Advanced Materials

Cover image for Vol. 21 Issue 21

June 5, 2009

Volume 21, Issue 21

Pages 2125–2242

  1. Cover Picture

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Progress Report
    6. Communications
    7. Research News
    8. Index
    1. Nanoscale Logic Circuits: Hybrid Complementary Logic Circuits of One-Dimensional Nanomaterials with Adjustment of Operation Voltage (Adv. Mater. 21/2009)

      Gunho Jo, Woong-Ki Hong, Jung Inn Sohn, Minseok Jo, Jiyong Shin, Mark E. Welland, Hyunsang Hwang, Kurt E. Geckeler and Takhee Lee

      Version of Record online: 2 JUN 2009 | DOI: 10.1002/adma.200990077

      Thumbnail image of graphical abstract

      A new layout of complementary logic circuits based on p-channel carbon nanotube and n-channel zinc oxide nanowire transistors is presented by Takhee Lee and co-workers on p. 2156. The processing is a hybrid approach, combining advantageous characteristic functions for the modulation of the current and operating voltage in transistors through proton radiation-generated charges, allowing a simple method of designing favorable logic circuits.

  2. Inside Front Cover

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Progress Report
    6. Communications
    7. Research News
    8. Index
    1. Quantum Dot–Polymer Composites for Displays: Inkjet-Printed Quantum Dot–Polymer Composites for Full-Color AC-Driven Displays (Adv. Mater. 21/2009)

      Vanessa Wood, Matthew J. Panzer, Jianglong Chen, Michael S. Bradley, Jonathan E. Halpert, Moungi G. Bawendi and Vladimir Bulović

      Version of Record online: 2 JUN 2009 | DOI: 10.1002/adma.200990078

      Thumbnail image of graphical abstract

      Vladimir Bulovic and co-workers show on p. 2151 that colloidal quantum dot-polymer composites are used for inkjet print-deposition of high resolution, patterned, multicolored thin films in the fabrication of robust, bright, full-color AC-driven displays. The inside cover shows an inkjet nozzle with a quantum dot solution and a completed device on a flexible substrate under UV illumination, with inset examples of the achievable high resolution and patterning.

  3. Contents

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Progress Report
    6. Communications
    7. Research News
    8. Index
  4. Progress Report

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Progress Report
    6. Communications
    7. Research News
    8. Index
    1. Inorganic Nanoparticles for MRI Contrast Agents (pages 2133–2148)

      Hyon Bin Na, In Chan Song and Taeghwan Hyeon

      Version of Record online: 4 MAR 2009 | DOI: 10.1002/adma.200802366

      Thumbnail image of graphical abstract

      Various inorganic nanoparticles are used as magnetic resonance imaging (MRI) contrast agents due to their unique properties, such as their large surface areas and efficient contrasting effect. New inorganic nanoparticles have been developed for the molecular imaging and more specific diagnosis through recent progress. In this report, we summarize recent progress on the inorganic-nanoparticle-based MRI contrast agents.

  5. Communications

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Progress Report
    6. Communications
    7. Research News
    8. Index
    1. Inkjet-Printed Quantum Dot–Polymer Composites for Full-Color AC-Driven Displays (pages 2151–2155)

      Vanessa Wood, Matthew J. Panzer, Jianglong Chen, Michael S. Bradley, Jonathan E. Halpert, Moungi G. Bawendi and Vladimir Bulović

      Version of Record online: 4 MAR 2009 | DOI: 10.1002/adma.200803256

      Thumbnail image of graphical abstract

      Colloidal quantum dot–polymer composites are used for inkjet-print deposition of high-resolution, patterned, multicolored thin films in the fabrication of robust, bright, full-color AC-driven displays. The left panel shows a photograph of a complete device on a flexible substrate under UV illumination, while the right panel shows photographs of the electroluminescence of red, green, and blue 80 mm2 pixels.

    2. Hybrid Complementary Logic Circuits of One-Dimensional Nanomaterials with Adjustment of Operation Voltage (pages 2156–2160)

      Gunho Jo, Woong-Ki Hong, Jung Inn Sohn, Minseok Jo, Jiyong Shin, Mark E. Welland, Hyunsang Hwang, Kurt E. Geckeler and Takhee Lee

      Version of Record online: 14 APR 2009 | DOI: 10.1002/adma.200803510

      Thumbnail image of graphical abstract

      A new layout of complementary logic circuits based on p-channel carbon nanotube and n-channel zinc oxide nanowire transistors is presented, providing a hybrid approach to combine advantageous characteristic functions for the modulation of the current and operating voltage in transistors through proton radiation-generated charges, which allow a simple way to design favorable logic circuits.

    3. Aligned Cell Sheets Grown on Thermo-Responsive Substrates with Microcontact Printed Protein Patterns (pages 2161–2164)

      Corin Williams, Yukiko Tsuda, Brett C. Isenberg, Masayuki Yamato, Tatsuya Shimizu, Teruo Okano and Joyce Y. Wong

      Version of Record online: 9 OCT 2008 | DOI: 10.1002/adma.200801027

      Thumbnail image of graphical abstract

      The thermo-responsive polymer poly(N-isopropylacrylamide) is microcontact printed with fibronectin lanes. Cells seeded onto these substrates form globally aligned tissue sheets that can be harvested by lowering the temperature.

    4. Nanotubular Mesoporous Bimetallic Nanostructures with Enhanced Electrocatalytic Performance (pages 2165–2169)

      Caixia Xu, Liqin Wang, Rongyue Wang, Kai Wang, Yan Zhang, Fang Tian and Yi Ding

      Version of Record online: 2 MAR 2009 | DOI: 10.1002/adma.200702700

      Thumbnail image of graphical abstract

      Catalytic functionalization of nanoporous copper generates a novel type of hierarchically hollow bimetallic nanocomposites, which show superior catalytic performance with greatly enhanced antipoisoning effect for methanol electro-oxidation. With the advantages of high catalytic performance, eco-friendly chemical processing, and low fabrication cost, these nanostructures hold great potential for important energy-saving technologies.

    5. Fluorescent Polystyrene–Fe3O4 Composite Nanospheres for In Vivo Imaging and Hyperthermia (pages 2170–2173)

      Donglu Shi, Hoon Sung Cho, Yan Chen, Hong Xu, Hongchen Gu, Jie Lian, Wei Wang, Guokui Liu, Christopher Huth, Lumin Wang, Rodney C. Ewing, Sergei Budko, Giovanni M. Pauletti and Zhongyun Dong

      Version of Record online: 13 MAR 2009 | DOI: 10.1002/adma.200803159

      Thumbnail image of graphical abstract

      Quantum dots (QDs) are immobilized on the surfaces of magnetic Fe3O4-composite nanospheres (MNSs, see figure). The QDs exhibit intense visible-light emission in fluorescence spectroscopy and successfully facilitate, for the first time, in vivo soft-tissue imaging in live mice. The Fe3O4 nanoparticles respond to an external magnetic field by increasing the temperature of the surrounding environment (i.e., hyperthermia), which can be used therapeutically.

    6. Comparison of the Mobility–Carrier Density Relation in Polymer and Single-Crystal Organic Transistors Employing Vacuum and Liquid Gate Dielectrics (pages 2174–2179)

      Yu Xia, Jeong Ho Cho, Jiyoul Lee, P. Paul Ruden and C. Daniel Frisbie

      Version of Record online: 9 MAR 2009 | DOI: 10.1002/adma.200803437

      Thumbnail image of graphical abstract

      The mobility of polymer and single-crystal transistors using a universal test-bed where the injected carrier density can vary more than four orders of magnitude are investigated and compared. A striking difference in the mobility–carrier density relationship was observed, revealing a fundamentally different charge-transport mechanism between polymer and single-crystal transistors.

    7. Fabrication of Graphene–Polymer Nanocomposites With Higher-Order Three-Dimensional Architectures (pages 2180–2184)

      Jemma L. Vickery, Avinash J. Patil and Stephen Mann

      Version of Record online: 13 MAR 2009 | DOI: 10.1002/adma.200803606

      Thumbnail image of graphical abstract

      The use of aqueous dispersions of polystyrene sulfonate-stabilized graphene sheets for the fabrication of nanocomposites with higher-order 3D architectures is demonstrated using two examples of template-directed assembly. Macroscopic sponge-like polymer–graphene scaffolds are readily produced by directional freeze casting, while hollow graphene microspheres are prepared by electrostatically induced assembly on positively charged polymer beads.

    8. Mechanically Powered Transparent Flexible Charge-Generating Nanodevices with Piezoelectric ZnO Nanorods (pages 2185–2189)

      Min-Yeol Choi, Dukhyun Choi, Mi-Jin Jin, Insoo Kim, Sang-Hyeob Kim, Jae-Young Choi, Sang Yoon Lee, Jong Min Kim and Sang-Woo Kim

      Version of Record online: 19 MAR 2009 | DOI: 10.1002/adma.200803605

      Thumbnail image of graphical abstract

      Transparent flexible charge-generating piezoelectric nanodevices are developed. The resulting integrated nanodevice generates a noticeable current when it is pushed by application of an external load. Piezoelectric ZnO nanorod-based nanodevices with embossed PdAu top electrodes produce the highest output current density of approximately 10 μA cm−2 at a load of 0.9 kgf.

    9. Fabrics with Tunable Oleophobicity (pages 2190–2195)

      Wonjae Choi, Anish Tuteja, Shreerang Chhatre, Joseph M. Mabry, Robert E. Cohen and Gareth H. McKinley

      Version of Record online: 16 MAR 2009 | DOI: 10.1002/adma.200802502

      Thumbnail image of graphical abstract

      A simple “dip-coating” process that imbues oleophobicity to various surfaces that inherently possess re-entrant texture, such as commercially available fabrics, is reported. These dip-coated fabric surfaces exhibit reversible, deformation-dependent, tunable wettability, including the capacity to switch their surface wetting properties (between super-repellent and super-wetting) against a wide range of polar and nonpolar liquids.

    10. Colossal Electroresistance and Giant Magnetoresistance in Doped PbPdO2 Thin Films (pages 2196–2199)

      Xiaolin Wang, Germanas Peleckis, Chao Zhang, Hideo Kimura and Shixue Dou

      Version of Record online: 4 MAR 2009 | DOI: 10.1002/adma.200802868

      Thumbnail image of graphical abstract

      Observations on colossal electroresistance (ER) and giant magnetoresistance in doped PbPdO2, one of the candidates of a new class of materials, spin gap-less semiconductors, are reported. The resistivity is strongly suppressed by electrical current below a metal-insulator transition with the ER values of up to 107, which is much greater than that achieved in colossal magnetoresistance materials.

    11. A Facile Synthesis Approach to C8-Functionalized Magnetic Carbonaceous Polysaccharide Microspheres for the Highly Efficient and Rapid Enrichment of Peptides and Direct MALDI-TOF-MS Analysis (pages 2200–2205)

      Hemei Chen, Chunhui Deng, Yan Li, Ying Dai, Pengyuan Yang and Xiangmin Zhang

      Version of Record online: 2 JUN 2009 | DOI: 10.1002/adma.200802260

      Thumbnail image of graphical abstract

      Biocompatible C8-functionalized magnetic carbonaceous polysaccharide microspheres are synthesized via a facile, low-cost, and large-scale route, and their use for the enrichment of peptides from protein digest mixtures is presented. The process of enrichment is very simple, quick, and efficient. Peptides loaded onto the C8-functionalized magnetic carbonaceous polysaccharide microspheres can be directly analyzed by MALDI-TOF-MS without prior elution from the microspheres.

    12. Mesoporous Anatase TiO2 Beads with High Surface Areas and Controllable Pore Sizes: A Superior Candidate for High-Performance Dye-Sensitized Solar Cells (pages 2206–2210)

      Dehong Chen, Fuzhi Huang, Yi-Bing Cheng and Rachel A. Caruso

      Version of Record online: 9 MAR 2009 | DOI: 10.1002/adma.200802603

      Thumbnail image of graphical abstract

      Mesoporous anatase TiO2 beads with high surface areas and controllable pore sizes are prepared by using a combined sol–gel and solvothermal process. Dye-sensitized solar cells made from these mesoporous beads gave a total power conversion efficiency of 7.20% under AM 1.5 sunlight, higher than that obtained using Degussa P25 films of similar thickness (5.66%).

    13. Thermochemical Patterning of Polymer Thin Films With Tunable Size-Reduction Effects Using Metal-Coated Poly(dimethylsiloxane) Stamps (pages 2211–2215)

      Fangfang Wang, Mianqi Xue and Tingbing Cao

      Version of Record online: 19 MAR 2009 | DOI: 10.1002/adma.200802707

      Thumbnail image of graphical abstract

      Metal-coated poly(dimethylsiloxane) (PDMS) stamps are treated as parallel microelectrodes to selectively induce thermochemical crosslinking of polymer thin films on Si substrates. Periodical polymer micro- and nanostructures with various size-reduction effects can be achieved by changing the conditions during metal deposition or modifying the surface of the metal-coated PDMS stamp.

    14. Multicolor Fluorescent and Permeation-Selective Microbeads Enable Simultaneous Sensing of pH, Oxygen, and Temperature (pages 2216–2220)

      Matthias I. J. Stich, Michael Schaeferling and Otto S. Wolfbeis

      Version of Record online: 9 MAR 2009 | DOI: 10.1002/adma.200803575

      Thumbnail image of graphical abstract

      Multicolor fluorescent microbeads made from various polymers and incorporated into a binder polymer to produce a material whose three signals (measuring pH, temperature, and presence of O2) can be unambiguously assigned after either spectral or time-resolved separation. This renders the material well suited for continuous sensing of these parameters in blood or other bioliquids.

    15. En Route to High External Quantum Efficiency (∼12%), Organic True-Blue-Light-Emitting Diodes Employing Novel Design of Iridium (III) Phosphors (pages 2221–2225)

      Yuan-Chieh Chiu, Jui-Yi Hung, Yun Chi, Chung-Chia Chen, Chih-Hao Chang, Chung-Chih Wu, Yi-Ming Cheng, Ya-Chien Yu, Gene-Hsiang Lee and Pi-Tai Chou

      Version of Record online: 18 DEC 2008 | DOI: 10.1002/adma.200802546

      Thumbnail image of graphical abstract

      True-blue Ir(III) phosphors are designed, synthesized, and applied to multilayered organic true-blue-light-emitting diodes with CIEx,y color chromaticity of (0.15,0.11) and maximum external quantum efficiency of ∼12%, demonstrating unprecedented performance among all blue-phosphorescent OLEDs ever documented. The molecular-design strategy and subsequent device-fabrication protocol reveal a major development in OLEDs.

    16. High-Performance Zinc Oxide Transistors and Circuits Fabricated by Spray Pyrolysis in Ambient Atmosphere (pages 2226–2231)

      Aneeqa Bashir, Paul H. Wöbkenberg, Jeremy Smith, James M. Ball, George Adamopoulos, Donal D. C. Bradley and Thomas D. Anthopoulos

      Version of Record online: 9 APR 2009 | DOI: 10.1002/adma.200803584

      Thumbnail image of graphical abstract

      The use of a simple deposition technique, namely spray pyrolysis, for the fabrication of high-mobility, low-voltage ZnO transistors and simple integrated circuits is demonstrated. The method is compatible with large-area deposition and could potentially address both the issue of manufacturing cost and high operating voltages.

  6. Research News

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Progress Report
    6. Communications
    7. Research News
    8. Index
    1. Photocatalytic Carbon-Nanotube–TiO2 Composites (pages 2233–2239)

      Karran Woan, Georgios Pyrgiotakis and Wolfgang Sigmund

      Version of Record online: 13 MAR 2009 | DOI: 10.1002/adma.200802738

      Thumbnail image of graphical abstract

      Carbon-nanotube–titania composites exhibit enhanced photocatalytic properties over titania. The proposed mechanisms of catalytic enhancement resulting from the pairing of the titania semiconductor with either metallic, semiconducting, or defect-rich carbon nanotubes is discussed. The recent advances in the synthesis techniques for these composites and their photocatalytic reactions with organic, inorganic, and biological agents are also highlighted.

  7. Index

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Progress Report
    6. Communications
    7. Research News
    8. Index

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