Advanced Functional Materials

Cover image for Vol. 18 Issue 10

May 23, 2008

Volume 18, Issue 10

Pages 1477–1596

  1. Cover Picture

    1. Top of page
    2. Cover Picture
    3. Contents
    4. Full Papers
    5. Index
    1. Cover Picture: Adv. Funct. Mater. 10/2008 (page 1477)

      Article first published online: 26 MAY 2008 | DOI: 10.1002/adfm.200890037

      Thumbnail image of graphical abstract

      Sherif El-Safty and co-workers report on the synthesis of large-scale optical nanosensor arrays. In this work, sensitivity and fast-response detection of multiple toxic ions are retained despite the implementation short fabrication times and the use of low-cost materials. Highly accessible, flexible, finely tuned surface probes lead to pool-on-surface sensing systems in which high flux of the metal analytes across the indicator molecules is rapidly achieved. These sensing pools show promising sensitivity up to sub-picomolar recognition, long-term stability, reversibility, and selectivity for the detection of most pollutant cations.

  2. Contents

    1. Top of page
    2. Cover Picture
    3. Contents
    4. Full Papers
    5. Index
    1. Contents: Adv. Funct. Mater. 10/2008 (pages 1479–1484)

      Article first published online: 26 MAY 2008 | DOI: 10.1002/adfm.200890038

  3. Full Papers

    1. Top of page
    2. Cover Picture
    3. Contents
    4. Full Papers
    5. Index
    1. Optical Nanoscale Pool-on-Surface Design for Control Sensing Recognition of Multiple Cations (pages 1485–1500)

      Sherif A. El-Safty, Adel A. Ismail, Hideyuki Matsunaga, Takaaki Hanaoka and Fujio Mizukami

      Article first published online: 14 MAY 2008 | DOI: 10.1002/adfm.200701059

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      An effective approach of nanosensors was developed for efficient, simple and high-speed detection of multiple toxic metal ions. This approach enabled development of “pool-on-surface” sensing systems onto 3D nanoscale carriers. These sensing pools show promise in their sensitivity up to sub-picomolar recognition (∼10−11 mol dm−3), long-term stability, reversibility, sensitivity, and selectivity in detecting most pollutant cations.

    2. Temperature-Induced Size-Control of Bioactive Surface Patterns (pages 1501–1508)

      Leonid Ionov, Alla Synytska and Stefan Diez

      Article first published online: 14 MAY 2008 | DOI: 10.1002/adfm.200800017

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      A novel method to produce bioactive surface patterns whose size can be changed in response to a variation of the environmental conditions, rather than local treatment, is presented. The approach is based on the structured surface immobilization of thermoresponsive polymer chains with different transition temperatures. Utilizing kinesin-driven motility of microtubules, the applicability for the temperature-induced size-control of bioactive surface patterns is demonstrated.

    3. Fabrication and Dielectric Characterization of Advanced BaTiO3/Polyimide Nanocomposite Films with High Thermal Stability (pages 1509–1517)

      Zhi-Min Dang, You-Qin Lin, Hai-Ping Xu, Chang-Yong Shi, Sheng-Tao Li and Jinbo Bai

      Article first published online: 5 MAY 2008 | DOI: 10.1002/adfm.200701077

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      An in-situ polymerization process has been successfully employed to prepare barium titanate/polyimide (PI) nanocomposites. A very thin polymer layer (about 5 nm) is coated onto the surface of nanosized BaTiO3 particles to form a core/shell-like structure, which originates from both the electrostatic attraction between the precursor poly(amic acid) and the BaTiO3 particles and the hydrogen bond interaction between PI and the BaTiO3 particles.

    4. One-Step Ionic-Liquid-Assisted Electrochemical Synthesis of Ionic-Liquid-Functionalized Graphene Sheets Directly from Graphite (pages 1518–1525)

      Na Liu, Fang Luo, Haoxi Wu, Yinghui Liu, Chao Zhang and Ji Chen

      Article first published online: 5 MAY 2008 | DOI: 10.1002/adfm.200700797

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      Ionic-liquid-functionalized graphene nanosheets (GNSIL) are produced by a simple, green, one-step electrochemical approach (see figure). A GNSIL/polystyrene composite is shown to have excellent electrical conductivity, 3–15 times that of polystyrene composites with single-walled carbon nanotube filler.

    5. Hierarchical Assembly of Organic/Inorganic Building Molecules with ππ Interactions (pages 1526–1535)

      Lu Yang, Huisheng Peng, Kun Huang, Joel T. Mague, Hexing Li and Yunfeng Lu

      Article first published online: 6 MAY 2008 | DOI: 10.1002/adfm.200700673

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      A novel molecular assembly mechanism is proposed based on combined experimental and computational studies of the organization process of organic/inorganic hybrid molecules. Controlled structures, obtained by manipulating the experimental conditions, are fabricated at multiple length scales with improved electrical and mechanical properties.

    6. Preparation, Characterization, and Application of L-Cysteine Functionalized Multiwalled Carbon Nanotubes as a Selective Sorbent for Separation and Preconcentration of Heavy Metals (pages 1536–1543)

      Yue Liu, Yan Li and Xiu-Ping Yan

      Article first published online: 14 MAY 2008 | DOI: 10.1002/adfm.200701433

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      L-Cysteine functionalized multi-walled carbon nanotubes (MWCNTs-cysteine) are synthesized for selective separation and preconcentration of heavy metal ions. The MWCNTs-cysteine exhibit fairly fast kinetics for the adsorption of Cd2+, and offer up to 1600-fold improvement of the tolerable concentrations of co-existing metal ions over the MWCNTs for on-line solid-phase extraction of Cd2+.

    7. A Simple Template-Free Strategy to Synthesize Nanoporous Manganese and Nickel Oxides with Narrow Pore Size Distribution, and Their Electrochemical Properties (pages 1544–1554)

      Chichao Yu, Lingxia Zhang, Jianlin Shi, Jinjin Zhao, Jianhua Gao and Dongsheng Yan

      Article first published online: 14 MAY 2008 | DOI: 10.1002/adfm.200701052

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      Nanoporous manganese and nickel oxides with polyhedral particle morphologies, high surface areas, and narrow pore distributions can be synthesized by controlled thermal decomposition of oxalate precursors. This method can be extended using other kinds of salt precursors to prepare a series of nanoporous metal oxides. The heating rate, calcination temperature and controlled particle size of the oxalate precursors are important factors in obtaining well-defined pore structures.

    8. The Very-Low Shear Modulus of Multi-Walled Carbon Nanotubes Determined Simultaneously with the Axial Young's Modulus via in situ Experiments (pages 1555–1562)

      Xian-Long Wei, Yang Liu, Qing Chen, Ming-Sheng Wang and Lian-Mao Peng

      Article first published online: 26 MAY 2008 | DOI: 10.1002/adfm.200701105

      Thumbnail image of graphical abstract

      The natural frequencies (f) as a function of the length (L) of single multi-walled carbon nanotubes (MWCNTs) are measured. The experimental f-L data of short carbon nanotubes (CNTs) can be adequately described by the Timoshenko beam model but not by the Euler-Bernouilli beam model due to the significant effect of shear deformation caused by the extremely-anisotropic mechanical properties of the CNTs.

    9. Design of Multilayered Nanostructures and Donor–Acceptor Interfaces in Solution-Processed Thin-Film Organic Solar Cells (pages 1563–1572)

      Hiroaki Benten, Michihiro Ogawa, Hideo Ohkita and Shinzaburo Ito

      Article first published online: 14 MAY 2008 | DOI: 10.1002/adfm.200701167

      Thumbnail image of graphical abstract

      Combining spin-coating with layer-by-layer deposition is a promising approach for fabricating all-solution-processed polymer-based solar cells whose multilayered structures are well controlled with nanometer precision (see figure). The layer-by-layer technique enables us not only to design the interfacial structure at the donor-acceptor heterojunction but also to adjust the thickness of the light-harvesting layer to the exciton diffusion length.

    10. Shape Anisotropy and Magnetization Modulation in Hexagonal Cobalt Nanowires (pages 1573–1578)

      Zuwei Liu, Pai-Chun Chang, Chia-Chi Chang, Evgeniy Galaktionov, Gerd Bergmann and Jia G. Lu

      Article first published online: 14 MAY 2008 | DOI: 10.1002/adfm.200701010

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      Ferromagnetic Co nanowires with hcp single-crystalline structure and easy axis perpendicular to the wire axis are studied. Strong shape anisotropy is evident from weak temperature dependence of the enhanced coercive field along the wire axis. Distinct dipoles of opposite polarity at the wire ends and a spatial magnetization modulation along the wire (see figure) with a period ∼700 nm arise from competition between the magnetocrystalline polarization along the easy axis and the shape demagnetization energy along the wire axis.

    11. Functionalized Asymmetric Linear Acenes for High-Performance Organic Semiconductors (pages 1579–1585)

      Ming L. Tang, Anna D. Reichardt, Toshihiro Okamoto, Nobuyuki Miyaki and Zhenan Bao

      Article first published online: 26 MAY 2008 | DOI: 10.1002/adfm.200701529

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      Organic semiconductors that have a thiophene unit fused to a linear acene unit (see figure) have been functionalized and characterized as organic field-effect transistors. These molecules have mobility higher than or equal to the parent anthra[2,3-b]thiophene and the tetraceno[2,3-b]thiophene molecules, from 0.2–0.85 cm2 V−1 s−1, and are more stable and soluble than pentacene.

    12. Polymer Microcapsules with Carbohydrate-Sensitive Properties (pages 1586–1594)

      Tatjana Levy, Christophe Déjugnat and Gleb B. Sukhorukov

      Article first published online: 15 APR 2008 | DOI: 10.1002/adfm.200701291

      Thumbnail image of graphical abstract

      Sugar-responsive multilayers are assembled by covalently linking a polysaccharide mannan and poly(acrylic acid) with grafted boronic acid moieties. This combination of polymers is also used to assemble microcapsules incorporating fluorophores, as depicted in the figure. Upon exposure to a sugar solution, the multilayers/microcapsules are dissolved by a competitive reaction of the sugars with the boronic acid moieties.

  4. Index

    1. Top of page
    2. Cover Picture
    3. Contents
    4. Full Papers
    5. Index

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