Advanced Materials

Cover image for Vol. 26 Issue 4

January 29, 2014

Volume 26, Issue 4

Pages 505–659

  1. Cover Picture

    1. Top of page
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    3. Inside Front Cover
    4. Inside Back Cover
    5. Back Cover
    6. Masthead
    7. Contents
    8. Progress Report
    9. Reviews
    10. Communications
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      Gelation: Three-Dimensional Shape Engineered, Interfacial Gelation of Reduced Graphene Oxide for High Rate, Large Capacity Supercapacitors (Adv. Mater. 4/2014) (page 505)

      Uday Narayan Maiti, Joonwon Lim, Kyung Eun Lee, Won Joon Lee and Sang Ouk Kim

      Article first published online: 23 JAN 2014 | DOI: 10.1002/adma.201470022

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      Layer-by-layer gelation of reduced graphene oxide through spontaneous reduction at a metal surface is developed by S. O. Kim and co-workers on page 615. This allows 3D shape engineering and arbitrary scaling up, according to need. Gel sheets with a porous hydrated network show excellent energy-storage performances when they are used as supercapacitor electrodes, demonstrating a high areal capacity as well as a high rate capability.

  2. Inside Front Cover

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Inside Back Cover
    5. Back Cover
    6. Masthead
    7. Contents
    8. Progress Report
    9. Reviews
    10. Communications
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      Biomedical Applications: Tunable Delivery of siRNA from a Biodegradable Scaffold to Promote Angiogenesis In Vivo (Adv. Mater. 4/2014) (page 506)

      Christopher E. Nelson, Arnold J. Kim, Elizabeth J. Adolph, Mukesh K. Gupta, Fang Yu, Kyle M. Hocking, Jeffrey M. Davidson, Scott A. Guelcher and Craig L. Duvall

      Article first published online: 23 JAN 2014 | DOI: 10.1002/adma.201470023

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      On page 607, C. L. Duvall and co-workers detail a new technology for sustained, local delivery of siRNA. The authors apply this platform to manipulate activity of a pro-angiogenic transcription factor, which orchestrates robust biomaterial scaffold neovascularization in vivo. This system may provide a superior approach to traditional pro-angiogenic therapies and holds promise for broader application in regenerative medicine.

  3. Inside Back Cover

    1. Top of page
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    5. Back Cover
    6. Masthead
    7. Contents
    8. Progress Report
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    10. Communications
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      Nanowires: Optical Wavelength Filters Based on Photonic Confinement in Semiconductor Nanowire Homojunctions (Adv. Mater. 4/2014) (page 663)

      Jian Ye, Chuang Zhang, Chang-Ling Zou, Yongli Yan, Jianmin Gu, Yong Sheng Zhao and Jiannian Yao

      Article first published online: 23 JAN 2014 | DOI: 10.1002/adma.201470026

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      Semiconductor nanowire homojunctions are grown via a homoepitaxial regrowth method in a chemical vapor deposition system by J. Yao, Y. S. Shao and co-workers on page 620. In a single nanowire homojunction, the channel with the larger diameter permits the propagation of multi-wavelengths of light, whereas the channel with the smaller diameter only confines light with a short wavelength and filters out the long wavelengths, which can be coupled out with a nanowire crossed junction. Through integrating homo- and crossed junctions into the nanowire network, the multi-channel wavelength filters would be realized for light signal processing in the integrated nanophotonics.

  4. Back Cover

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Inside Back Cover
    5. Back Cover
    6. Masthead
    7. Contents
    8. Progress Report
    9. Reviews
    10. Communications
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      Batteries: A Graphene–Pure-Sulfur Sandwich Structure for Ultrafast, Long-Life Lithium–Sulfur Batteries (Adv. Mater. 4/2014) (page 664)

      Guangmin Zhou, Songfeng Pei, Lu Li, Da-Wei Wang, Shaogang Wang, Kun Huang, Li-Chang Yin, Feng Li and Hui-Ming Cheng

      Article first published online: 23 JAN 2014 | DOI: 10.1002/adma.201470027

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      On page 625, H.-M. Cheng, F. Li and co-workers describe the design of a unique sandwich structure with pure sulfur between two graphene membranes that are continuously produced over a large area, as a very simple but effective approach for the fabrication of Li–S batteries with ultrafast charge/discharge rates and long-life. The simple structure, large-area fabrication and superior performance indicate that this sulfur electrode design can be easily scaled up for industrial manufacturing. Image courtesy of Yan Liang.

  5. Masthead

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    1. Masthead: (Adv. Mater. 4/2014)

      Article first published online: 23 JAN 2014 | DOI: 10.1002/adma.201470025

  6. Contents

    1. Top of page
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    5. Back Cover
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    7. Contents
    8. Progress Report
    9. Reviews
    10. Communications
    1. Contents: (Adv. Mater. 4/2014) (pages 507–511)

      Article first published online: 23 JAN 2014 | DOI: 10.1002/adma.201470024

  7. Progress Report

    1. Top of page
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    3. Inside Front Cover
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    5. Back Cover
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    7. Contents
    8. Progress Report
    9. Reviews
    10. Communications
    1. 25th Anniversary Article: Charge Transport and Recombination in Polymer Light-Emitting Diodes (pages 512–531)

      Martijn Kuik, Gert-Jan A. H. Wetzelaer, Herman T. Nicolai, N. Irina Craciun, Dago M. De Leeuw and Paul W. M. Blom

      Article first published online: 23 JAN 2014 | DOI: 10.1002/adma.201303393

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      The basic physical processes of charge transport and charge recombination in organic semiconductors are reviewed. Both these processes are negatively influenced by the universal presence of electron traps, hindering transport and inducing a non-radiative recombination channel. The recombination via electron traps is governed by the diffusion of a hole towards a trapped electron. As a result from charge-transport measurements the recombination in organic semiconductors can be fully predicted.

  8. Reviews

    1. Top of page
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    1. You have full text access to this OnlineOpen article
      25th Anniversary Article: Ordered Polymer Structures for the Engineering of Photons and Phonons (pages 532–569)

      Jae-Hwang Lee, Cheong Yang Koh, Jonathan P. Singer, Seog-Jin Jeon, Martin Maldovan, Ori Stein and Edwin L. Thomas

      Article first published online: 12 DEC 2013 | DOI: 10.1002/adma.201303456

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      Polymer-centric photonic and phononic crystals are reviewed focusing on basic concepts, design and fabrication techniques, functional polymers, applications, and emerging ideas. Polymer-based photonic crystals will become more critical in sensing, energy, and display applications while polymer-based phononic crystals are expected to be a superior materials platform for manipulating elastic waves over many length scales due to the wide range of applications and relative ease of opening complete bandgaps.

    2. Polymer-Based Resistive Memory Materials and Devices (pages 570–606)

      Wen-Peng Lin, Shu-Juan Liu, Tao Gong, Qiang Zhao and Wei Huang

      Article first published online: 16 DEC 2013 | DOI: 10.1002/adma.201302637

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      In this review we introduce the general characteristics of the device structures and fabrication, memory effects, and switching mechanisms of polymer-based resistive memory devices. Subsequently, the research progress concerning the use of single polymers or polymer composites as active materials for resistive memory devices are summarized. Finally, current challenges and future research directions in this field are discussed.

  9. Communications

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Inside Back Cover
    5. Back Cover
    6. Masthead
    7. Contents
    8. Progress Report
    9. Reviews
    10. Communications
    1. Tunable Delivery of siRNA from a Biodegradable Scaffold to Promote Angiogenesis In Vivo (pages 607–614)

      Christopher E. Nelson, Arnold J. Kim, Elizabeth J. Adolph, Mukesh K. Gupta, Fang Yu, Kyle M. Hocking, Jeffrey M. Davidson, Scott A. Guelcher and Craig L. Duvall

      Article first published online: 16 DEC 2013 | DOI: 10.1002/adma.201303520

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      A system is engineered for temporally controlled delivery of siRNA from biodegradable tissue regenerative scaffolds. Therapeutic application of this approach to silence PHD2 promotes expression of pro-angiogenic genes controlled by HIF1α and enhanced scaffold vascularization in vivo. This technology provides a new standard for efficient and controllable gene silencing to modulate host response within regenerative biomaterials.

    2. Three-Dimensional Shape Engineered, Interfacial Gelation of Reduced Graphene Oxide for High Rate, Large Capacity Supercapacitors (pages 615–619)

      Uday Narayan Maiti, Joonwon Lim, Kyung Eun Lee, Won Joon Lee and Sang Ouk Kim

      Article first published online: 18 OCT 2013 | DOI: 10.1002/adma.201303503

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      Site specific electroless gelation enables straightforward solution processing of graphene gel films with ultimate scalability and three-dimensional shape engineering. Due to the synergistic combination of open porous structure and highly electro-conductivity graphene gel framework, shape engineered gel films could be exploited for high performance supercapacitor electrode and achieved large energy capacity and high power density, simultaneously.

    3. Optical Wavelength Filters Based on Photonic Confinement in Semiconductor Nanowire Homojunctions (pages 620–624)

      Jian Ye, Chuang Zhang, Chang-Ling Zou, Yongli Yan, Jianmin Gu, Yong Sheng Zhao and Jiannian Yao

      Article first published online: 5 DEC 2013 | DOI: 10.1002/adma.201303482

      Thumbnail image of graphical abstract

      An optical wavelength filter at the nanoscale can be fabricated with semiconductor nanowire homojunctions based on photonic confinement in the nanowire channels with different diameters. By assembling the nanowire homojunctions with short-pass functions, and crossed junctions with long-pass functions, multichannel wavelength filters are set up for dividing the UV and visible green light signals and route them into the designated output ports.

    4. A Graphene–Pure-Sulfur Sandwich Structure for Ultrafast, Long-Life Lithium–Sulfur Batteries (pages 625–631)

      Guangmin Zhou, Songfeng Pei, Lu Li, Da-Wei Wang, Shaogang Wang, Kun Huang, Li-Chang Yin, Feng Li and Hui-Ming Cheng

      Article first published online: 4 NOV 2013 | DOI: 10.1002/adma.201302877

      Thumbnail image of graphical abstract

      A unique sandwich structure is designed with pure sulfur between two graphene membranes, which are continuously produced over a large area, as a very simple but effective approach for the fabrication of Li–S batteries with ultrafast charge/discharge rates and long lifetimes.

    5. Highly Transparent and Conductive ZnO: Al Thin Films from a Low Temperature Aqueous Solution Approach (pages 632–636)

      Harald Hagendorfer, Karla Lienau, Shiro Nishiwaki, Carolin M. Fella, Lukas Kranz, Alexander R. Uhl, Dominik Jaeger, Li Luo, Christina Gretener, Stephan Buecheler, Yaroslav E. Romanyuk and Ayodhya N. Tiwari

      Article first published online: 22 OCT 2013 | DOI: 10.1002/adma.201303186

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      A solution deposition approach for high-performance aluminum-doped zinc oxide (AZO) thin films (visible transparency > 90% and sheet resistance down to 25 Ω/sq) with process temperatures not exceeding 85 °C is presented. This allows the non-vacuum deposition of AZO on temperature sensitive substrates such as polymer films for flexible and transparent electronics, or inorganic and organic thin film photovoltaics.

    6. A Simple Method for Cleaning Graphene Surfaces with an Electrostatic Force (pages 637–644)

      Won Jin Choi, Yoon Jang Chung, Serin Park, Cheol-Soo Yang, Young Kuk Lee, Ki-Seok An, You-Seop Lee and Jeong-O Lee

      Article first published online: 22 OCT 2013 | DOI: 10.1002/adma.201303199

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      A facile method involving electrostatic forces is used to clean graphene surfaces that have been prepared through chemical vapor deposition (CVD). In this electrostatic-force cleaning (EFC) method, extremely fine cloth fibers are rubbed against CVD-grown graphene, in order to remove residual poly(methyl methacrylate) (PMMA), known as "PMMA-G," without damaging the graphene surface.

    7. Scalable Fabrication of Ambipolar Transistors and Radio-Frequency Circuits Using Aligned Carbon Nanotube Arrays (pages 645–652)

      Zhenxing Wang, Shibo Liang, Zhiyong Zhang, Honggang Liu, Hua Zhong, Lin-Hui Ye, Sheng Wang, Weiwei Zhou, Jie Liu, Yabin Chen, Jin Zhang and Lian-Mao Peng

      Article first published online: 23 OCT 2013 | DOI: 10.1002/adma.201302793

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      Field-effect transistors (FETs) are fabricated on a large scale and with a high yield of over 95% based on aligned carbon nanotube arrays directly grown on quartz, and exhibit ambipolar transfer characteristics that can be used to construct ambipolar RF circuits. RF circuits including frequency doubler and mixer based on the ambipolar FETs demonstrate unequivocally working frequency up to 40 GHz.

    8. Using DNA to Design Plasmonic Metamaterials with Tunable Optical Properties (pages 653–659)

      Kaylie L. Young, Michael B. Ross, Martin G. Blaber, Matthew Rycenga, Matthew R. Jones, Chuan Zhang, Andrew J. Senesi, Byeongdu Lee, George C. Schatz and Chad A. Mirkin

      Article first published online: 25 OCT 2013 | DOI: 10.1002/adma.201302938

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      Epsilon-near-zero behavior and an optically metallic response are predicted using electrodynamics simulations in superlattices comprising silver nanoparticles. Programmable DNA-mediated assembly is used to synthesize both silver and binary silver–gold nanoparticle superlattices, which are characterized using small-angle X-ray scattering, transmission electron microscopy, and elemental mapping.

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