Advanced Materials

Cover image for Vol. 22 Issue 38

October 8, 2010

Volume 22, Issue 38

Pages 4215–4329

  1. Cover Picture

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Progress Report
    6. Review
    7. Communications
    1. Chitosan/Gold Nanocomposites: Chitosan Films Doped with Gold Nanorods as Laser-Activatable Hybrid Bioadhesives (Adv. Mater. 38/2010)

      Paolo Matteini, Fulvio Ratto, Francesca Rossi, Sonia Centi, Luigi Dei and Roberto Pini

      Version of Record online: 27 SEP 2010 | DOI: 10.1002/adma.201090124

      Thumbnail image of graphical abstract

      The cover image represents an inside view of a laser-activated gold nanorod/chitosan film. Gold nanorods dispersed throughout the polymeric chitosan matrix absorb incident near-infrared laser light. The photothermal conversion from the gold nanorods activates the surrounding chitosan strands to mediate functional adhesion with biological tissue, as discussed in work reported on p. 4313 by Paolo Matteini and co-workers.

  2. Inside Front Cover

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Progress Report
    6. Review
    7. Communications
    1. Flexible Electronics: Fully Flexible Solution-Deposited ZnO Thin-Film Transistors (Adv. Mater. 38/2010)

      Keunkyu Song, Junghun Noh, Taehwan Jun, Yangho Jung, Hae-Yoon Kang and Jooho Moon

      Version of Record online: 27 SEP 2010 | DOI: 10.1002/adma.201090125

      Thumbnail image of graphical abstract

      Solution-processed ‘real’ flexible ZnO thin-film transistors (TFTs) on plastic substrates are demonstrated on p. 4308 by Jooho Moon and co-workers. The flexible device shows exceptional and unprecedented stability against various stresses such as bending, rolling, wearing, and folding, exhibiting no degradation at tensile strains up to 6.35%. Such solution processable semiconductor devices can be used to realize transparent, flexible electronic devices.

  3. Contents

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Progress Report
    6. Review
    7. Communications
  4. Progress Report

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Progress Report
    6. Review
    7. Communications
    1. New Concepts and Applications in the Macromolecular Chemistry of Fullerenes (pages 4220–4248)

      Francesco Giacalone and Nazario Martín

      Version of Record online: 26 AUG 2010 | DOI: 10.1002/adma.201000083

      Thumbnail image of graphical abstract

      Polymers are everywhere in our world! A new and fantastic scenario in terms of future possibilities is envisaged by combining polymers with the spherical fullerene molecules. This unprecedented hybrid fullerene world, using fullerenes covalently or supramolecularly mixed with other materials such as silica, DNA, carbon nanotubes, or semiconducting polymers, paves the way to new possibilities in materials science.

  5. Review

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Progress Report
    6. Review
    7. Communications
    1. Colloidal Self-Assembly Meets Nanofabrication: From Two-Dimensional Colloidal Crystals to Nanostructure Arrays (pages 4249–4269)

      Junhu Zhang, Yunfeng Li, Xuemin Zhang and Bai Yang

      Version of Record online: 27 AUG 2010 | DOI: 10.1002/adma.201000755

      Thumbnail image of graphical abstract

      This review article presents an overview of two-dimensional (2D) colloidal crystals and nanostructure arrays fabricated by colloidal lithography. First, methods for fabricating self-assembled 2D colloidal crystals and complex 2D colloidal crystal structures are presented. Then, according to the nanofabrication strategy employed in colloidal lithography, related works are reviewed as colloidal-crystal-assisted evaporation, deposition, etching, imprinting, and dewetting, respectively.

  6. Communications

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Progress Report
    6. Review
    7. Communications
    1. Dye-Sensitized Back-Contact Solar Cells (pages 4270–4274)

      Dongchuan Fu, Xiao Li Zhang, Richard L Barber and Udo Bach

      Version of Record online: 9 JUN 2010 | DOI: 10.1002/adma.201001006

      Thumbnail image of graphical abstract

      Dye-sensitized back-contact solar cells are fabricated on back plates comprising a patterned FTO glass substrate, a selectively deposited Pt coating, a protective ZrO2 coating covering the Pt layers and a screen printed TiO2 film. Such devices show a solar energy conversion efficiency of 3.64% under AM 1.5 sunlight and a peak incident photon to electron conversion efficiency of 54%.

    2. Assembly of Pure Silver-Tungsten-Oxide Frameworks from Nanostructured Solution Processable Clusters and Their Evolution into Materials with a Metallic Component (pages 4275–4279)

      Thomas McGlone, Carsten Streb, De-Liang Long and Leroy Cronin

      Version of Record online: 8 JUN 2010 | DOI: 10.1002/adma.201001398

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      Silver-Tungsten-Oxide Frameworks: Isomerically pure forms of the unique isopolyoxotungstate system are incorporated into highly connected framework materials using Ag(I) as a linking unit. Thermal treatment of the materials leads to the formation of silver microparticles embedded in a tungsten oxide matrix. This novel synthetic approach promises to create a new class of nanostructured tungsten-silver-oxides with exciting physical properties, as well as exemplifies the potential for new frameworks based upon solution processable POM clusters.

    3. Glutathione-Induced Intracellular Release of Guests from Mesoporous Silica Nanocontainers with Cyclodextrin Gatekeepers (pages 4280–4283)

      Hyehyeon Kim, Saehee Kim, Chiyoung Park, Hyemi Lee, Heon Joo Park and Chulhee Kim

      Version of Record online: 27 AUG 2010 | DOI: 10.1002/adma.201001417

      Thumbnail image of graphical abstract

      Cyclodextrins tethered onto a mesoporous silica nanoparticle via disulfide stalking are effective gatekeepers not only to entrap guest molecules in the pore but also to release the guest in response to glutathione (GSH). The PEGylated nanocontainers also exhibit efficient GSH-mediated release of doxorubicin in cancer cells. Our approach offers unique applications for multifunctional delivery systems.

    4. Single ZnO Nanowire/p-type GaN Heterojunctions for Photovoltaic Devices and UV Light-Emitting Diodes (pages 4284–4287)

      Ya-Qing Bie, Zhi-Min Liao, Peng-Wei Wang, Yang-Bo Zhou, Xiao-Bing Han, Yu Ye, Qing Zhao, Xiao-Song Wu, Lun Dai, Jun Xu, Li-Wen Sang, Jun-Jing Deng, K. Laurent, Y. Leprince-Wang and Da-Peng Yu

      Version of Record online: 22 JUL 2010 | DOI: 10.1002/adma.201000985

      Thumbnail image of graphical abstract

      We fabricate heterojunctions consisting of a single n-type ZnO nanowire and a p-type GaN film. The photovoltaic effect of heterojunctions exhibits open-circuit voltages ranging from 2 to 2.7 V, and a maximum output power reaching 80 nW. Light-emitting diodes with UV electroluminescence based on the heterojunctions are demonstrated.

    5. Temperature as a Single On-Off Parameter Controlling Nanoparticles Growing, Stabilization and Fast Disentanglement (pages 4288–4292)

      Paula M. López-Pérez, Ricardo M. P. da Silva, Iva Pashkuleva, Julio San Román and Rui L Reis

      Version of Record online: 22 JUL 2010 | DOI: 10.1002/adma.201001717

      Thumbnail image of graphical abstract

      Thermoresponsive nanoparticles are synthesized from ionic random terpolymer precursors. A distinct temperature-dependent aggregation-redissolution behavior is observed within a subtle balance between polymer ionic charge and hydrophobic content, which is used for colloidal synthesis of nanoparticles in aqueous medium and without surfactants. The solution thermal history provides a robust mean to customize the size of nanoparticles that can be disentangled on command.

    6. Encapsulation of Water-Insoluble Drugs in Polymer Capsules Prepared Using Mesoporous Silica Templates for Intracellular Drug Delivery (pages 4293–4297)

      Yajun Wang, Yan Yan, Jiwei Cui, Leticia Hosta-Rigau, Joan K. Heath, Edouard C. Nice and Frank Caruso

      Version of Record online: 18 JUN 2010 | DOI: 10.1002/adma.201001497

      Thumbnail image of graphical abstract

      Water-insoluble compounds were encapsulated in polymer capsules through mesoporous silica nanoparticle-mediated layer-by-layer assembly. The drug-loaded capsules exhibit excellent colloidal stability and high potency to colorectal cancer cells in vitro with similar cytotoxicity to the free drug dissolved in organic solvent.

    7. A Nanoparticle Convective Directed Assembly Process for the Fabrication of Periodic Surface Enhanced Raman Spectroscopy Substrates (pages 4298–4302)

      V. Liberman, C. Yilmaz, T. M. Bloomstein, S. Somu, Y. Echegoyen, A. Busnaina, S. G. Cann, K. E. Krohn, M. F. Marchant and M. Rothschild

      Version of Record online: 12 JUL 2010 | DOI: 10.1002/adma.201001670

      Thumbnail image of graphical abstract

      A highly scalable approach for producing surface-enhanced Raman spectroscopy substrates is introduced. The novel method involves assembling individual nanoparticles in pre-defined templates, one particle per template, forming a high denisity of nanogaps over large areas, while decoupling nanostructure synthesis from placement.

    8. Complete Characterization of Thermoelectric Materials by a Combined van der Pauw Approach (pages 4303–4307)

      Johannes de Boor and Volker Schmidt

      Version of Record online: 12 JUL 2010 | DOI: 10.1002/adma.201001654

      Thumbnail image of graphical abstract

      Thermoelectric materials can convert waste heat directly into electrical power and represent an important contribution to lessen energy scarcity. Here we present a novel, simple and inexpensive approach for a complete thermoelectric characterization, by which all relevant quantities, like the electrical conductivity, the thermal conductivity, the Seebeck coefficient, and the figure of merit, can be determined directly.

    9. Fully Flexible Solution-Deposited ZnO Thin-Film Transistors (pages 4308–4312)

      Keunkyu Song, Junghun Noh, Taehwan Jun, Yangho Jung, Hae-Yoon Kang and Jooho Moon

      Version of Record online: 23 AUG 2010 | DOI: 10.1002/adma.201002163

      Thumbnail image of graphical abstract

      Solution-processed, fully flexible ZnO thin-film transistors (TFTs) on semitransparent substrates are demonstrated. Our devices show exceptional and unprecedented stablity against various bending stresses, i.e., bending, rolling, wearing, and folding, exhibiting no degradation at tensile strains up to 6.35%.

    10. Chitosan Films Doped with Gold Nanorods as Laser-Activatable Hybrid Bioadhesives (pages 4313–4316)

      Paolo Matteini, Fulvio Ratto, Francesca Rossi, Sonia Centi, Luigi Dei and Roberto Pini

      Version of Record online: 23 AUG 2010 | DOI: 10.1002/adma.201002228

      Thumbnail image of graphical abstract

      Biocompatible chitosan/gold nanorods films are fabricated and tested as laser-activatable adhesives. When exposed to near-infrared laser light the nanoparticles carry out efficient photothermal conversion, which activates the polar groups of chitosan strands and mediates functional adhesion with a biological tissue. This technology may enable a number of key applications in medicine including tissue repair, wound dressing and drug delivery.

    11. Carbon Nanotube/Hexa-peri-hexabenzocoronene Bilayers for Discrimination Between Nonpolar Volatile Organic Compounds of Cancer and Humid Atmospheres (pages 4317–4320)

      Yael Zilberman, Ulrike Tisch, Gregory Shuster, Wojciech Pisula, Xinliang Feng, Klaus Müllen and Hossam Haick

      Version of Record online: 1 JUN 2010 | DOI: 10.1002/adma.201001275

      Thumbnail image of graphical abstract

      Cancer detection: The development of a cost-effective, portable and non-invasive diagnostic tool for detecting cancer from exhaled breath requires sensors that discriminate well between polar and nonpolar volatile organic compounds in highly humid atmospheres. Here we show that a chemiresistive bilayer comprised of a dense cap layer of discotic hexa-dodecyl-hexa-peri-hexabenzocoronene derivatives (hereby, HBC-C12) and a random network of carbon nanotubes (RN-CNT) as underlayer layer could fulfill these requirements.

    12. Improved Film Morphology Reduces Charge Carrier Recombination into the Triplet Excited State in a Small Bandgap Polymer-Fullerene Photovoltaic Cell (pages 4321–4324)

      Daniele Di Nuzzo, Aranzazu Aguirre, Munazza Shahid, Veronique S. Gevaerts, Stefan C. J. Meskers and René A. J. Janssen

      Version of Record online: 25 JUN 2010 | DOI: 10.1002/adma.201001452

      Thumbnail image of graphical abstract

      The use of diiodooctane as processing additive for construction of PCPDTBT:PCBM solar cells results in a profound change in photophysical behavior of this blend. In the improved morphology obtained with the additive, recombination of charge carriers to the lowest triplet excited state is suppressed. This contributes to the boost in solar power conversion efficiency induced by the use of the processing agent.

    13. Graphoepitaxial Assembly of Symmetric Block Copolymers on Weakly Preferential Substrates (pages 4325–4329)

      Eungnak Han, Huiman Kang, Chi-Chun Liu, Paul F. Nealey and Padma Gopalan

      Version of Record online: 30 AUG 2010 | DOI: 10.1002/adma.201001669

      Thumbnail image of graphical abstract

      Weakly preferential substrates were utilized in a single step process to direct the assembly of symmetric PS-b-PMMA. The thickness dependence of domain orientation on weakly preferential substrates was exploited to dictate the lateral ordering of perpendicular lamellae.

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