Advanced Functional Materials

Cover image for Vol. 23 Issue 13

April 5, 2013

Volume 23, Issue 13

Pages 1605–1723

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      Plasmonic Nanostructures: Tuning Dichroic Plasmon Resonance Modes of Gold Nanoparticles in Optical Thin Films (Adv. Funct. Mater. 13/2013) (page 1605)

      Lola Gonzalez-García, Julian Parra-Barranco, Juan Ramón Sanchez-Valencia, Javier Ferrer, Mari-Cruz Garcia-Gutierrez, Angel Barranco and Agustín R. Gonzalez-Elipe

      Article first published online: 2 APR 2013 | DOI: 10.1002/adfm.201370064

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      On page 1655 Angel Barranco, Agustín R. Gonzalez-Elipe, and co-workers report the synthesis of asymmetric gold plasmonic nanostructures along the tilted intercolumnar space of SiO2 thin films prepared at glancing deposition angles. The film dichroism, evidenced by changing the light polarization and/or sample orientation, can be lithographically removed using a nanosecond laser for the development of advanced optical encryption patterns at micro-macroscales.

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      Stimuli-Responsive Materials: Soft Nanotubes with a Hydrophobic Channel Hybridized with Au Nanoparticles: Photothermal Dispersion/Aggregation Control of C60 in Water (Adv. Funct. Mater. 13/2013) (page 1606)

      Kazuyuki Ishikawa, Naohiro Kameta, Masaru Aoyagi, Masumi Asakawa and Toshimi Shimizu

      Article first published online: 2 APR 2013 | DOI: 10.1002/adfm.201370065

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      Glycolipid-based soft nanotubes with a hydrophilic outer surface and hydrophobic nanochannel encapsulating C60 are reported by Naohiro Kameta and co-workers on page 1677. It is found that the photothermal effect of gold nanoparticles hybridized with the nanotube induces an unfolding of the tubular morphology and leads to compulsive release of C60 in bulk water.

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      Masthead: (Adv. Funct. Mater. 13/2013)

      Article first published online: 2 APR 2013 | DOI: 10.1002/adfm.201370066

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      Contents: (Adv. Funct. Mater. 13/2013) (pages 1607–1611)

      Article first published online: 2 APR 2013 | DOI: 10.1002/adfm.201370067

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    1. A Review of Surface Plasmon Resonance-Enhanced Photocatalysis (pages 1612–1619)

      Wenbo Hou and Stephen B. Cronin

      Article first published online: 30 OCT 2012 | DOI: 10.1002/adfm.201202148

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      In n-type TiO2, a relatively thick film is needed to absorb a majority of the incident light, while the minority carriers (holes) recombine rapidly with the majority carriers (electrons) over a much shorter length scale. Localized plasmonic fields provide a way to mitigate this problem by coupling light very effectively from the far-field to the near-field at the metal oxide/electrolyte interface.

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    1. Top-Down Fabrication of High Quality III–V Nanostructures by Monolayer Controlled Sculpting and Simultaneous Passivation (pages 1620–1627)

      Shagufta Naureen, Naeem Shahid, Reza Sanatinia and Srinivasan Anand

      Article first published online: 26 OCT 2012 | DOI: 10.1002/adfm.201202201

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      A novel post etch chemical process is developed to etch III–V materials with monolayer precision in an inverse epitaxial manner. The process, which also simultaneously passivates the surface, is applied to push the limits of top-down fabrication. InP-based high-optical quality nanowire arrays with aspect ratios more than 50 and nanostructures with new topologies are demonstrated.

    2. Kinetic Isotope Effect in the Hydrogenation and Deuteration of Graphene (pages 1628–1635)

      Alessio Paris, Nikolay Verbitskiy, Alexei Nefedov, Ying Wang, Alexander Fedorov, Danny Haberer, Martin Oehzelt, Luca Petaccia, Dmitry Usachov, Denis Vyalikh, Hermann Sachdev, Christoph Wöll, Martin Knupfer, Bernd Büchner, Lucia Calliari, Lada Yashina, Stephan Irle and Alexander Grüneis

      Article first published online: 2 NOV 2012 | DOI: 10.1002/adfm.201202355

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      Hydrogen and deuterium atoms interact with a graphene monolayer on a Ni/Au substrate. The atoms are either adsorbed on the surface, or reflected, or they can force a previously chemisorbed atom to leave graphene in the form of a gas molecule. The kinetic isotope effect is investigated by time-dependent X-ray photoelectron spectroscopy.

    3. Twinning-, Polytypism-, and Polarity-Induced Morphological Modulation in Nonplanar Nanostructures with van der Waals Epitaxy (pages 1636–1646)

      Muhammad Iqbal Bakti Utama, Maria de la Mata, Cesar Magen, Jordi Arbiol and Qihua Xiong

      Article first published online: 29 OCT 2012 | DOI: 10.1002/adfm.201202027

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      Twinning and polytypism are shown to influence the morphology of van der Waals epitaxial nanostructures. Consequently, the growth of vertically aligned nanorods and epitaxial branched crystals (tripods and tetrapods) from ZnTe can be achieved using only a single type of substrate. Crystalline characterization of the various structures is performed with extensive electron microscopy technqiues and corroborated with atomic models.

    4. Conformal Coating by High Pressure Chemical Deposition for Patterned Microwires of II–VI Semiconductors (pages 1647–1654)

      Justin R. Sparks, Rongrui He, Noel Healy, Subhasis Chaudhuri, Thomas C. Fitzgibbons, Anna C. Peacock, Pier J. A. Sazio and John V. Badding

      Article first published online: 30 OCT 2012 | DOI: 10.1002/adfm.201202224

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      High pressure chemical vapor deposition can deposit conformal films of II–VI semiconductors such as ZnSe, ZnS, and ZnO into very high aspect ratio pores. This process allows for II–VI semiconductors, which cannot be processed into optical fibers with conventional techniques, to be fabricated into step index and microstructured optical fibers.

    5. Tuning Dichroic Plasmon Resonance Modes of Gold Nanoparticles in Optical Thin Films (pages 1655–1663)

      Lola Gonzalez-García, Julian Parra-Barranco, Juan Ramón Sanchez-Valencia, Javier Ferrer, Mari-Cruz Garcia-Gutierrez, Angel Barranco and Agustín R. Gonzalez-Elipe

      Article first published online: 1 NOV 2012 | DOI: 10.1002/adfm.201201900

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      SiO2 thin films prepared at glancing geometries are used as templates to grow gold nanoparticles that depict optical dichroism around the azimuthal and polar axis of the films and yield unprecedented possibilities for the encryption of optical information.

    6. Robust, Self-Healing Superamphiphobic Fabrics Prepared by Two-Step Coating of Fluoro-Containing Polymer, Fluoroalkyl Silane, and Modified Silica Nanoparticles (pages 1664–1670)

      Hua Zhou, Hongxia Wang, Haitao Niu, Adrian Gestos and Tong Lin

      Article first published online: 26 OCT 2012 | DOI: 10.1002/adfm.201202030

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      A superamphiphobic fabric with self-healing ability to autorepair against chemical damage is prepared with a two-step wet-chemistry coating technique using a readily available material system. The coating withstands repeated washing and severe abrasion, as well as strong acid/base, ozone, and boiling treatments.

    7. Highly Sensitive Chemical-Vapor Sensor Based on Thin-Film Organic Field-Effect Transistors with Benzothiadiazole-Fused-Tetrathiafulvalene (pages 1671–1676)

      Ge Yang, Chong-an Di, Guanxin Zhang, Jing Zhang, Junfeng Xiang, Deqing Zhang and Daoben Zhu

      Article first published online: 26 OCT 2012 | DOI: 10.1002/adfm.201202473

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      Organic field-effect transistors based on thin-films of benzothiadiazole-fused-tetrathiafulvalene show fast and sensitive response to chemical vapors of DECP (diethyl chlorophosphate) and POCl3 with the off-current as the output signal.

    8. Soft Nanotubes with a Hydrophobic Channel Hybridized with Au Nanoparticles: Photothermal Dispersion/Aggregation Control of C60 in Water (pages 1677–1683)

      Kazuyuki Ishikawa, Naohiro Kameta, Masaru Aoyagi, Masumi Asakawa and Toshimi Shimizu

      Article first published online: 22 OCT 2012 | DOI: 10.1002/adfm.201202160

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      Self-assembly of simple glycolipids in alcohols, followed by heat treatment with water produces nanotubes that have a hydrophilic outer surface and hydrophobic nanochannel. The nanotubes are able to encapsulate C60 and evenly disperse it in water. The photothermal effect of the AuNPs hybridized with the nanotube induces an unfolding of the tubular morphology, leading to compulsive release and aggregation of C60 in bulk water.

    9. Binary Ferromagnetic Nanostructures: Fabrication, Static and Dynamic Properties (pages 1684–1691)

      Junjia Ding and Adekunle O. Adeyeye

      Article first published online: 26 OCT 2012 | DOI: 10.1002/adfm.201201432

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      The fabrication of large area binary magnetic nanostructures made from one or two ferromagnetic materials (Ni and Ni80Fe20) is reported using a self-aligned shadow deposition technique. Tunable magnetization switching and an adjustable dynamic response is observed for the binary structures. The results are validated by direct domain imaging using magnetic force microscopy and micromagnetic simulations.

    10. Nanoengineered Polypyrrole-Coated Fe2O3@C Multifunctional Composites with an Improved Cycle Stability as Lithium-Ion Anodes (pages 1692–1700)

      Fei Han, Duo Li, Wen-Cui Li, Cheng Lei, Qiang Sun and An-Hui Lu

      Article first published online: 26 OCT 2012 | DOI: 10.1002/adfm.201202254

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      Novel multifunctional composites composed of highly dispersed nanosized Fe2O3 particles, a tubular mesoporous carbon host, and a conductive polypyrrole sealing layer are hierarchically assembled according to the different functions of each component, which are nanoengineered to improve the reversible capacity and cycle stability of Fe2O3-based anodes.

    11. Precise Structural Development and its Correlation to Function in Conjugated Polymer: Fullerene Thin Films by Controlled Solvent Annealing (pages 1701–1710)

      Huipeng Chen, Sheng Hu, Huidong Zang, Bin Hu and Mark Dadmun

      Article first published online: 26 OCT 2012 | DOI: 10.1002/adfm.201202035

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      The impact of controlled solvent vapor exposure on the morphology, structural evolution, and function of solvent-processed poly(3-hexylthiophene):[6,6]-phenyl-C61-butyric acid methyl ester (P3HT:PCBM) bilayers is presented. Scattering intensity increases when a sample is exposed to solvent annealing (SA) for the final 30 min, which is associated with the phase separation of PCBM.

    12. Spray-Coated Silver Nanowires as Top Electrode Layer in Semitransparent P3HT:PCBM-Based Organic Solar Cell Devices (pages 1711–1717)

      Johannes Krantz, Tobias Stubhan, Moses Richter, Stefanie Spallek, Ivan Litzov, Gebhard J. Matt, Erdmann Spiecker and Christoph J. Brabec

      Article first published online: 26 OCT 2012 | DOI: 10.1002/adfm.201202523

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      Silver nanowires (Ag NWs) are introduced as a viable alternative to thermally evaporated silver metal top electrodes. Solution-processable Ag NWs are spray-deposited as highly conductive and transparent electrode layers in semitransparent poly(3-hexylthiophene-2,5-diyl):[6,6]-phenyl-C61-butyric acid methyl ester (P3HT:PCBM) solar cell devices. Their optical properties in semitransparent organic photovoltaic devices are presented and they show comparable performance to reference devices.

    13. Direct Threat of a UV-Ozone Treated Indium-Tin-Oxide Substrate to the Stabilities of Common Organic Semiconductors (pages 1718–1723)

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

      Article first published online: 23 OCT 2012 | DOI: 10.1002/adfm.201202120

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      UV-ozone treated indium tin oxide (ITO) is used extensively in organic electronics. It is shown that UV-ozone treatment can cause potential threats leading to degradation of organic materials. In accelerated degradation tests, rubrene formed on an ITO-free region always shows stronger photoluminescence (PL) emission than a region with an ITO coating. The degradation mechanism for UV-ozone treated ITO is discussed based on the photoemission analysis and device studies.

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