductance and nanomechanical properties can be used to image the domain and microstructures of two-dimensional atomic layers. This paper addresses the role of bending, defects, and microstructures on nanomechanical and transport properties of graphene-derived materials.

  7. Communications

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    1. Clickable Mesoporous Silica via Functionalization with 1,ω-Alkenes

      Sebastiaan A. van den Berg, Jing Tu, Karen M. Sliedregt, Alexander Kros, Tom Wennekes and Han Zuilhof

      Article first published online: 8 FEB 2014 | DOI: 10.1002/admi.201300061

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      Tuning the surface properties of mesoporous silica is desirable for many applications, such as catalysis. We present a new modification method of calcined mesoporous silica, based on the thermal grafting of 1,7-octadiene. This easy method generates a high loading of terminal alkenes. We show that the modified surface is directly available for thiol-ene click chemistry, which enables a wide variety of molecules to be attached to this alkene-functionalized mesoporous silica.

    2. Substrate-Independent Underwater Superoleophobic Surfaces Inspired by Fish-Skin and Mussel-Adhesives

      Wei Ma, Hang Xu and Atsushi Takahara

      Article first published online: 11 FEB 2014 | DOI: 10.1002/admi.201300092

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      Substrate-independent underwater superoleophobic surfaces are designed by combining two bio-inspirations: the remarkable oil-repellence of fish skin and the versatile anchoring ability of mussel-adhesive proteins. A mussel-inspired polymer is synthesized, showing strong underwater adhesion to various substrates. A fish-skin inspired top layer is then assembled on this polymer coating through a layer-by-layer process.

    3. Solution-Processed Crystalline Silicon Thin-Film Solar Cells

      Tobias Sontheimer, Daniel Amkreutz, Katharina Schulz, Paul H. Wöbkenberg, Christian Guenther, Vadym Bakumov, Joachim Erz, Christoph Mader, Stephan Traut, Florian Ruske, Moshe Weizman, Alexander Schnegg, Matthias Patz, Martin Trocha, Odo Wunnicke and Bernd Rech

      Article first published online: 12 FEB 2014 | DOI: 10.1002/admi.201300046

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      Tailored crystalline Si thin films are prepared in a slot die- or spin-coating process with Si precursor solutions based on neopantasilane and a subsequent crystallization process. These solution-processed films with a thickness from a few nanometers to 4 μm exhibit excellent key characteristics for the development of high-quality solution-based crystalline Si thin-film solar cells.

    4. Nonvolatile Transport States in Ferrite Thin Films Induced by Field-Effect Involving Redox Processes

      Kohei Fujiwara, Takashi Ichimura and Hidekazu Tanaka

      Article first published online: 12 FEB 2014 | DOI: 10.1002/admi.201300108

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      The conductivity and magnetoresistance of a practically useful ferrite compound are found to be electrically programmable in a nonvolatile manner. Electric-double-layer gating using an ionic liquid changes the surface oxidation state of spinel zinc ferrite via reversible redox processes. This unique electric-field effect, distinct from conventional electrostatic carrier doping, provides a new route for developing oxide-based field-effect devices.

    5. Enhancing Properties of High-Temperature Superconducting Step-Edge Josephson Junctions by Nano-Multilayers with a Small Mismatch

      A. V. Pan, O. V. Shcherbakova, S. A. Fedoseev, I. A. Golovchanskiy, D. Attard, S. K. H. Lam, J. Du, C. P. Foley, S. Rubanov and A. Suvorova

      Article first published online: 11 FEB 2014 | DOI: 10.1002/admi.201300112

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      A new technology for high temperature superconducting Josephson tunnelling junctions is developed to enhance their properties for applications on-a-chip, avoiding additional fabrication complexity. Junctions with alternating nano-layers of YBa2Cu3O7 and NdBa2Cu3O7 superconductors with a small mismatch between their crystal lattices exhibit stronger tunneling properties due to tuning the artificial grain boundary interfaces of the junctions.

    6. Superior Surface Transfer Doping of Diamond with MoO3

      Moshe Tordjman, Cecile Saguy, Asaf Bolker and Rafi Kalish

      Article first published online: 8 FEB 2014 | DOI: 10.1002/admi.201300155

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      A conductive diamond surface with highest yet reported sheet conductivity and unsurpassed thermal stability is shown to be due to surface transfer doping of hydrogen terminated diamond by a molybdenum trioxide (MoO3). Surface conductivities, as determined by Hall Effect measurements as function of temperature for different MoO3 thicknesses, have yielded total areal hole densities ranging from 7 × 1013 cm−2 to 1 × 1014 cm−2, exceeding those reported for H2O transfer doped diamond.

    7. Tunable, Source-Controlled Formation of Platinum Silicides and Nanogaps from Thin Precursor Films

      Frank Streller, Graham E. Wabiszewski, Filippo Mangolini, Gang Feng and Robert W. Carpick

      Article first published online: 25 FEB 2014 | DOI: 10.1002/admi.201300120

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      Platinum silicide thin films are ideal for electromechanical applications. Here, films are formed from thin bilayers of amorphous silicon and platinum for the first time. Simply changing the thickness ratio of the two materials in the bilayer allows the final film stoichiometry, and correspondingly, its mechanical and electrical properties, to be tuned in a wide range.

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      High-Performance Flexible Bottom-Gate Organic Field-Effect Transistors with Gravure Printed Thin Organic Dielectric

      Nikolay L. Vaklev, Robert Müller, Beinn V. O. Muir, David T. James, Roger Pretot, Paul van der Schaaf, Jan Genoe, Ji-Seon Kim, Joachim H. G. Steinke and Alasdair J. Campbell

      Article first published online: 28 FEB 2014 | DOI: 10.1002/admi.201300123

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      Gravure-printed dielectric films are presented, which are 100-nm thick, have about 1-nm root mean-square surface roughness and show high electric field strength (>300 MV/m). This dielectric is combined with an ultra-thin—less than 10 nm—layer of poly(α-methylstyrene) on top which gives state-of-the-art field-effect mobility in transistors with thermally-evaporated pentacene (0.6 cm2/Vs) and zone-cast TIPS-pentacene (0.3 cm2/Vs).

    9. Porous Hollow Nanorod Arrays Composed of Alternating Pt and Pd Nanocrystals with Superior Electrocatalytic Activity and Durability for Methanol Oxidation

      Liang-Xin Ding, Chao-Lun Liang, Han Xu, An-Liang Wang, Ye-Xiang Tong and Gao-Ren Li

      Article first published online: 18 FEB 2014 | DOI: 10.1002/admi.201400005

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      The porous hollow nanorod arrays (PHNRAs) composed of alternating Pt and Pd nanocrystals showed superior electrocatalytic performance, such as high catalytic activity and excellent durability toward methanol electro-oxidation. The special surface and heterogeneous interface effects coming from the nanorod arrays, porous and hollow structures, and alternating Pt and Pd nanocrystals of PtPd PHNRAs are responsible for the significantly enhanced catalytic performance.

    10. Low Cost Universal High-k Dielectric for Solution Processing and Thermal Evaporation Organic Transistors

      Zongrong Wang, Xiaochen Ren, Congcheng Fan, Ya-Huei Chang, Hanying Li, Hongzheng Chen, Shien-Ping Feng, Sanqiang Shi and Paddy K. L. Chan

      Article first published online: 27 FEB 2014 | DOI: 10.1002/admi.201300119

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      The surface energy of UV-ozone treated BST dielectric is modulated by the storage duration and environment. By carefully controlling the surface energy, this low temperature, solution processed thin film is employed as the insulator for both thermal evaporated and solution processed OFETs. Both OFETs and saturated load inverters show high mobility and gain with an operating voltage less than 3 V.

    11. Simple Fabrication of Robust Water-Repellent Surfaces with Low Contact-Angle Hysteresis Based on Impregnation

      Alexander Eifert, Dorothea Paulssen, Subramanyan Namboodiri Varanakkottu, Tobias Baier and Steffen Hardt

      Article first published online: 24 MAR 2014 | DOI: 10.1002/admi.201300138

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      A simple method to fabricate water-repellent low-hysteresis surfaces on various substrate materials based on impregnation with silicone oil is demonstrated. The thickness of the lubrication film has negligible influence on the roll-off velocity which is determined by the film viscosity. As possible application thermocapillary transport of water droplets along such surfaces is shown. Corresponding experiments indicate that it is the motion relative to the lubricating film and not the film motion itself that dominates droplet transport.

    12. Molecular Motions Aided Thermally Responsive Biocompatible Textile Pads

      Kadumudi Firoz Babu, Tharangattu N. Narayanan and Manickam Anbu Kulandainathan

      Article first published online: 13 MAR 2014 | DOI: 10.1002/admi.201300139

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      Thermal responsive biocompatible textile pads are prepared via in situ polymerisation of pyrrole on nonwoven viscose rayon (NWVR) fabric. Molecular motions at the interface of PPy and NWVR are responsible for the thermal actuation behaviour. The thermal actuation behaviour of the PPy-NWVR composite and its practical applications in electronic circuits and robotic engineering are successfully demonstrated for the first time.

    13. Ballistic Transport at the Nanometric Inhomogeneities in Au/Nb:SrTiO3 Resistive Switches

      Andrea Gerbi, Renato Buzio, Alessandro Gadaleta, Luca Anghinolfi, Michael Caminale, Emilio Bellingeri, Antonio Sergio Siri and Daniele Marré

      Article first published online: 10 MAR 2014 | DOI: 10.1002/admi.201300057

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      Novel ballistic electron emission microscopy experiments are reported, aimed to directly visualize and quantify the local inhomogeneities of the effective Schottky barrier height on Au/Nb:SrTiO3 Schottky junctions dominated by interfacial resistance switching effects. The voltage-dependent variation of the local barrier height of the nanometric patches could explain the non-ideal behaviour of the resistance switching effects in transition-metal oxide cells.

    14. In Situ Nanoimaging of Photoinduced Charge Separation at the Plasmonic Au Nanoparticle-TiO2 Interface

      Emiko Kazuma and Tetsu Tatsuma

      Article first published online: 25 MAR 2014 | DOI: 10.1002/admi.201400066

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      Photoinduced charge distributions for single Au nanoparticles deposited on single crystalline TiO2 are visualized in situ by Kelvin probe force microscopy. Under UV light, the electrons in excited TiO2 transfer to the Au nanoparticles. In contrast, when the Au nanoparticles are selectively excited by visible-infrared light, electrons are injected from the nanoparticles to TiO2, resulting in plasmon-induced charge separation.

    15. Phase Transfer-Catalyzed Fast CO2 Absorption by MgO-Based Absorbents with High Cycling Capacity

      Keling Zhang, Xiaohong Shari Li, Wei-Zhen Li, Aashish Rohatgi, Yuhua Duan, Prabhakar Singh, Liyu Li and David L. King

      Article first published online: 28 MAR 2014 | DOI: 10.1002/admi.201400030

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      Molten salts facilitate the reaction of CO2 with MgO by providing an alternate pathway to traditional gas-solid reactions. Molten salts partially dissolve bulk MgO and provide activated species accessible to CO2 at gas-solid-liquid triple phase boundaries. This methodology is also applicable to other basic metal oxides and molten salts, inspiring the design of new absorbent systems.

  8. Frontispiece

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      Microspotting: Click-Chemistry Based Multi-Component Microarrays by Quill-Like Pens (Adv. Mater. Interfaces 3/2014)

      Michael Hirtz, Alexandra M. Greiner, Tanja Landmann, Martin Bastmeyer and Harald Fuchs

      Article first published online: 13 JUN 2014 | DOI: 10.1002/admi.201470018

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      Intermediate sized microarrays (spot features with 10 to 20 μm radius) spotted with quill-like microchannel cantilevers and immobilized by clickchemistry reaction are produced with multiplexed components. In article 1300129, Michael Hirtz and co-workers demonstrate the feasibility of such arrays for cell culture applications by applying protein sandwiches that allow for highly selective adhesion of fibroblasts e.g.,for cell arraying purposes.

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    1. Click-Chemistry Based Multi-Component Microarrays by Quill-Like Pens

      Michael Hirtz, Alexandra M. Greiner, Tanja Landmann, Martin Bastmeyer and Harald Fuchs

      Article first published online: 28 FEB 2014 | DOI: 10.1002/admi.201300129

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      Right on the spot: Microarrays in the intermediate size range of 10 to 30 μm spot radius with multiplexed components immobilized by click-chemistry reaction are generated by the use of quill-like pens. The feasibility of these structures for application in (high throughput) cell culture is demonstrated by the highly selective adhesion of fibroblasts to the (protein sandwich-based) microarrays.

    2. One-Pot Process to Control the Elaboration of Non-Wetting Nanofibers

      Thierry Darmanin, Claudio Mortier and Frederic Guittard

      Article first published online: 10 MAR 2014 | DOI: 10.1002/admi.201300094

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      Non-wetting surfaces containing nanofibers of controllable size, length, spacing, and orientation to the surface are developed. Their characteristics and orientation are adjusted by the lengthening of the alkyl chains of electrodeposited poly(3,3-dialkyl-3,4-propylenedioxythiophene).

    3. Influence of Biodopants on PEDOT Biomaterial Polymers: Using QCM-D to Characterize Polymer Interactions with Proteins and Living Cells

      Paul J. Molino, Zhilian Yue, Binbin Zhang, Anthony Tibbens, Xiao Liu, Robert. M. I. Kapsa, Michael J. Higgins and Gordon G. Wallace

      Article first published online: 25 MAR 2014 | DOI: 10.1002/admi.201300122

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      The incorporation of biological dopants into PEDOT conducting polymer biomaterials is shown to significantly alter biologically relevant material physical, mechanical and electrochemical properties. Furthermore, QCM-D analyses reveal the identity of the dopant in the PEDOT biocomposites to considerably alter polymer–protein interactions, as well the adhesion and morphology of PC12 neuronal cells.

    4. Distinct Solid-Electrolyte-Interphases on Sn (100) and (001) Electrodes Studied by Soft X-Ray Spectroscopy

      Ruimin Qiao, Ivan T. Lucas, Altaf Karim, Jaroslaw Syzdek, Xiaosong Liu, Wei Chen, Kristin Persson, Robert Kostecki and Wanli Yang

      Article first published online: 18 FEB 2014 | DOI: 10.1002/admi.201300115

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      The impact of Sn crystal surfaces on the formation, composition and stability of the solid-electrolyte-interphases (SEIs) with the same electrolyte is revealed by soft X-ray absorption spectroscopy. SEI on the (100) surface is conventional porous Li2CO3 from electrolyte decomposition. In sharp contrast, a dense LiF layer dominates the SEI formed on the (001) surface from the decomposition of LiPF6.

    5. Growth Mechanism of Metal Clusters on a Graphene/Ru(0001) Template

      L. Z. Zhang, S. X. Du, J. T. Sun, L. Huang, L. Meng, W. Y. Xu, L. D. Pan, Y. Pan, Y. L. Wang, W. A. Hofer and H.-J. Gao

      Article first published online: 20 FEB 2014 | DOI: 10.1002/admi.201300104

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      The growth mechanism of transition metal atoms on a graphene/metal templates is investigated by using first-principles calculations combined with scanning tunneling microscopy experiments. Both the local sp3 hybridization of the substrate and the occupation of the outermost orbital of the adsorbates determine the interaction between the adsorbates and the graphene/metal, and thus determine the morphology of the adsorbates.

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      Microspotting: Film Structure of Epitaxial Graphene Oxide on SiC: Insight on the Relationship Between Interlayer Spacing, Water Content, and Intralayer Structure (Adv. Mater. Interfaces 3/2014)

      S. Zhou, S. Kim, E. Di Gennaro, Y. Hu, C. Gong, X. Lu, C. Berger, W. de Heer, E. Riedo, Y. J. Chabal, C. Aruta and A. Bongiorno

      Article first published online: 13 JUN 2014 | DOI: 10.1002/admi.201470019

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      A. Bongiorno and co-workers unveil in article 1300106 in a joint experimental and computational study the structural secrets of multilayer graphene oxide obtained from epitaxial graphene on SiC. The ultra-thin films combine a large interlayer spacing, a moderate water content, and large-area graphene sheets presenting an inhomogeneous oxidation at the nanoscale.

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    1. Film Structure of Epitaxial Graphene Oxide on SiC: Insight on the Relationship Between Interlayer Spacing, Water Content, and Intralayer Structure

      S. Zhou, S. Kim, E. Di Gennaro, Y. Hu, C. Gong, X. Lu, C. Berger, W. de Heer, E. Riedo, Y. J. Chabal, C. Aruta and A. Bongiorno

      Article first published online: 25 FEB 2014 | DOI: 10.1002/admi.201300106

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      Graphene oxide obtained by oxidation of multilayer epitaxial graphene presents a high quality film structure, low levels (5–10%) of water trapped into the film, and an interlayer spacing of 9–10 Å.

    2. Atomistic Modeling of Corrosion Resistance: A First Principles Study of O2 Reduction on the Al(111) Surface Covered with a Thin Hydroxylated Alumina Film

      Dominique Costa, Thomas Ribeiro, Francesco Mercuri, Gianfranco Pacchioni and Philippe Marcus

      Article first published online: 19 MAR 2014 | DOI: 10.1002/admi.201300072

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      O2 reduction on oxidized Al is investigated by density functional theory. Realistic models of supported hydroxylated oxide films on Al(111) are built. Ultrathin films (less than 1 nm) are nonprotective. The presence of an Al2O3 inner layer passivates the Al(111) surface. The results help to shed light on the complex reactions responsible for metal corrosion.

    3. Moving Water Droplets Over Nanoscaled (Super) hydrophobic Wettability Contrasts: Experimental Test of a Simple Model Describing Driving Forces

      Tobias Neckernuss, Stefan Wiedemann, Alfred Plettl and Paul Ziemann

      Article first published online: 17 FEB 2014 | DOI: 10.1002/admi.201300033

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      The dynamics of drops on step-like gradients of hydrophobicity is investigated experimentally and compared to a newly developed simple model. (Super)hydrophobic structures are produced via a bottom-up nanolithography approach using the self-organization of precursor loaded micelles further processed to highly ordered arrays of hexagonally arranged nanopillars with all features below 100 nm.

    4. Suppression of Time-Dependent Donor/Acceptor Interface Degradation by Redistributing Donor Charge Density

      Ming-Fai Lo, Tsz-Wai Ng, Hin-Wai Mo, Xian-Feng Chen and Chun-Sing Lee

      Article first published online: 19 FEB 2014 | DOI: 10.1002/admi.201300082

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      The poor stability of a SubPc/C60 solar device is shown by XPS analysis to be caused by a time-dependent chemical reaction at the donor/acceptor interface. A simple and effective solution to suppress such reaction is demonstrated by direct charge manipulation of SubPc donor using nano-island structured molybdenum oxide features.

    5. Surface Energy Engineering in the Solvothermal Deoxidation of Graphene Oxide

      Liangxu Lin, Xuelin Zheng, Shaowei Zhang and Dan A. Allwood

      Article first published online: 18 FEB 2014 | DOI: 10.1002/admi.201300078

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      Graphene oxide (GO) deoxidation in solution is highly sensitive to the solvent surface energy. To overcome many of the problems of dispersibility and inefficient reduction of GO that are usually observed, a surface energy engineering to achieving high yields of monodisperse, deeply deoxidized graphene oxide (GO) in solution is presented.

    6. One-Step Fabrication of Unique Mesoporous NiO Hollow Sphere Film on FTO for High-Performance P-Type Dye-Sensitized Solar Cells

      Hong Bin Yang, Bin Liu, Si Yun Khoo, Lin Nan Zhu, Chun Xian Guo, Yong Qiang Dong and Chang Ming Li

      Article first published online: 17 FEB 2014 | DOI: 10.1002/admi.201300110

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      Hollow NiO spherical structures on fluorine-doped tin oxide substrates are fabricated in a facile and environmentally friendly method. This template-free approach could be universally used to fabricate other nanostructured hollow spheres for a wide range of energy conversion applications such as electrochemical capacitors, chemical sensors, and electrochromic devices.

    7. Self-Propelling and Positioning of Droplets Using Continuous Topography Gradient Surface

      Juan Li, Xuelin Tian, Alexander Pyymaki Perros, Sami Franssila and Ville Jokinen

      Article first published online: 8 FEB 2014 | DOI: 10.1002/admi.201400001

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      A continuous inward wettability gradient is created on a radially patterned surface of uniform surface chemistry. The radial pattern provides a continuous pathway for droplet motion and avoids contact line pinning at geometrical discontinuities. Fast self-propelling of droplets and accurate positioning at the center of the radial pattern is achieved.

    8. Graphoepitaxial Directed Self-Assembly of Polystyrene-Block-Polydimethylsiloxane Block Copolymer on Substrates Functionalized with Hexamethyldisilazane to Fabricate Nanoscale Silicon Patterns

      Dipu Borah, Sozaraj Rasappa, Ramsankar Senthamaraikannan, Justin D. Holmes and Michael A. Morris

      Article first published online: 20 MAR 2014 | DOI: 10.1002/admi.201300102

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      Self-assembly and directed self-assembly based on polystyrene-block-polydimethyl­siloxane (PS-b-PDMS) block copolymer is attractive for nanolithography applications. The interfacial energies at substrate surfaces are engineered with a facile, rapid, and tuneable molecular functionalization approach using hexamethyldisilazane. The hexagonally arranged PDMS cylinders are used as on-chip etch masks to demonstrate pattern transfer to the underlying silicon substrate.

    9. STO/BTO Modulated Superlattice Multilayer Structures with Atomically Sharp Interfaces

      Peter K. Petrov, Bin Zou, Yiqian Wang, James M. Perkins, David W. McComb and Neil McN. Alford

      Article first published online: 28 MAR 2014 | DOI: 10.1002/admi.201300116

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      The analysis of the near interface local chemistry and bonding of modulated nanoscale SrTiO3/BaTiO3 superlattices show that the oxygen K-edges in SrTiO3 and BaTiO3 layers are distinctive and therefore can be used as finger-print signatures. Also, by varying the structure's modulation period it is possible to fabricate dielectric devices with engineered properties and improved thermal stability.

    10. Molecular Structure-Dependent Charge Injection and Doping Efficiencies of Organic Semiconductors: Impact of Side Chain Substitution

      Jinpeng Yang, Yanqing Li, Steffen Duhm, Jianxin Tang, Satoshi Kera and Nobuo Ueno

      Article first published online: 14 MAR 2014 | DOI: 10.1002/admi.201300128

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      Molecular structure dependence of charge injection and doping efficiency are investigated by modifying the typical hole injection/transport material of NPB through side chain substitution. It is demonstrated that even small alkyl chains can induce dramatic impact on the intermolecular orbital energy hybridization at electrode/organic interfaces due to steric hindrance.

    11. High-Temperature Shape Memory Effect in Ti-Ta Thin Films Sputter Deposited at Room Temperature

      Y. Motemani, P. J. S. Buenconsejo, C. Craciunescu and A. Ludwig

      Article first published online: 19 MAR 2014 | DOI: 10.1002/admi.201400019

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      The room temperature fabrication of Ti-Ta thin films showing a reversible martensitic transformation and a high temperature shape memory effect above 200 °C is reported. In contrast to other shape memory thin films, no further heat treatment is necessary to obtain the functional properties.

    12. Simulation-Experimental Approach to Investigate the Role of Interfaces in Self-Replenishing Composite Coatings

      Kateryna Lyakhova, A. Catarina C. Esteves, Marcel W. P. van de Put, Leo G. J. van der Ven, Rolf A. T. M. van Benthem and Gijsbertus de With

      Article first published online: 26 MAR 2014 | DOI: 10.1002/admi.201400053

      Thumbnail image of graphical abstract

      Investigations via a dual simulation-experimental approach self-replenishing on surface-structured composite coatings, containing a cross-linked polymer network with fluorinated-dangling chains and SiO2 nanoparticles incorporated via covalent bonding, reveal the decisive role of polymer/air and polymer/particle interfaces. Coarse-grained simulations provide the minimum polymer layer thickness necessary for providing optimal self-replenishing and the dangling chain distribution profile, both being aspects non-accessible experimentally.

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