Advanced Materials

Cover image for Vol. 22 Issue 36

September 22, 2010

Volume 22, Issue 36

Pages 3963–4083

  1. Cover Picture

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Review
    6. Communications
    7. Research News
    1. Multifunctional Nanoparticles: Photocoercivity of Nano-Stabilized Au:Fe Superparamagnetic Nanoparticles (Adv. Mater. 36/2010)

      Lapo Bogani, Lucia Cavigli, Cesár de Julián Fernández, Paolo Mazzoldi, Giovanni Mattei, Massimo Gurioli, Martin Dressel and Dante Gatteschi

      Version of Record online: 16 SEP 2010 | DOI: 10.1002/adma.201090118

      Thumbnail image of graphical abstract

      Light-induced switching of the coercive field of Au:Fe nanoparticles with exceptionally good magneto-optical response is reported on p. 4054 by Lapo Bogani and co-workers. Two separate processes are identified, both of which are exploitable for photocommutation. This innovative material allows a combination of appealing photoswitching properties with the advantages of traditional metallic NPs, opening the way to new multifunctional nanostructures.

  2. Inside Front Cover

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Review
    6. Communications
    7. Research News
    1. CNT Cytotoxicity: Carbon Nanotubes in the Biological Interphase: The Relevance of Noncovalence (Adv. Mater. 36/2010)

      Yeonju Lee and Kurt E. Geckeler

      Version of Record online: 16 SEP 2010 | DOI: 10.1002/adma.201090119

      Thumbnail image of graphical abstract

      With increasing interest in carbon nanotubes and their exposure to biological interphases, several methods for improving their biocompatibility have been suggested, such as the supramolecular and covalent functionalization, as reviewed by Kurt Geckeler and co-workers on p. 4076. Depending on the method of surface modification the interactions of the carbon nanotubes with the cells are shown to follow different pathways.

  3. Contents

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

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Review
    6. Communications
    7. Research News
    1. Nanostructured Thermoelectrics: Big Efficiency Gains from Small Features (pages 3970–3980)

      Christopher J. Vineis, Ali Shakouri, Arun Majumdar and Mercouri G. Kanatzidis

      Version of Record online: 26 JUL 2010 | DOI: 10.1002/adma.201000839

      Thumbnail image of graphical abstract

      Rapid growth in the thermoelectrics field has occurred over the past 15 years due to a new fundamental focus on nanostructured materials. While great advances have been made, there is still some confusion about the exact role that nanostructuring has played in affecting electrical and thermal properties. This review seeks to summarize and critically review achievements of nanostructured thermoelectrics, and discuss paths forward for further breakthroughs that will enable widespread commercial adoption of these materials.

  5. Communications

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Review
    6. Communications
    7. Research News
    1. Tunable Carbon Nanotube Thin-Film Transistors Produced Exclusively via Inkjet Printing (pages 3981–3986)

      Haruya Okimoto, Taishi Takenobu, Kazuhiro Yanagi, Yasumitsu Miyata, Hidekazu Shimotani, Hiromichi Kataura and Yoshihiro Iwasa

      Version of Record online: 20 AUG 2010 | DOI: 10.1002/adma.201000889

      Thumbnail image of graphical abstract

      Low-cost green manufacturing of single-walled carbon nanotube films via precisely controlled inkjet printing is demonstrated. This type of transistor exceeds the performance of conventional organic transistors, both in mobility and the on/off ratio. The production of exclusively inkjet-printed SWCNT transistors with printable ionic-liquid gate dielectrics is also shown.

    2. Stable Efficient Solid-State White-Light-Emitting Phosphor with a High Scotopic/Photopic Ratio Fabricated from Fused CdSe–Silica Nanocomposites (pages 3987–3991)

      Adrian Lita, Aaron L. Washington II, Lambertus van de Burgt, Geoffrey F. Strouse and A. E. Stiegman

      Version of Record online: 16 AUG 2010 | DOI: 10.1002/adma.201000493

      Thumbnail image of graphical abstract

      Stable, bright-white-light-emitting phosphor is fabricated from 5.5-nm CdSe quantum dots that are incorporated into a silica gel and calcined at 500 °C under air. Excited by UV radiation, the emitted light has almost pure white-light coordinates of (0.34, 0.36) on the CIE (Commission internationale de l’éclairage) chromaticity chart and a Scotopic/Photopic ratio of 2.56.

    3. Tailor-made Nanometer-scale Patterns of Photo-switchable Prussian Blue Analogues (pages 3992–3996)

      Sophie Lepoutre, David Grosso, Clément Sanchez, Giulia Fornasieri, Eric Rivière and Anne Bleuzen

      Version of Record online: 4 AUG 2010 | DOI: 10.1002/adma.200903768

      Thumbnail image of graphical abstract

      Combining the fascinating electronic properties of Prussian blue analogues and the exceptional processing possibilities inherent in nanostructured oxide chemistry, photo-switchable Prussian blue nanoparticles have been successfully grown within the well-defined craters of a TiO2 nanoperforated monolayer. Each Prussian blue particle can potentially act as a single memory bit.

    4. Large Laterally Ordered Nanochannel Arrays from DNA Combing and Imprinting (pages 3997–4001)

      Jingjiao Guan, Pouyan E. Boukany, Orin Hemminger, Nan-Rong Chiou, Weibin Zha, Megan Cavanaugh and L. James Lee

      Version of Record online: 20 AUG 2010 | DOI: 10.1002/adma.201000136

      Thumbnail image of graphical abstract

      We employed patterned surfaces to guide DNA combing in a de-wetting process to form laterally ordered DNA nanostrands. A simple resin imprinting method then converted this structure into nanochannels micro- or nanowell arrays.

    5. Intrinsic Topological Insulator Bi2Te3 Thin Films on Si and Their Thickness Limit (pages 4002–4007)

      Yao-Yi Li, Guang Wang, Xie-Gang Zhu, Min-Hao Liu, Cun Ye, Xi Chen, Ya-Yu Wang, Ke He, Li-Li Wang, Xu-Cun Ma, Hai-Jun Zhang, Xi Dai, Zhong Fang, Xin-Cheng Xie, Ying Liu, Xiao-Liang Qi, Jin-Feng Jia, Shou-Cheng Zhang and Qi-Kun Xue

      Version of Record online: 20 JUL 2010 | DOI: 10.1002/adma.201000368

      Thumbnail image of graphical abstract

      High-quality Bi2Te3 films can be grown on Si by the state-of-art molecular beam epitaxy technique. In situ ARPES measurement reveals that the as-grown films are intrinsic topological insulators and the single-Dirac-cone surface state develops at a thickness of two quintuple layers. The work opens a new avenue for engineering of topological materials based on well-developed Si technology.

    6. Single-InN-Nanowire Nanogenerator with Upto 1 V Output Voltage (pages 4008–4013)

      Chi-Te Huang, Jinhui Song, Chung-Min Tsai, Wei-Fan Lee, Der-Hsien Lien, Zhiyuan Gao, Yue Hao, Lih-Juann Chen and Zhong Lin Wang

      Version of Record online: 30 JUL 2010 | DOI: 10.1002/adma.201000981

      Thumbnail image of graphical abstract

      Piezoelectric potential of a InN nanowire (NW) growing along [0110] can be positive, negative, and zero depending on the direction of the applied transverse force. By measuring the output voltage of a InN-NW-based nanogenerator, about 40% to 55% of output voltages are within the range of -1 and -20 mV, and 25% to 30% of output voltages would exceed -100 mV. Some output voltages could reach the magnitude of -1000 mV, showing its great potential for fabricating high-output nanogenerators.

    7. An Anisotropic Etching Effect in the Graphene Basal Plane (pages 4014–4019)

      Rong Yang, Lianchang Zhang, Yi Wang, Zhiwen Shi, Dongxia Shi, Hongjun Gao, Enge Wang and Guangyu Zhang

      Version of Record online: 3 AUG 2010 | DOI: 10.1002/adma.201000618

      Thumbnail image of graphical abstract

      A highly controllable, dry, anisotropic etching technique for graphene sheets has been achieved using hydrogen plasma etching. Zigzag edge formation was achieved by starting the etching at edges and defects and depends strongly on crystallographic orientation of the graphene. This dry, anisotropic etching approach combined with the standard lithographic technique is ideal for scalable graphene tailoring because the etching rates can be precisely controlled and the quality of the graphene can be preserved.

    8. Three-Dimensional Carrier Profiling of Individual Si Nanowires by Scanning Spreading Resistance Microscopy (pages 4020–4024)

      Xin Ou, Pratyush Das Kanungo, Reinhard Kögler, Peter Werner, Ulrich Gösele, Wolfgang Skorupa and Xi Wang

      Version of Record online: 16 AUG 2010 | DOI: 10.1002/adma.201001086

      Thumbnail image of graphical abstract

      Three-dimensional profiling of nanowires is carried out by repeatedly scanning the same nanowire with controlled force of the probing tip. This method abrades material from the measured cross section during each scan, allowing three-dimensional profiling. The typical shape of an individual Si nanowire, measured by SEM, and the respective resistivity images of several cross sections obtained by scanning spreading resistance microscopy are shown.

    9. Optical Properties of Multiple-Split Nanophotonic Ring Antennae (pages 4025–4029)

      Alasdair W. Clark and Jonathan M. Cooper

      Version of Record online: 18 JUN 2010 | DOI: 10.1002/adma.201000131

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      Simulated plasmonic activity is reported for a series of Au nanoring antennae with 1–5 splits in their geometry. The rings have a radius of 75 nm and splits of 3–6 nm. By controlling the size of the splits, their location and the radius of the ring structure, we can control the number, intensity and frequency of the plasmonic hotspots.

    10. High-Density Stretchable Electronics: Toward an Integrated Multilayer Composite (pages 4030–4033)

      Liang Guo and Stephen P. DeWeerth

      Version of Record online: 17 AUG 2010 | DOI: 10.1002/adma.201000515

      Thumbnail image of graphical abstract

      High-density stretchable electronics are achieved using multilayer interconnects on an elastomeric substrate. Two major challenges associated with stretchable electronics—increasing integration density and improving electrical bonding—have been addressed by our innovative multilayer via-bonding technology. The resulting multichip-module architecture provides an elastic, high-density solution for numerous potential applications.

    11. Diffusion of Adhesion Layer Metals Controls Nanoscale Memristive Switching (pages 4034–4038)

      J. Joshua Yang, John Paul Strachan, Qiangfei Xia, Douglas A. A. Ohlberg, Philip J. Kuekes, Ronald D. Kelley, William F. Stickle, Duncan R. Stewart, Gilberto Medeiros-Ribeiro and R. Stanley Williams

      Version of Record online: 30 JUL 2010 | DOI: 10.1002/adma.201000663

      Thumbnail image of graphical abstract

      Thermal diffusion of Ti through Pt electrode forms Ti atom channels of 1 nm diameter along Pt grain boundaries, seeding switching centers and controlling nanoscale memristive switching. The image shows EFTEM maps of Ti overlaid on HRTEM images for a Si/SiO2 100 nm/Ti 5nm/Pt 15 nm sample in-situ annealed in ultrahigh vacuum at 250 °C for 1 hour.

    12. Ultrafast Manipulation of Self-Assembled Form Birefringence in Glass (pages 4039–4043)

      Yasuhiko Shimotsuma, Masaaki Sakakura, Peter G. Kazansky, Martynas Beresna, Jiarong Qiu, Kiyotaka Miura and Kazuyuki Hirao

      Version of Record online: 23 AUG 2010 | DOI: 10.1002/adma.201000921

      Thumbnail image of graphical abstract

      Ultrafast writing dynamics of form birefringence is experimentally demonstrated. Based on this anisotropic response created by photoinduced self-organization, rewritable 5D (X,Y,Z, birefringence slow axis direction, and retardance) optical data storage is realized by using liquid-crystal technology (see figure).

      Corrected by:

      Correction: Correction: Ultrafast Manipulation of Self-Assembled Form Birefringence in Glass

      Vol. 22, Issue 48, 5442, Version of Record online: 15 DEC 2010

    13. Reversible Conversion of the Majority Carrier Type in Solution-Processed Ambipolar Quinoidal Oligothiophene Thin Films (pages 4044–4048)

      Jean-Charles Ribierre, Satoshi Watanabe, Mutsuyoshi Matsumoto, Tsuyoshi Muto, Aiko Nakao and Tetsuya Aoyama

      Version of Record online: 30 JUL 2010 | DOI: 10.1002/adma.201001170

      Thumbnail image of graphical abstract

      Solution-processed organic field-effect transistors based on the ambipolar quinoidal oligothiophene [QQT(CN)4] show either p- or n-type dominant behavior depending on the solvent used for the spin-coating of the semiconducting organic thin film. In addition, majority carrier type conversion from n-type to ambipolar is achieved by solvent vapor treatment.

    14. Synergistic Cancer Therapeutic Effects of Locally Delivered Drug and Heat Using Multifunctional Nanoparticles (pages 4049–4053)

      Sun-Mi Lee, Huiyul Park and Kyung-Hwa Yoo

      Version of Record online: 21 JUL 2010 | DOI: 10.1002/adma.201001040

      Thumbnail image of graphical abstract

      Doxorubicin-loaded PEG-PLGA-Au half-shell nanoparticles provide multifunctions, such as photothermal treatment, photothermally controlled drug delilvery, and in vivo optical imaging. In addition, the combined doxorubicin and photothermal treatments using these multifunctional nanoparticles show synergistic therapeutic effects.

    15. Photocoercivity of Nano-Stabilized Au:Fe Superparamagnetic Nanoparticles (pages 4054–4058)

      Lapo Bogani, Lucia Cavigli, Cesár de Julián Fernández, Paolo Mazzoldi, Giovanni Mattei, Massimo Gurioli, Martin Dressel and Dante Gatteschi

      Version of Record online: 31 AUG 2010 | DOI: 10.1002/adma.201002295

      Thumbnail image of graphical abstract

      We demonstrate light-induced switching of the coercive field of true nano-stabilized Au:Fe nanoparticles with exceptionally good magneto-optical response. Two separate processes are identified, both exploitable for photocommutation. This innovative material allows combining appealing photoswitching properties with the advantages of traditional metallic nanoparticles, opening the way to new multifunctional nanostructures.

    16. Direct Growth of Aligned Zinc Oxide Nanorods on Paper Substrates for Low-Cost Flexible Electronics (pages 4059–4063)

      Afsal Manekkathodi, Ming-Yen Lu, Chun Wen Wang and Lih-Juann Chen

      Version of Record online: 7 JUN 2010 | DOI: 10.1002/adma.201001289

      Thumbnail image of graphical abstract

      Aligned ZnO nanorods are grown directly on a most economic, highly flexible, and environmentally benign paper substrate for the first time. Prototype photoconducting devices and PN junction diodes are fabricated based on these ZnO nanorod arrays, which can be strategically exploited for other functional devices and integrated with various optoelectronic device components.

    17. Alkali Metal Doped Organic Molecules on Insulators: Charge Impact on the Optical Properties (pages 4064–4070)

      Thomas Dienel, Andreas Krause, Ronald Alle, Roman Forker, Klaus Meerholz and Torsten Fritz

      Version of Record online: 16 AUG 2010 | DOI: 10.1002/adma.201000891

      Thumbnail image of graphical abstract

      Doping-induced absorption changes of organic molecules on an insulating solid are reported. The charge transfer between alkali metal atoms and individual molecules on a surface leads to new electronic transitions identified with optical absorption spectroscopy. Progressive doping allows the discrimination of neutral, monoanionic and dianionic molecules in the solid state through examination of the spectra and rate equation modeling.

    18. Tensile Tests on Individual Single-Walled Carbon Nanotubes: Linking Nanotube Strength with Its Defects (pages 4071–4075)

      Ming-Sheng Wang, Dmitri Golberg and Yoshio Bando

      Version of Record online: 17 AUG 2010 | DOI: 10.1002/adma.201001463

      Thumbnail image of graphical abstract

      Theultimate tensile strength of individual single-walled carbon nanotubes (CNTs) is measured in a high-resolution TEM equipped with a conducting AFM unit. The values are correlated to every tube’s structural details. The strength of ∼100 GPa, approaching the theoretical limit for defect-free CNTs, is documented in tubes without visible defects; for those with spatially separated stepwise pentagon-heptagon defects, determining the breaking sites, it reduces to 40–70 GPa.

  6. Research News

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Review
    6. Communications
    7. Research News
    1. Carbon Nanotubes in the Biological Interphase: The Relevance of Noncovalence (pages 4076–4083)

      Yeonju Lee and Kurt E. Geckeler

      Version of Record online: 17 AUG 2010 | DOI: 10.1002/adma.201000746

      Thumbnail image of graphical abstract

      As a result of increasing interest in their biological applications, the interaction of carbon nanotubes in the biological interphase is a very important issue. The cytotoxicity of carbon nanotubes, the influence of their functionalization and their interactions with different mammalian cell lines are discussed and highlighted in this context.

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