Advanced Materials

Cover image for Vol. 22 Issue 17

May 4, 2010

Volume 22, Issue 17

Pages 1891–1981

  1. Cover Picture

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Editorial
    6. Communications
    7. Frontispiece
    8. Communications
    9. Research News
    1. The University of Science and Technology of China: (Adv. Mater. 17/2010)

      Article first published online: 28 APR 2010 | DOI: 10.1002/adma.201090057

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      Through this Special Issue, the guest editors Younan Xia and Shuhong Yu would like to present a gold medal to the University of Science and Technology of China (USTC) for outstanding achievements in producing a cadre of well-trained, independent investigators who can proficiently spearhead cutting-edge research in advanced materials and nanotechnology. Sixteen of them are featured in this Special Issue. The cover was designed by Jie Zeng.

  2. Inside Front Cover

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Editorial
    6. Communications
    7. Frontispiece
    8. Communications
    9. Research News
    1. Hefei National Laboratory: (Adv. Mater. 17/2010)

      Article first published online: 28 APR 2010 | DOI: 10.1002/adma.201090058

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      The inside cover shows the Hefei National Laboratory for Physical Sciences at the Microscale (HFNL), which was established in 2003 on the USTC campus by the Ministry of Science and Technology (MOST) of China. It was founded on a multidisciplinary approach, with a focus on both national strategic demands and frontier basic research. Research at HNFL involves physics, chemistry, biology, materials science, and information technology in a highly integrated fashion.

  3. Contents

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Editorial
    6. Communications
    7. Frontispiece
    8. Communications
    9. Research News
    1. Contents: (Adv. Mater. 17/2010) (pages 1891–1896)

      Article first published online: 28 APR 2010 | DOI: 10.1002/adma.201090059

  4. Editorial

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Editorial
    6. Communications
    7. Frontispiece
    8. Communications
    9. Research News
    1. You have free access to this content
      USTC: A Powerhouse of Talent (pages 1897–1899)

      Younan Xia and Shuhong Yu

      Article first published online: 28 APR 2010 | DOI: 10.1002/adma.201000203

  5. Communications

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Editorial
    6. Communications
    7. Frontispiece
    8. Communications
    9. Research News
    1. 2,4,6-Trinitrotoluene (TNT) Chemical Sensing Based on Aligned Single-Walled Carbon Nanotubes and ZnO Nanowires (pages 1900–1904)

      Po-Chiang Chen, Saowalak Sukcharoenchoke, Koungmin Ryu, Lewis Gomez de Arco, Alexander Badmaev, Chuan Wang and Chongwu Zhou

      Article first published online: 25 MAR 2010 | DOI: 10.1002/adma.200904005

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      Nanotube/nanowire chemical sensors have attracted significant attention for the detection of explosives and nerve agents. We report TNT sensors based on aligned carbon nanotubes transferred onto fabric as prototype wearable sensors, with an excellent sensitivity down to 8 ppb at room temperature. In addition, we also fabricated TNT sensors based on ZnO nanowires with a detection limit of 40 ppb at room temperature. Those sensors have great potential for electronic nose systems.

    2. Tailored Synthesis of Superparamagnetic Gold Nanoshells with Tunable Optical Properties (pages 1905–1909)

      Qiao Zhang, Jianping Ge, James Goebl, Yongxing Hu, Yugang Sun and Yadong Yin

      Article first published online: 22 FEB 2010 | DOI: 10.1002/adma.200903748

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      Multifunctional Au nanoshells with tunable optical properties and fast magnetic response have been fabricated through a sequence of sol–gel, surface-protected etching, and seed-mediated growth processes. The use of a porous silica layer enhances the uniformity of nanoshell growth, the reproducibility of the synthesis, and the structural and optical stability of the products.

    3. Room-Temperature Formation of Hollow Cu2O Nanoparticles (pages 1910–1914)

      Ling-I Hung, Chia-Kuang Tsung, Wenyu Huang and Peidong Yang

      Article first published online: 26 FEB 2010 | DOI: 10.1002/adma.200903947

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      Monodisperse Cu and Cu2O nanoparticles (NPs) are synthesized using tetradecylphosphonic acid as a capping agent. Dispersing the NPs in chloroform and hexane at room temperature results in the formation of hollow Cu2O NPs and Cu@Cu2O core/shell NPs, respectively. The monodisperse Cu2O NPs are used to fabricate hybrid solar cells with efficiency of 0.14% under AM 1.5 and 1 Sun illumination.

    4. Thiolate-Protected Aun Nanoclusters as Catalysts for Selective Oxidation and Hydrogenation Processes (pages 1915–1920)

      Yan Zhu, Huifeng Qian, Manzhou Zhu and Rongchao Jin

      Article first published online: 22 FEB 2010 | DOI: 10.1002/adma.200903934

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      Thiolate-protected Aun clusters are exploited as homogeneous and supported catalysts for two chemical processes: i) the selective oxidation of styrene by O2 to benzaldehyde and ii) the chemoselective hydrogenation of α,β-unsaturated ketone to α,β-unsaturated alcohol. The results demonstrate that a quantum-size effect in Aun clusters plays a critical role in their catalysis. This work highlights the importance of pursuing quantum-sized gold clusters for catalysis.

    5. Morphology-Controlled Synthesis of Platinum Nanocrystals with Specific Peptides (pages 1921–1925)

      Yujing Li and Yu Huang

      Article first published online: 4 MAR 2010 | DOI: 10.1002/adma.200903944

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      Multipod Pt nanocrystals with good uniformity are synthesized using a Pt-binding peptide as the capping agent. The pod length can be tuned by varying peptide concentrations. With high electrochemical surface areas, these nanocrystals can potentially be used as catalysts in electrocatalytic applications.

    6. NixCo3−xO4 Nanowire Arrays for Electrocatalytic Oxygen Evolution (pages 1926–1929)

      Yanguang Li, Panitat Hasin and Yiying Wu

      Article first published online: 22 FEB 2010 | DOI: 10.1002/adma.200903896

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      NixCo3−xO4 nanowire arrays are grown on a Ti foil for efficient oxygen evolution reactions. Ni-doped nanowire arrays have higher electrocatalytic activity than pure Co3O4. The success of the nanowire electrodes results from their high surface areas and direct electron contact to the conductive substrate.

    7. Seed-Mediated Synthesis of Truncated Gold Decahedrons with a AuCl/Oleylamine Complex as Precursor (pages 1930–1934)

      Yanyun Ma, Jie Zeng, Weiyang Li, Maureen McKiernan, Zhaoxiong Xie and Younan Xia

      Article first published online: 17 MAR 2010 | DOI: 10.1002/adma.200903930

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      A seed-mediated growth method is described for the synthesis of a novel type of Au nanoparticles—truncated decahedrons with a pentagonal, platelike structure (see figure). The precursor is based on the AuCl/oleylamine complex. TEM analyses reveal that the truncated Au nanoparticle has two types of truncation: one is parallel to the five-fold axis and the other is perpendicular to the five-fold axis.

  6. Frontispiece

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Editorial
    6. Communications
    7. Frontispiece
    8. Communications
    9. Research News
    1. Hybrid Nanocrystals: Gold-Based Hybrid Nanocrystals Through Heterogeneous Nucleation and Growth (Adv. Mater. 17/2010)

      Jie Zeng, Jianliu Huang, Chi Liu, Cheng Hao Wu, Yue Lin, Xiaoping Wang, Shuyuan Zhang, Jianguo Hou and Younan Xia

      Article first published online: 28 APR 2010 | DOI: 10.1002/adma.201090060

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      A facile method for the synthesis of gold-based hybrid nanocrystals is presented by Jianguo Hou and co-workers on p. 1936. Pre-synthesized nanocrystal seeds of CdSe, PbSe, FePt, Cu2O, or FePt–CdS are used for controlled heterogeneous nucleation and growth of gold. The frontispiece shows model structures of such hybrid nanocrystals.

  7. Communications

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Editorial
    6. Communications
    7. Frontispiece
    8. Communications
    9. Research News
    1. Gold-Based Hybrid Nanocrystals Through Heterogeneous Nucleation and Growth (pages 1936–1940)

      Jie Zeng, Jianliu Huang, Chi Liu, Cheng Hao Wu, Yue Lin, Xiaoping Wang, Shuyuan Zhang, Jianguo Hou and Younan Xia

      Article first published online: 17 MAR 2010 | DOI: 10.1002/adma.200903982

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      A facile method for the synthesis of Au-based hybrid nanocrystals is described by employing pre-synthesized nanocrystals as seeds for heterogeneous nucleation and growth of Au. The seeds are CdSe, PbSe, FePt, Cu2O, or FePt–CdS nanocrystals. The sites of heterogeneous nucleation can be accurately controlled for nanocrystal seeds with a nonspherical shape.

    2. High-Performance Top-Gated Graphene-Nanoribbon Transistors Using Zirconium Oxide Nanowires as High-Dielectric-Constant Gate Dielectrics (pages 1941–1945)

      Lei Liao, Jingwei Bai, Yung-Chen Lin, Yongquan Qu, Yu Huang and Xiangfeng Duan

      Article first published online: 4 MAR 2010 | DOI: 10.1002/adma.200904415

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      A new strategy for integrating high-dielectric-constant (high-k) dielectrics with graphene nanoribbon (GNR) is presented. Freestanding zirconium oxide nanowires are synthesized and subsequently assembled on top of GNRs as high-k gate dielectrics for top-gated GNR transistors with unprecedented performance.

  8. Research News

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Editorial
    6. Communications
    7. Frontispiece
    8. Communications
    9. Research News
    1. Glyconanomaterials: Synthesis, Characterization, and Ligand Presentation (pages 1946–1953)

      Xin Wang, Olof Ramström and Mingdi Yan

      Article first published online: 17 MAR 2010 | DOI: 10.1002/adma.200903908

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      Novel photocoupling chemistry for conjugation of un-derivatized carbohydrates to gold nanoparticles is reported. A fluorescence competition assay was developed to determine the apparent dissociation constants of synthesized glyconanoparticles (GNPs). Results showed that the binding affinities of GNPs were significantly affected by ligand size, density, and spacer linkage, demonstrating the power of nanomaterials as scaffolds that amplify the multivalency effect by ligand presentation.

    2. Graphene Oxide: Surface Activity and Two-Dimensional Assembly (pages 1954–1958)

      Franklin Kim, Laura J. Cote and Jiaxing Huang

      Article first published online: 28 APR 2010 | DOI: 10.1002/adma.200903932

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      Graphene oxide (GO) has recently become an actively explored material for graphene-related electronics applications. Due to its highly anisotropic structure, the collective properties of the sheets are strongly dependent on how they are assembled; therefore, understanding and controlling the assembly of GO sheets becomes an important challenge. In this Research News article, the amphiphilic nature of GO and how it can be utilized for preparing 2D assemblies (see figure) is discussed.

    3. Nanostructures for Thermoelectric Applications: Synthesis, Growth Mechanism, and Property Studies (pages 1959–1962)

      Genqiang Zhang, Qingxuan Yu, Wei Wang and Xiaoguang Li

      Article first published online: 1 MAR 2010 | DOI: 10.1002/adma.200903812

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      V–VI-based heterostructures and hollow nanostructures can be synthesized using chemical methods, which may offer great opportunities for the enhancement of thermoelectric performance and thus contribute to the applications of thermoelectric devices. The figure shows a schematic image of high-quality nanostructures for potential applications in high-performance devices with a high thermoelectric figure of merit.

    4. Synthetic Methodologies for Carbon Nanomaterials (pages 1963–1966)

      Zhaoping Liu, Xufeng Zhou and Yitai Qian

      Article first published online: 22 FEB 2010 | DOI: 10.1002/adma.200903813

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      A number of synthetic methodologies for carbon nanomaterial, including solvothermal reduction, solvothermal pyrolysis, hydrothermal carbonization, and soft-chemical exfoliation are highlighted in this Research News article (see figure).

    5. Controlling Electronic States and Transport Properties at the Level of Single Molecules (pages 1967–1971)

      Shuan Pan, Aidi Zhao, Bing Wang, Jinlong Yang and Jianguo Hou

      Article first published online: 17 MAR 2010 | DOI: 10.1002/adma.200903795

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      Functionalized single molecules will be key elements in future molecular electronics. Benefiting from a powerful technique, scanning tunneling microscopy, one has been able to control the transport properties, such as rectifying, negative differential resistance (NDR), and switching effects, at the single-molecule level, providing a promising alternative to conventional electronics towards the ultimate miniaturization of molecular electronic devices through the bottom-up strategy.

    6. New Vanadium Oxide Nanostructures: Controlled Synthesis and Their Smart Electrical Switching Properties (pages 1972–1976)

      Changzheng Wu, He Wei, Bo Ning and Yi Xie

      Article first published online: 22 FEB 2010 | DOI: 10.1002/adma.200903890

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      Controlling the different polymorphs of vanadium oxide provides an intriguing way to meet the challenges presented by energy-efficiency issues. Here, our recent advances in the development of new vanadium oxide materials and their promising electrical switching properties are summarized. An example of the use of such properties is shown in the figure: a smart device that can selectively filter out infrared light.

    7. Coaxial Metal Nano-/Microcables with Isolating Sheath: Synthetic Methodology and Their Application as Interconnects (pages 1977–1981)

      Min-Rui Gao, Wei-Hong Xu, Lin-Bao Luo, Yong-Jie Zhan and Shu-Hong Yu

      Article first published online: 11 MAR 2010 | DOI: 10.1002/adma.200903805

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      Coaxial metal nano-/microcables can be synthesized conveniently via solution strategies, such as hydrothermal carbonization and the so-called synergistic soft–hard template method. These nano-/microcables could be ideal candidates as interconnects in fabricating future nano-/microscale devices (see figure).

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