Advanced Materials

Cover image for Vol. 24 Issue 33

August 28, 2012

Volume 24, Issue 33

Pages 4465–4586

  1. Cover Picture

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Back Cover
    5. Masthead
    6. Contents
    7. Review
    8. Communications
    1. Printable Electronics: Printable Giant Magnetoresistive Devices (Adv. Mater. 33/2012) (page 4465)

      Daniil Karnaushenko, Denys Makarov, Chenglin Yan, Robert Streubel and Oliver G. Schmidt

      Version of Record online: 20 AUG 2012 | DOI: 10.1002/adma.201290198

      Thumbnail image of graphical abstract

      The first printable magnetic sensor that relies on the giant magnetoresistance effect (GMR) is fabricated. The magnetic ink can be painted on virtually any substrate such as paper, polymers, ceramics, and glass and exhibits a room-temperature GMR of up to 8%. The functionality of a magnetic switch printed on a postcard paves the way for interactive and fully printable electronics. Further details can be found on page 4518 in the article by D. Makarov and co-workers.

  2. Inside Front Cover

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Back Cover
    5. Masthead
    6. Contents
    7. Review
    8. Communications
    1. Energy Storage: Templated Nanocarbons for Energy Storage (Adv. Mater. 33/2012) (page 4466)

      Hirotomo Nishihara and Takashi Kyotani

      Version of Record online: 20 AUG 2012 | DOI: 10.1002/adma.201290199

      Thumbnail image of graphical abstract

      On page 4473, T. Kyotani and H. Nishihara review the use of templated nanocarbons for energy storage. The cover image depicts the use of zeolite-templated carbon, one of the representative templated nanocarbons, for energy storage: blue spheres represent gas molecules or ions, yellow lightning represents electricity. The back-ground is an image of the sunrise, symbolizing future developments in the field of templated nanocarbons.

  3. Back Cover

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Back Cover
    5. Masthead
    6. Contents
    7. Review
    8. Communications
    1. Solar Cells: High Efficiency Inorganic/Organic Hybrid Tandem Solar Cells (Adv. Mater. 33/2012) (page 4587)

      Ji Hoon Seo, Dong-Ho Kim, Se-Hun Kwon, Myungkwan Song, Min-Seung Choi, Seung Yoon Ryu, Hyung Woo Lee, Yun Chang Park, Jung-Dae Kwon, Kee-Seok Nam, Yongsoo Jeong, Jae-Wook Kang and Chang Su Kim

      Version of Record online: 20 AUG 2012 | DOI: 10.1002/adma.201290200

      Thumbnail image of graphical abstract

      High-performance inorganic/organic hybrid tandem solar cells are designed and fabricated by C. S. Kim, J.-W. Kang, and co-workers on page 4523. This research opens up a new direction towards the achievement of a universal optimal device layout and provides the potential to further enhance the efficiency of future hybrid tandem solar cells.

  4. Masthead

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Back Cover
    5. Masthead
    6. Contents
    7. Review
    8. Communications
    1. Masthead: (Adv. Mater. 33/2012)

      Version of Record online: 20 AUG 2012 | DOI: 10.1002/adma.201290201

  5. Contents

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Back Cover
    5. Masthead
    6. Contents
    7. Review
    8. Communications
  6. Review

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Back Cover
    5. Masthead
    6. Contents
    7. Review
    8. Communications
    1. Templated Nanocarbons for Energy Storage (pages 4473–4498)

      Hirotomo Nishihara and Takashi Kyotani

      Version of Record online: 16 JUL 2012 | DOI: 10.1002/adma.201201715

      Thumbnail image of graphical abstract

      Templated nanocarbons are characterized by extraordinarily unique and/or ordered structures that can never be produced by any of the conventional methods for carbon production. This Review reveals the true value of templated nanocarbons used for energy storage applications, such as hydrogen storage, electrochemical capacitors, and lithium-ion batteries.

  7. Communications

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Back Cover
    5. Masthead
    6. Contents
    7. Review
    8. Communications
    1. Transfer-Printing of As-Fabricated Carbon Nanotube Devices onto Various Substrates (pages 4499–4504)

      Quy Nguyen Thanh, Huiseong Jeong, Jinwoong Kim, J. W. Kevek, Y. H. Ahn, Soonil Lee, Ethan D. Minot and Ji-Yong Park

      Version of Record online: 28 JUN 2012 | DOI: 10.1002/adma.201201794

      Thumbnail image of graphical abstract

      Exact replicas of carbon nanotube devices as fabricated on SiO2/Si substrates are prepared on various non-conventional substrates such as nonplanar or soft substrates (see images) by a simple, yet versatile, transfer-printing “cut-and-paste” method. In this way, harsh growth and fabrication processes can be minimized on the target substrates. The electrical characteristics of transfer-printed devices are compared to those of original devices.

    2. Post-Deposition Treatment of an Arylated-Carbazole Conjugated Polymer for Solar Cell Fabrication (pages 4505–4510)

      Xiaofeng Liu, Wen Wen and Guillermo C. Bazan

      Version of Record online: 21 JUN 2012 | DOI: 10.1002/adma.201201567

      Thumbnail image of graphical abstract

      An arylated-carbazole conjugated polymer with a deep HOMO level has been developed. Solar cells based on blends of PCX3 and PC71BM show efficiency of 3.9% with a Voc of 0.96 V. The device performance can be improved to 5.1% by using polar solvent treatment, most likely as a result of modified interfacial properties.

    3. Biofunctional Electrolyte-Gated Organic Field-Effect Transistors (pages 4511–4517)

      Felix Buth, Andreas Donner, Matthias Sachsenhauser, Martin Stutzmann and Jose A. Garrido

      Version of Record online: 3 JUL 2012 | DOI: 10.1002/adma.201201841

      Thumbnail image of graphical abstract

      The surface modification of solution-gated organic field-effect transistors is investigated. The introduction of different surface groups leads to a control of the pH sensitivity, determined by the pKa value of the added surface moiety. Together with the successful demonstration of enzyme modification of the surface, this work reveals the large potential of organic SGFETs for biosensor applications.

    4. Printable Giant Magnetoresistive Devices (pages 4518–4522)

      Daniil Karnaushenko, Denys Makarov, Chenglin Yan, Robert Streubel and Oliver G. Schmidt

      Version of Record online: 3 JUL 2012 | DOI: 10.1002/adma.201201190

      Thumbnail image of graphical abstract

      The first printable magnetic sensor relying on the giant magnetoresistance effect (GMR) is demonstrated. It is prepared in the form of magneto-sensitive inks adherent to any kind of arbitrarily shaped surface. The fabricated sensor exhibits a room-temperature GMR of up to 8% showing great potential for contactless switching in hybrid electronic circuits (discrete semiconductor and printable elements) applied to the surface by regular painting.

    5. High Efficiency Inorganic/Organic Hybrid Tandem Solar Cells (pages 4523–4527)

      Ji Hoon Seo, Dong-Ho Kim, Se-Hun Kwon, Myungkwan Song, Min-Seung Choi, Seung Yoon Ryu, Hyung Woo Lee, Yun Chang Park, Jung-Dae Kwon, Kee-Seok Nam, Yongsoo Jeong, Jae-Wook Kang and Chang Su Kim

      Version of Record online: 16 JUL 2012 | DOI: 10.1002/adma.201201419

      Thumbnail image of graphical abstract

      Hybrid tandem solar cells comprising an inorganic bottom cell and an organic top cell have been designed and fabricated. The interlayer combination and thickness matching were optimized in order to increase the overall photovoltaic conversion efficiency. A maximum power conversion efficiency of 5.72% was achieved along with a Voc of 1.42 V, reaching as high as 92% of the sum of the subcell Voc values.

    6. Anisotropic Photoresponse Properties of Single Micrometer-Sized GeSe Nanosheet (pages 4528–4533)

      Ding-Jiang Xue, Jiahui Tan, Jin-Song Hu, Wenping Hu, Yu-Guo Guo and Li-Jun Wan

      Version of Record online: 16 JUL 2012 | DOI: 10.1002/adma.201201855

      Thumbnail image of graphical abstract

      Micrometer-sized single-crystal GeSe nanosheets have been synthesized by a solution method. The single GeSe nanosheet exhibits novel anisotropic photoresponse properties in two photodetectors based on individual nanosheet. The on/off switching ratio of the photodetector perpendicular to the nanosheet is 3.5 times higher than that parallel to the nanosheet.

    7. Grafted Crystalline Poly-Perfluoroacrylate Structures for Superhydrophobic and Oleophobic Functional Coatings (pages 4534–4539)

      Anna Maria Coclite, Yujun Shi and Karen K. Gleason

      Version of Record online: 12 JUL 2012 | DOI: 10.1002/adma.201200682

      Thumbnail image of graphical abstract

      This report describes the preparation of superhydrophobic and oleophobic surfaces by grafting of poly(perfluorodecylacrylate) chains with initiated chemical vapor deposition on silicon substrates. The grafting enhances the formation of a semicrystalline phase. The crystalline structures reduce the polymer chain mobility, resulting in nonwetting surfaces with both water and mineral oil. On the contrary, the same contacting liquid easily wets the amorphous ungrafted polymer.

    8. High Performance AC Electroluminescence from Colloidal Quantum Dot Hybrids (pages 4540–4546)

      Sung Hwan Cho, Jinwoo Sung, Ihn Hwang, Richard Hahnkee Kim, Yeon Sik Choi, Seoung Soon Jo, Tae Woo Lee and Cheolmin Park

      Version of Record online: 12 JUL 2012 | DOI: 10.1002/adma.201201524

      Thumbnail image of graphical abstract

      High performance field-induced AC electroluminescence (EL) in a simple ITO/insulator/hybrid emitter/Au structure was demonstrated with efficient control of the brightness and colors based on solution-processed nanohybrids of CdSe-ZnS core-shell colloidal quantum dots and fluorescent polymers.

    9. Multifunctional L10-Mn1.5Ga Films with Ultrahigh Coercivity, Giant Perpendicular Magnetocrystalline Anisotropy and Large Magnetic Energy Product (pages 4547–4551)

      Lijun Zhu, Shuaihua Nie, Kangkang Meng, Dong Pan, Jianhua Zhao and Houzhi Zheng

      Version of Record online: 20 JUL 2012 | DOI: 10.1002/adma.201200805

      Thumbnail image of graphical abstract

      A new kind of multifunctional L10-Mn1.5Ga film is demonstrated for the first time. These MBE-grown epitaxial films exhibit pronounced magnetic properties at room temperature, including ultrahigh perpendicular coercivity up to 42.8 kOe, giant perpendicular magnetic anisotropy with a maximum of 21.7 Merg/cm3 and large magnetic energy products up to 2.60 MGOe, which allow various applications in ultrahigh density recording, spintronics, and permanent magnets.

    10. Direct Observation of Charge Transfer in Solid Electrolyte for Electrochemical Metallization Memory (pages 4552–4556)

      Deok-Yong Cho, Ilia Valov, Jan van den Hurk, Stefan Tappertzhofen and Rainer Waser

      Version of Record online: 12 JUL 2012 | DOI: 10.1002/adma.201201499

      Thumbnail image of graphical abstract

      X-ray absorption spectroscopy study on an electrochemical metallization cell of GeSx:Ag shows clear experimental evidence of chemical ionization of the active metal atoms (Ag) and consequent transfer of charge to the electrolyte (GeSx). The valence electron density and its change upon the Ag intercalation are depicted schematically as transparent waves on the Ge-S bond structure in amorphous GeSx.

    11. Liquid Viruses by Nanoscale Engineering of Capsid Surfaces (pages 4557–4563)

      Avinash J. Patil, Nina McGrath, J. Elaine Barclay, David J. Evans, Helmut Cölfen, Ian Manners, Adam W. Perriman and Stephen Mann

      Version of Record online: 16 JUL 2012 | DOI: 10.1002/adma.201201032

      Thumbnail image of graphical abstract

      Surface engineering of plant virus capsids via cationization (1) and stoichiometric coupling of a polymer surfactant coronal layer (2) produces a highly concentrated, solvent-free liquid virus at 28 °C. These ionic bionanoconstructs are viscoelastic, retain plant infectivity and can be dispersed in a range of organic solvents for aerosol delivery.

    12. Local Conduction at the BiFeO3-CoFe2O4 Tubular Oxide Interface (pages 4564–4568)

      Ying-Hui Hsieh, Jia-Ming Liou, Bo-Chao Huang, Chen-Wei Liang, Qing He, Qian Zhan, Ya-Ping Chiu, Yi-Chun Chen and Ying-Hao Chu

      Version of Record online: 13 JUL 2012 | DOI: 10.1002/adma.201201929

      Thumbnail image of graphical abstract

      In strongly correlated oxides, heterointerfaces, manipulating the interaction, frustration, and discontinuity of lattice, charge, orbital, and spin degrees of freedom, generate new possibilities for next generation devices. In this study, existing oxide heterostructures are examined and local conduction at the BiFeO3-CoFe2O4 vertical interface is found. In such hetero-nanostructures the interface cannot only be the medium for the coupling between phases, but also a new state of the matter. This study demonstrates a novel concept on for oxide interface design and opens an alternative pathway for the exploration of diverse functionalities in complex oxide interfaces.

    13. Graphene Hydrogels Deposited in Nickel Foams for High-Rate Electrochemical Capacitors (pages 4569–4573)

      Ji Chen, Kaixuan Sheng, Peihui Luo, Chun Li and Gaoquan Shi

      Version of Record online: 12 JUL 2012 | DOI: 10.1002/adma.201201978

      Thumbnail image of graphical abstract

      Graphene hydrogel/nickel foam composite electrodes for high-rate electrochemical capacitors are produced by reduction of an aqueous dispersion of graphene oxide in a nickel foam (upper half of figure). The micropores of the hydrogel are exposed to the electrolyte so that ions can enter and form electrochemical double-layers. The nickel framework shortens the distances of charge transfer. Therefore, the electrochemical capacitor exhibits highrate performance (see plots).

    14. Polyelectrolyte-Multilayer-Supported Au@Ag Core-Shell Nanoparticles with High Catalytic Activity (pages 4574–4577)

      Xin Zhang and Zhaohui Su

      Version of Record online: 16 JUL 2012 | DOI: 10.1002/adma.201201712

      Thumbnail image of graphical abstract

      Au-Ag bimetallic core-shell nanoparticles are synthesized in situ in polyelectrolyte multilayers via a sequential ion-exchange/reduction process. The Au-Ag bimetallic nanoparticles show a higher catalytic activity than Au and Ag monometallic ones for the reduction of 4-nitrophenol by NaBH4.

    15. Polyelectrolyte Multilayers Impart Healability to Highly Electrically Conductive Films (pages 4578–4582)

      Yang Li, Shanshan Chen, Mengchun Wu and Junqi Sun

      Version of Record online: 16 JUL 2012 | DOI: 10.1002/adma.201201306

      Thumbnail image of graphical abstract

      Healable, electrically conductive films are fabricated by depositing Ag nanowires on water-enabled healable polyelectrolyte multilayers. The easily achieved healability of the polyelectrolyte multilayers is successfully imparted to the Ag nanowire layer. These films conveniently restore electrical conductivity lost as a result of damage by cuts several tens of micrometers wide when water is dropped on the cuts.

    16. A Minimally Invasive Blood-Extraction System: Elastic Self-Recovery Actuator Integrated with an Ultrahigh- Aspect-Ratio Microneedle (pages 4583–4586)

      Cheng Guo Li, Kwang Lee, Chang Yeol Lee, Manita Dangol and Hyungil Jung

      Version of Record online: 16 JUL 2012 | DOI: 10.1002/adma.201201109

      Thumbnail image of graphical abstract

      A minimally invasive blood-extraction system is fabricated by the integration of an elastic self-recovery actuator and an ultrahigh-aspect-ratio microneedle. The simple elastic self-recovery actuator converts finger force to elastic energy to provide power for blood extraction and transport without requiring an external source of power. This device has potential utility in the biomedical field within the framework of complete micro-electromechanical systems.

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