Advanced Materials

Cover image for Vol. 21 Issue 16

April 27, 2009

Volume 21, Issue 16

Pages 1535–1648

  1. Cover Picture

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Vital Statistics
    6. Comments
    7. Review Article
    8. Frontispiece
    9. Communications
    10. Research News
    11. Index
    1. Cobalt Nanoskeletons: One-Pot Solution Synthesis of Cubic Cobalt Nanoskeletons (Adv. Mater. 16/2009)

      Xi Wang, Hongbing Fu, Aidong Peng, Tianyou Zhai, Ying Ma, Fangli Yuan and Jiannian Yao

      Article first published online: 21 APR 2009 | DOI: 10.1002/adma.200990051

      Thumbnail image of graphical abstract

      Cubic Co nanoskeletons with an edge length of 100 nm can be prepared by a facile one-step solution method. In work reported on p. 1636 by Ying Ma, Fangli Yuan, Jiannian Yao, and co-workers, CoO nanoparticles of ∼10 nm are subjected to self-aggregating, in situ reduction, Ostwald ripening, and facet-selective coordination-assisted etching to form these novel structures, which exhibit excellent magnetic properties. Simple control of the shape can be achieved by altering the reaction time.

  2. Inside Front Cover

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Vital Statistics
    6. Comments
    7. Review Article
    8. Frontispiece
    9. Communications
    10. Research News
    11. Index
    1. Polymer Charge Transport: Charge-Transport Anisotropy Due to Grain Boundaries in Directionally Crystallized Thin Films of Regioregular Poly(3-hexylthiophene) (Adv. Mater. 16/2009)

      Leslie H. Jimison, Michael F. Toney, Iain McCulloch, Martin Heeney and Alberto Salleo

      Article first published online: 21 APR 2009 | DOI: 10.1002/adma.200990052

      Thumbnail image of graphical abstract

      Grain boundaries can be engineered in directionally oriented thin films of poly(3-hexylthiophene) report Alberto Salleo and co-workers on p. 1568. Charge-transport studies coupled with X-ray and AFM characterization indicate that intergrain transport is greatly facilitated when neighboring grains can be bridged by relatively straight polymer chains.

  3. Contents

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Vital Statistics
    6. Comments
    7. Review Article
    8. Frontispiece
    9. Communications
    10. Research News
    11. Index
    1. Contents: (Adv. Mater. 16/2009) (pages 1535–1542)

      Article first published online: 21 APR 2009 | DOI: 10.1002/adma.200990053

  4. Vital Statistics

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Vital Statistics
    6. Comments
    7. Review Article
    8. Frontispiece
    9. Communications
    10. Research News
    11. Index
    1. Vital Statistics (Adv. Mater. 16/2009) (page 1545)

      Article first published online: 21 APR 2009 | DOI: 10.1002/adma.200990054

  5. Comments

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Vital Statistics
    6. Comments
    7. Review Article
    8. Frontispiece
    9. Communications
    10. Research News
    11. Index
    1. Comment on “Molecular Transport Junctions: Clearing Mists” (page 1547)

      Massimiliano Di Ventra

      Article first published online: 25 MAR 2009 | DOI: 10.1002/adma.200800868

    2. Response to comment by Di Ventra on “Molecular Junctions: Clearing Mists” (page 1548)

      Stuart. M. Lindsay and Mark A. Ratner

      Article first published online: 25 MAR 2009 | DOI: 10.1002/adma.200803718

  6. Review Article

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Vital Statistics
    6. Comments
    7. Review Article
    8. Frontispiece
    9. Communications
    10. Research News
    11. Index
    1. Toxicity Evaluation for Safe Use of Nanomaterials: Recent Achievements and Technical Challenges (pages 1549–1559)

      Saber M. Hussain, Laura K. Braydich-Stolle, Amanda M. Schrand, Richard C. Murdock, Kyung O. Yu, David M. Mattie, John J. Schlager and Mauricio Terrones

      Article first published online: 11 FEB 2009 | DOI: 10.1002/adma.200801395

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      This Review evaluates nanotoxicity studies on nanomaterials and their characteristics that are suspected to contribute to their toxic potential as well as pitfalls and limitations that should be addressed by both materials scientists and life scientists.

  7. Frontispiece

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Vital Statistics
    6. Comments
    7. Review Article
    8. Frontispiece
    9. Communications
    10. Research News
    11. Index
    1. Bioinspired Materials: Oligothiophene Versus β-Sheet Peptide: Synthesis and Self-Assembly of an Organic Semiconductor-Peptide Hybrid (Adv. Mater. 16/2009)

      Eva-Kathrin Schillinger, Elena Mena-Osteritz, Jens Hentschel, Hans G. Börner and Peter Bäuerle

      Article first published online: 21 APR 2009 | DOI: 10.1002/adma.200990055

      Thumbnail image of graphical abstract

      A first representative of a novel class of bioinspired materials, a fully symmetric hybrid between an oligothiophene and a β-sheet peptide, is introduced in work by Peter Bäuerle and co-workers on p. 1562. The conjugate can be synthesized via click-chemistry and employs a switch-peptide segment to gain control over the self-assembly motif of the peptide part.

  8. Communications

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Vital Statistics
    6. Comments
    7. Review Article
    8. Frontispiece
    9. Communications
    10. Research News
    11. Index
    1. Oligothiophene Versus β-Sheet Peptide: Synthesis and Self-Assembly of an Organic Semiconductor-Peptide Hybrid (pages 1562–1567)

      Eva-Kathrin Schillinger, Elena Mena-Osteritz, Jens Hentschel, Hans G. Börner and Peter Bäuerle

      Article first published online: 2 FEB 2009 | DOI: 10.1002/adma.200803110

      Thumbnail image of graphical abstract

      A first representative of a novel class of bioinspired materials is introduced, a fully symmetric hybrid between an oligothiophene and a β-sheet peptide. The conjugate is synthesized via “click chemistry”, and employs a switch-peptide segment to gain control over the self-assembly motif of the peptide part. The self-organization properties of the hybrid are investigated.

    2. Charge-Transport Anisotropy Due to Grain Boundaries in Directionally Crystallized Thin Films of Regioregular Poly(3-hexylthiophene) (pages 1568–1572)

      Leslie H. Jimison, Michael F. Toney, Iain McCulloch, Martin Heeney and Alberto Salleo

      Article first published online: 6 FEB 2009 | DOI: 10.1002/adma.200802722

      Thumbnail image of graphical abstract

      P3HT films that are highly anisotropic in-plane are produced using a directional crystallization technique, and the charge-transport properties of grain bourdaries between different orientations of crystallites are studied. Boundaries along the fiber provide a small barrier to charge transport when compared to fiber-to-fiber grain boundaries. The films allow a correlation to be drawn between the grain-boundary type and charge-transport behavior in P3HT.

    3. High Electron Mobility and Ambient Stability in Solution-Processed Perylene-Based Organic Field-Effect Transistors (pages 1573–1576)

      Claudia Piliego, Dorota Jarzab, Giuseppe Gigli, Zhihua Chen, Antonio Facchetti and Maria Antonietta Loi

      Article first published online: 13 FEB 2009 | DOI: 10.1002/adma.200803207

      Thumbnail image of graphical abstract

      Bottom-contact n-channel OFETs based on spin-coated films of N,N′-1H,1H-perfluorobutyl dicyanoperylenediimide (PDI-FCN2) exhibit a saturation-regime mobility of 0.15 cm2 V−1 s−1 in vacuum and good air stability. These performances are attributed to the high crystallinity and to the edge-on orientation promoted by the thermal treatment, as showed by confocal laser microscopy.

    4. Photoluminescent Peptide Nanotubes (pages 1577–1581)

      Jungki Ryu, Seong Yoon Lim and Chan Beum Park

      Article first published online: 2 FEB 2009 | DOI: 10.1002/adma.200802700

      Thumbnail image of graphical abstract

      Photoluminescent peptide nanotubes are synthesized in an in situ incorporation of lanthanide complexes into peptide nanotubes through a self-assembly process. We found that peptide nanotubes and photosensitizer molecules exhibited a high synergistic effect on the enhancement of lanthanide photoluminescence through a cascaded energy-transfer mechanism.

    5. Highly Conductive Sheets from Millimeter-Long Single-Walled Carbon Nanotubes and Ionic Liquids: Application to Fast-Moving, Low-Voltage Electromechanical Actuators Operable in Air (pages 1582–1585)

      Ken Mukai, Kinji Asaka, Takushi Sugino, Kenji Kiyohara, Ichiroh Takeuchi, Naohiro Terasawa, Don N. Futaba, Kenji Hata, Takanori Fukushima and Takuzo Aida

      Article first published online: 2 FEB 2009 | DOI: 10.1002/adma.200802817

      Thumbnail image of graphical abstract

      Ionic liquids allow millimeter-long single-walled carbon nanotubes to associate tightly, forming a free-standing sheet with superb mechanical and electrical properties. An actuator strip, fabricated by sandwiching an ionic-liquid-gel electrolyte layer with the nanotubes sheets obtained exhibits a large deformation in quick response (4 mm per 0.05 s) to low applied voltages, and a high durability upon 10 000 times continuous operations.

    6. Microemulsion Approach to Nanocontainers and Its Variability in Composition and Filling (pages 1586–1590)

      Henriette Gröger, Fabian Gyger, Peter Leidinger, Christian Zurmühl and Claus Feldmann

      Article first published online: 2 FEB 2009 | DOI: 10.1002/adma.200802972

      Thumbnail image of graphical abstract

      KSCN and phenylalanine are encapsulated with nanoscale hollow spheres acting as containers. These hollow spheres, composed of Au, CuS, AlO(OH), or SnO2, and can be prepared using a microemulsion technique, and yield particles with outer diameters of 15–30 nm and wall thicknesses of 2–10 nm.

    7. Electric-Field-Responsive Lithium-Ion Conductors of Propylenecarbonate-Based Columnar Liquid Crystals (pages 1591–1594)

      Harutoki Shimura, Masafumi Yoshio, Atsushi Hamasaki, Tomohiro Mukai, Hiroyuki Ohno and Takashi Kato

      Article first published online: 29 JAN 2009 | DOI: 10.1002/adma.200802252

      Thumbnail image of graphical abstract

      One-dimensional lithium-ion conductors responsive to electric fields are prepared by the complexation of a columnar propylenecarbonate-based liquid crystal and lithium triflate. The assemblies are aligned macroscopically by an alternating electric field, and they transport ions along the columnar axes.

    8. Optically Transparent Nanofiber Paper (pages 1595–1598)

      Masaya Nogi, Shinichiro Iwamoto, Antonio Norio Nakagaito and Hiroyuki Yano

      Article first published online: 3 FEB 2009 | DOI: 10.1002/adma.200803174

      Thumbnail image of graphical abstract

      Optically transparent paper of densely packed cellulose nanofibers is prepared without any additives. This material has the same chemical constituents as conventional paper, the only difference being the fiber width and the size of the interstitial cavities. This optically transparent paper exhibits high Young's modulus, high strength, ultralow CTE, and high foldability.

    9. A Random Sequential Adsorption Model for Protein Adsorption to Surfaces Functionalized with Poly(ethylene oxide) (pages 1599–1604)

      Parag Katira, Ashutosh Agarwal and Henry Hess

      Article first published online: 23 OCT 2008 | DOI: 10.1002/adma.200802057

      Thumbnail image of graphical abstract

      A random sequential adsorption model for the adsorption of proteins to surfaces functionalized with poly(ethylene oxide)/poly(ethylene glycol) at a range of molecular weights and grafting densities is presented. An excellent fit of the model predictions to experimental results suggests that the random arrangement of polymer chains leading to polymer-free “bald” spots is a critical factor in primary protein adsorption.

    10. Micrometer- and Nanometer-Sized, Single-Crystalline Ribbons of a Cyclic Triphenylamine Dimer and Their Application in Organic Transistors (pages 1605–1608)

      Rongjin Li, Hongxiang Li, Yabin Song, Qingxin Tang, Yaling Liu, Wei Xu, Wenping Hu and Daoben Zhu

      Article first published online: 29 JAN 2009 | DOI: 10.1002/adma.200802589

      Thumbnail image of graphical abstract

      A cyclic triphenylamine dimer with high crystallinity is demonstrated. Micrometer- and nanometer-sized single-crystalline ribbons are easily produced by a physical vapor transport technique. Field-effect transistors of the ribbons exhibit mobilities up to 0.05 cm2 V−1 s−1. The mobility of the devices depends greatly on the size of the ribbons: the smaller the ribbons, the higher the mobility.

    11. Metal-Containing Carbon Nitride Compounds: A New Functional Organic–Metal Hybrid Material (pages 1609–1612)

      Xinchen Wang, Xiufang Chen, Arne Thomas, Xianzhi Fu and Markus Antonietti

      Article first published online: 23 JAN 2009 | DOI: 10.1002/adma.200802627

      Thumbnail image of graphical abstract

      The electronic and optical functions of polymeric C3N4 can be easily modified by the inclusion of metal species such as Fe in its structure. The metal species lowers the bandgap and expands the light absorption of the material further into the visible region of the electromagnetic spectrum, while keeping a sufficient overpotential for carrying out oxidation reactions.

    12. Ultralow-Threshold Laser Realized in Zinc Oxide (pages 1613–1617)

      Hai Zhu, Chong-Xin Shan, Bin Yao, Bing-Hui Li, Ji-Ying Zhang, Zheng-Zhong Zhang, Dong-Xu Zhao, De-Zhen Shen, Xi-Wu Fan, You-Ming Lu and Zi-Kang Tang

      Article first published online: 28 JAN 2009 | DOI: 10.1002/adma.200802907

      Thumbnail image of graphical abstract

      Lasing action is realized in a ZnO/GaN heterojunction by employing a MgO interlayer. The MgO layer can confine electrons in the ZnO layer, while holes can pass through the MgO layer and enter into the n-ZnO layer from the p-GaN layer. The threshold of the lasing action is as low as 0.8 mA..

    13. Efficiency Enhancement of GaAs Photovoltaics Employing Antireflective Indium Tin Oxide Nanocolumns (pages 1618–1621)

      Peichen Yu, Chia-Hua Chang, Ching-Hua Chiu, Chin-Sheng Yang, Jue-Chin Yu, Hao-Chung Kuo, Shih-Hsin Hsu and Yia-Chung Chang

      Article first published online: 22 JAN 2009 | DOI: 10.1002/adma.200802563

      Thumbnail image of graphical abstract

      Highly-oriented indium tin oxide nanocolumns are prepared by glancing-angle deposition with nitrogen. The tapered column profiles, which function as a graded-refractive-index layer, offer superior antireflective characteristics. The nanostructured material serves as the conductive antireflective layer for GaAs solar cells, demonstrating a viable efficiency-boosting strategy for next-generation photovoltaics.

    14. Calamitic Liquid-Crystalline Elastomers Swollen in Bent-Core Liquid-Crystal Solvents (pages 1622–1626)

      Martin Chambers, Rafael Verduzco, James T. Gleeson, Samuel Sprunt and Antal Jákli

      Article first published online: 29 JAN 2009 | DOI: 10.1002/adma.200802739

      Thumbnail image of graphical abstract

      The swelling of calamitic liquid crystal elastomers (LCEs) with bent-core mesogens is investigated in the isotropic phase of both materials. The swelling magnitude and dynamics are determined and fitted with a dual exponential. The host LCEs imbibe bent-core molecules up to 30– 40 mol%. The swollen elastomers exhibit nematic phases, with some possessing a lower temperature smectic phase.

    15. Emerging N-Type Redox-Active Radical Polymer for a Totally Organic Polymer-Based Rechargeable Battery (pages 1627–1630)

      Takeo Suga, Hiroki Ohshiro, Shuhei Sugita, Kenichi Oyaizu and Hiroyuki Nishide

      Article first published online: 2 FEB 2009 | DOI: 10.1002/adma.200803073

      Thumbnail image of graphical abstract

      A n-type and redox-active radical polymer bearing galvinoxyl radicals, poly(galvinoxylstyrene), is utilized as an anode-active material, which enabled, for the first time, the fabrication of a totally organic polymer- based rechargeable battery in conjunction with p-type redox-active radical polymer. This battery was characterized by its remarkably high power rate capability.

    16. Improvements in Stability and Performance of N,N′-Dialkyl Perylene Diimide-Based n-Type Thin-Film Transistors (pages 1631–1635)

      Yugeng Wen, Yunqi Liu, Chong-an Di, Ying Wang, Xiangnan Sun, Yunlong Guo, Jian Zheng, Weiping Wu, Shanghui Ye and Gui Yu

      Article first published online: 28 JAN 2009 | DOI: 10.1002/adma.200802934

      Thumbnail image of graphical abstract

      The stability and performance of N,N′-dioctyl perylene diimide (PDI-C8) and N,N′-ditridecyl perylene diimide (PDI-C13) thin-film transistors (TFTs) are increased using optimized growth rates and sulfur-modified top-contact electrodes. Changing the grain size and the depth of grain boundaries by controlling film growth rate is another way of increasing the air stability of perylene diimides without electron-withdrawing groups.

    17. One-Pot Solution Synthesis of Cubic Cobalt Nanoskeletons (pages 1636–1640)

      Xi Wang, Hongbing Fu, Aidong Peng, Tianyou Zhai, Ying Ma, Fangli Yuan and Jiannian Yao

      Article first published online: 9 MAR 2009 | DOI: 10.1002/adma.200801309

      Thumbnail image of graphical abstract

      Cubic Co nanoskeletons with an edge length of 100 nm are prepared by a facile one-pot solution method. The cubic Co nanoskeletons synthesized exhibit excellent magnetic properties and mesopore structures. This work may provide an easy way to control the synthesis of hollow metal nanopolyhedra by introducing an appropriate etching agent into the synthetic process.

  9. Research News

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Vital Statistics
    6. Comments
    7. Review Article
    8. Frontispiece
    9. Communications
    10. Research News
    11. Index
    1. Stacking the Nanochemistry Deck: Structural and Compositional Diversity in One-Dimensional Photonic Crystals (pages 1641–1646)

      Leonardo D. Bonifacio, Bettina V. Lotsch, Daniel P. Puzzo, Francesco Scotognella and Geoffrey A. Ozin

      Article first published online: 29 JAN 2009 | DOI: 10.1002/adma.200802348

      Thumbnail image of graphical abstract

      The development of active photonic crystals is a theme of great interest for a wide variety of applications. In this article, we address the structural and compositional diversity attainable in novel one-dimensional photonic structures known as Bragg stacks or Bragg mirrors made from well-known nanomaterials. The unification of various materials properties with structural color and active color tuning provides new chemical opportunities for the development of functional structures for a range of perceived applications from sensors to switches, delivery systems to catalysts.

  10. Index

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Vital Statistics
    6. Comments
    7. Review Article
    8. Frontispiece
    9. Communications
    10. Research News
    11. Index
    1. Author Index and Subject Index Adv. Mater. 16/2009 (pages 1647–1648)

      Article first published online: 21 APR 2009 | DOI: 10.1002/adma.200990056

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