Advanced Materials

Cover image for Vol. 23 Issue 6

February 8, 2011

Volume 23, Issue 6

Pages 683–795

  1. Cover Picture

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Reviews
    6. Communications
    1. Graphene-Based Molecular Devices: A New Approach for Molecular Electronic Junctions with a Multilayer Graphene Electrode (Adv. Mater. 6/2011) (page 683)

      Gunuk Wang, Yonghun Kim, Minhyeok Choe, Tae-Wook Kim and Takhee Lee

      Article first published online: 1 FEB 2011 | DOI: 10.1002/adma.201190009

      Thumbnail image of graphical abstract

      Takhee Lee and co-workers demonstrate on p. 755 a new platform for fabricating reliable solid-state molecular devices using a graphene multilayer as the top electrode. The fabricated devices show a high yield and good junction conductance and exhibit excellent durability, thermal and operational stability, and device lifetime, all of which are crucial for practical application of molecular devices.

  2. Inside Front Cover

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Reviews
    6. Communications
    1. Luminescent Thin Films: Transparent Nanometric Organic Luminescent Films as UV-Active Components in Photonic Structures (Adv. Mater. 6/2011) (page 684)

      Francisco J. Aparicio, Miguel Holgado, Ana Borras, Iwona Blaszczyk-Lezak, Amadeu Griol, Carlos A. Barrios, Rafael Casquel, Francisco J. Sanza, Hans Sohlström, Mikael Antelius, Agustin R. González-Elipe and Angel Barranco

      Article first published online: 1 FEB 2011 | DOI: 10.1002/adma.201190010

      Thumbnail image of graphical abstract

      The inside cover shows two types of photonic structures selectively deposited with a highly fluorescent and transparent organic thin film, as reported by Angel Barranco and co-workers on p. 761. These structures select and couple the green luminescence of the organic film up to the waveguide outputs in the photonic chip edge. The luminescent films are grown by a gentle deposition process fully compatible with sensitive and flexible substrates and easily scalable at the wafer level.

  3. Contents

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Reviews
    6. Communications
    1. Contents: (Adv. Mater. 6/2011) (pages 685–689)

      Article first published online: 1 FEB 2011 | DOI: 10.1002/adma.201190011

  4. Reviews

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Reviews
    6. Communications
    1. Antifouling Coatings: Recent Developments in the Design of Surfaces That Prevent Fouling by Proteins, Bacteria, and Marine Organisms (pages 690–718)

      Indrani Banerjee, Ravindra C. Pangule and Ravi S. Kane

      Article first published online: 30 SEP 2010 | DOI: 10.1002/adma.201001215

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      Strategies to design surfaces that prevent fouling by proteins, bacteria, and marine organisms are reviewed. The two major approaches involve the design of surfaces that resist the attachment of biofoulants or degrade or kill them. Highlighted techniques include PEG-functionalization, surface modification with polycations, photoactivated self-cleaning coatings, coatings that incorporate biocidal agents or enzymes, and the use of structured surfaces.

    2. Applications of Bio-Inspired Special Wettable Surfaces (pages 719–734)

      Xi Yao, Yanlin Song and Lei Jiang

      Article first published online: 6 DEC 2010 | DOI: 10.1002/adma.201002689

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      Recent developments in applications of bio-inspired special wettable surfaces are reviewed. The selected topics are roughly divided into three groups, applications of superhydrophobic surfaces, surfaces of patterned wettability, and integrated multifunctional surfaces and devices. We try to present how the bio-inspired wettability has been integrated into traditional materials or devices to improve their performances and to extend their practical applications by developing new functionalities.

  5. Communications

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Reviews
    6. Communications
    1. Orthogonal Processing and Patterning Enabled by Highly Fluorinated Light-Emitting Polymers (pages 735–739)

      Hon Hang Fong, Jin-Kyun Lee, Yee-Fun Lim, Alexander A. Zakhidov, Wallace W. H. Wong, Andrew B. Holmes, Christopher K. Ober and George G. Malliaras

      Article first published online: 22 NOV 2010 | DOI: 10.1002/adma.201002986

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      We report a family of full-color highly fluorinated light-emitting polymers. The high fluorine content allows the formation of multi-layer devices, which are shown to exhibit emission from the individual layers. A 3 x 3 photoluminescent red-green-blue (RGB) pixel array is also fabricated using standard photolithographic patterning techniques, taking advantage of the robustness of these polymers.

    2. Tailored Highly Transparent Composite Hole-Injection Layer Consisting of Pedot:PSS and SiO2 Nanoparticles for Efficient Polymer Light-Emitting Diodes (pages 740–745)

      Boris Riedel, Yuxin Shen, Julian Hauss, Markus Aichholz, Xiaochen Tang, Uli Lemmer and Martina Gerken

      Article first published online: 15 DEC 2010 | DOI: 10.1002/adma.201003490

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      Nanocomposite organic/inorganic com­pounds are used to fabricate thick, conductive and highly transparent layers, which are used as hole injection and transport layers in OLEDs. The composite layers consist of SiO2-nanoparticles and the polymer PEDOT:PSS. The filling fraction of PEDOT:PSS in these thick layers is reduced to 3.9%. OLEDs comprising such composite layers show an increased outcoupling efficiency.

    3. V2O5 Loaded on SnO2 Nanowires for High-Rate Li Ion Batteries (pages 746–750)

      Jian Yan, Afriyanti Sumboja, Eugene Khoo and Pooi See Lee

      Article first published online: 13 DEC 2010 | DOI: 10.1002/adma.201003805

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      A simple gas-phase-based method is employed to coat V2O5 on SnO2 nanowires. An electrode made from the SnO2/V2O5 core/shell-nanowires delivers a high power density of about 60 kW kg−1 while the energy density remains 282 W h kg−1. In addition, the electrode exhibits very-good cycling stability. Such good performance shows very-promising potential in the application of a high-rate lithium battery.

    4. p- and n-Type Bipolar Redox-Active Radical Polymer: Toward Totally Organic Polymer-Based Rechargeable Devices with Variable Configuration (pages 751–754)

      Takeo Suga, Shuhei Sugita, Hiroki Ohshiro, Kenichi Oyaizu and Hiroyuki Nishide

      Article first published online: 13 DEC 2010 | DOI: 10.1002/adma.201003525

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      The p- and n-type bipolar redox-active radical polymer with a nitronylnitroxyl group, poly(nitronylnitroxylstyrene), expands its utilization as a cathode- or anode-active material in organic polymer-based rechargeable devices with two unprecedented configurations: a poleless battery and a “rocking-chair type” battery. These batteries exhibit remarkably high power rate capability (chargeable within 20 s) and high cycle performance.

    5. A New Approach for Molecular Electronic Junctions with a Multilayer Graphene Electrode (pages 755–760)

      Gunuk Wang, Yonghun Kim, Minhyeok Choe, Tae-Wook Kim and Takhee Lee

      Article first published online: 17 DEC 2010 | DOI: 10.1002/adma.201003178

      Thumbnail image of graphical abstract

      A new technology for the fabrication of reliable solid-state molecular devices using a graphene multilayer as the top electrode is introduced. Graphene-electrode molecular devices were fabricated in high yield with good junction conductance. These devices also have excellent durabilities, thermal and operational stabilities, and device lifetimes.

    6. Transparent Nanometric Organic Luminescent Films as UV-Active Components in Photonic Structures (pages 761–765)

      Francisco J. Aparicio, Miguel Holgado, Ana Borras, Iwona Blaszczyk-Lezak, Amadeu Griol, Carlos A. Barrios, Rafael Casquel, Francisco J. Sanza, Hans Sohlström, Mikael Antelius, Agustin R. González-Elipe and Angel Barranco

      Article first published online: 15 DEC 2010 | DOI: 10.1002/adma.201003088

      Thumbnail image of graphical abstract

      A new kind of visible-blind organic thin-film material, consisting of a polymeric matrix with a high concentration of embedded 3-hydroxyflavone (3HF) dye molecules, that absorbs UV light and emits green light is presented. The thin films can be grown on sensitive substrates, including flexible polymers and paper. Their suitability as photonic active components photonic devices is demonstrated.

    7. Morphology of All-Solution-Processed “Bilayer” Organic Solar Cells (pages 766–770)

      Kwan H. Lee, Paul E. Schwenn, Arthur R. G. Smith, Hamish Cavaye, Paul E. Shaw, Michael James, Karsten B. Krueger, Ian R. Gentle, Paul Meredith and Paul L. Burn

      Article first published online: 9 DEC 2010 | DOI: 10.1002/adma.201003545

      Thumbnail image of graphical abstract

      We investigate the evolution of the vertical morphology in a solution-processed P3HT/PCBM “bilayer” organic solar cell using a combination of techniques, including neutron reflectometry. By correlating the device performance with the active layer morphology, we establish that the solution processed bilayer concept is a misnomer and sequential solution processing is an elegant way to make bulk heterojunction organic solar cells with high efficiency.

    8. Growth of Directly Transferable In2O3 Nanowire Mats for Transparent Thin-film Transistor Applications (pages 771–775)

      Guozhen Shen, Jing Xu, Xianfu Wang, Hongtao Huang and Di Chen

      Article first published online: 8 DEC 2010 | DOI: 10.1002/adma.201003474

      Thumbnail image of graphical abstract

      Peeling off nanowire mats with tweezers? Directly transferable In2O3 nanowire mats are synthesized via a simple laser-ablation chemical vapor deposition method (see figure). The mats are used as active channels to make transparent thin-film transistors with high performance.

    9. An Electrochemical Avenue to Green-Luminescent Graphene Quantum Dots as Potential Electron-Acceptors for Photovoltaics (pages 776–780)

      Yan Li, Yue Hu, Yang Zhao, Gaoquan Shi, Lier Deng, Yanbing Hou and Liangti Qu

      Article first published online: 15 DEC 2010 | DOI: 10.1002/adma.201003819

      Thumbnail image of graphical abstract

      Green-luminescent functional graphene quantum dots (GQDs) are prepared by a facile electrochemical approach. The GQDs are rich in oxygen-containing functional groups and soluble in aqueous or organic media, facilitating further functionalization and various applications. Polymer photovoltaic devices using GQDs as a new type of electron-acceptor material are also demonstrated.

    10. Block Copolymer Nanotubes by Melt-infiltration of Nanoporous Aluminum Oxide (pages 781–786)

      Bhanuprathap Pulamagatta, Man Yan Eric Yau, Ilja Gunkel, Thomas Thurn-Albrecht, Klaus Schröter, Dirk Pfefferkorn, Jörg Kressler, Martin Steinhart and Wolfgang H. Binder

      Article first published online: 22 DEC 2010 | DOI: 10.1002/adma.201003958

    11. Doxorubicin Release Triggered by Alginate Embedded Magnetic Nanoheaters: A Combined Therapy (pages 787–790)

      Séverine Brulé, Michael Levy, Claire Wilhelm, Didier Letourneur, Florence Gazeau, Christine Ménager and Catherine Le Visage

      Article first published online: 9 DEC 2010 | DOI: 10.1002/adma.201003763

      Thumbnail image of graphical abstract

      Alginate microbeads with iron oxide nanoparticle heaters that carry doxo-rubicin are investigated in vitro for simultaneous drug targeting and local heat generation (hyperthermia). Application of an alternative magnetic field (AMF) causes magnetic-hyperthermia-enhanced doxorubicin release. The AMF-triggered drug release and hyperthermia exhibit synergistic effects and result in significant tumor cell death.

    12. High-Performance Supercapacitors Based on Intertwined CNT/V2O5 Nanowire Nanocomposites (pages 791–795)

      Zheng Chen, Veronica Augustyn, Jing Wen, Yuewei Zhang, Meiqing Shen, Bruce Dunn and Yunfeng Lu

      Article first published online: 15 DEC 2010 | DOI: 10.1002/adma.201003658

      Thumbnail image of graphical abstract

      High-performance asymmetric super-capacitors containing thick-film electrodes (over 100 μm thick) made of CNT/V2O5 nanowire composite are designed. The excellent conductivity, high specific capacitance, and a large voltage window of the CNT/V2O5 nanocomposite enable the fabrication of devices with high energy and high power densities. Moreover, the resulting devices exhibit excellent cycling stability. This supercapacitor approach may be attractive for a wide range of device applications.

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