Small

Cover image for Vol. 6 Issue 9

May 7 2010

Volume 6, Issue 9

Pages 979–1065

  1. Cover Picture

    1. Top of page
    2. Cover Picture
    3. Inside Cover
    4. Contents
    5. Communications
    6. Full Papers
    7. Corrigendum
    1. Biomimetics: Small 9/2010

      Young Min Song, Sung Jun Jang, Jae Su Yu and Yong Tak Lee

      Article first published online: 11 MAY 2010 | DOI: 10.1002/smll.201090026

      Thumbnail image of graphical abstract

      The cover image shows a scanning electron microscopy image of bioinspired subwavelength structures (SWS) with parabolic shape, which are fabricated by simple process steps based on the combination of laser interference lithography, thermal reflow, and subsequent pattern transfer. The insets depict the reflected light from the flat surface (top) and parabola-shaped SWS (bottom), respectively. The fabricated SWS with parabolic shape show antireflection properties over a broader wavelength range compared to that of a flat surface and even conventional cone-shaped SWS, thus opening up new possibilities for various optoelectronic device applications to improve optical performance. For more information, please read the Communication “Bioinspired Parabola Subwavelength Structures for Improved Broadband Antireflection” by Y. T. Lee el al., beginning on page 984.

  2. Inside Cover

    1. Top of page
    2. Cover Picture
    3. Inside Cover
    4. Contents
    5. Communications
    6. Full Papers
    7. Corrigendum
    1. Heteroepitaxy: Small 9/2010

      Chun-Hu Chen, Lei Jin, Anais E. Espinal, Brian T. Firliet, Linping Xu, Mark Aindow, Raymond Joesten and Steven L. Suib

      Article first published online: 11 MAY 2010 | DOI: 10.1002/smll.201090027

      Thumbnail image of graphical abstract

      The cover picture shows electron microscopy images of the produced nanoscale shell/fiber superstructure TiO2 on cryptomelane MnO2 (OMS-2) in a single-step aqueous reaction. Control of the nanostructure and orientation of materials is important but complicated in current nanotechnological applications. The discovery of size, shape, and array controls of TiO2 nanomaterials via heteroepitaxy offers a much simpler way to produce complex nanomaterials. The mechanism study shows that the nanoshell is formed prior to the surface nanofibers. The whole growth process is highly dependent on the interface misfits of materials. Thus, selected preparation of nanoshell or shell/fiber nanostructure is allowed for many materials research needs. This unique heteroepitaxy relationship is general for rutile oxides and potentially general for many different tunnel oxides. For more information, please read the Communication “Heteroepitaxial Growth of Nanoscale Oxide Shell/Fiber Superstructures by Mild Hydrothermal Processes” by S. L. Suib et al., beginning on page 988.

  3. Contents

    1. Top of page
    2. Cover Picture
    3. Inside Cover
    4. Contents
    5. Communications
    6. Full Papers
    7. Corrigendum
    1. Contents: Small 9/2010 (pages 979–983)

      Article first published online: 11 MAY 2010 | DOI: 10.1002/smll.201090028

  4. Communications

    1. Top of page
    2. Cover Picture
    3. Inside Cover
    4. Contents
    5. Communications
    6. Full Papers
    7. Corrigendum
    1. Biomimetics

      Bioinspired Parabola Subwavelength Structures for Improved Broadband Antireflection (pages 984–987)

      Young Min Song, Sung Jun Jang, Jae Su Yu and Yong Tak Lee

      Article first published online: 11 MAY 2010 | DOI: 10.1002/smll.201000079

      Thumbnail image of graphical abstract

      Subwavelength structures (SWSs) with a parabola shape are fabricated by a combination of laser interference lithography of a photoresist (PR), thermal reflow, and subsequent pattern transfer. The SWSs show antireflection properties in a broader wavelength range than conventional cone-shaped SWSs, and have potential in optoelectronics for improved device performance.

    2. Heteroepitaxy

      Heteroepitaxial Growth of Nanoscale Oxide Shell/Fiber Superstructures by Mild Hydrothermal Processes (pages 988–992)

      Chun-Hu Chen, Lei Jin, Anais E. Espinal, Brian T. Firliet, Linping Xu, Mark Aindow, Raymond Joesten and Steven L. Suib

      Article first published online: 3 MAY 2010 | DOI: 10.1002/smll.200902381

      Thumbnail image of graphical abstract

      A general method utilizing heteroepitaxy of various rutile-phase materials such as TiO2 and SnO2 is developed that allows control of pure phases, nanometer-sized particulates, production of oriented hollow rods, and controlled thickness of phases normally produced at elevated temperatures.

    3. Biosensors

      Direct Detection of Heroin Metabolites Using a Competitive Immunoassay Based on a Carbon-Nanotube Liquid-Gated Field-Effect Transistor (pages 993–998)

      J. N. Tey, S. Gandhi, I. P. M. Wijaya, Al. Palaniappan, J. Wei, I. Rodriguez, C. R. Suri and S. G. Mhaisalkar

      Article first published online: 14 APR 2010 | DOI: 10.1002/smll.200902139

      Thumbnail image of graphical abstract

      A carbon-nanotube-based liquid-gated field-effect transistor is employed for the detection of heroin narcotics. Detection of monoacetylmorphine down to 15 pg mL−1 is accomplished by means of a competitive immunoassay protocol in conjunction with charged Au nanoparticles that augment the electrostatic perturbance generated from the receptor–ligand interaction coupled with the carbon nanotubes.

    4. Biological nanoreactors

      Biomimetic Crystallization of Sulfide Semiconductor Nanoparticles in Aqueous Solution (pages 999–1002)

      Christophe Pejoux, Roberto de la Rica and Hiroshi Matsui

      Article first published online: 11 MAY 2010 | DOI: 10.1002/smll.200902121

      Thumbnail image of graphical abstract

      A new biomimetic approach is introduced for quantum-dot synthesis in aqueous solution. The sulfide concentration gradient around the nucleating urease is controlled by the degree of inhibition of the catalytic activity, and the optimized precursor gradient on the enzyme generates monodisperse and crystalline sulfide semiconductor nanoparticles.

  5. Full Papers

    1. Top of page
    2. Cover Picture
    3. Inside Cover
    4. Contents
    5. Communications
    6. Full Papers
    7. Corrigendum
    1. Drug delivery

      One-Step Fabrication of Triple-Layered Polymeric Microparticles with Layer Localization of Drugs as a Novel Drug-Delivery System (pages 1003–1011)

      Wei Li Lee, Effendi Widjaja and Say Chye Joachim Loo

      Article first published online: 31 MAR 2010 | DOI: 10.1002/smll.200901985

      Thumbnail image of graphical abstract

      Triple-layered microparticles are fabricated through a simple, versatile, one-step solvent evaporation technique. Control of the layer thickness and microparticle configurations, as well as drug localization in different layers, can be achieved. This microparticle design would allow for specific tailoring of particulate drug-delivery systems to suit a wide range of applications.

    2. Gold nanostructures

      Microbial Synthesis of Multishaped Gold Nanostructures (pages 1012–1021)

      Sujoy K. Das, Akhil R. Das and Arun K. Guha

      Article first published online: 7 APR 2010 | DOI: 10.1002/smll.200902011

      Thumbnail image of graphical abstract

      A simple, protein-mediated, green chemical methodology is proposed for the synthesis of multishaped (triangular, hexagonal, pentagonal, spherical, spheroidal, urchinlike, two-dimensional nanowires, and nanorods) gold nanostructures. The proteins function as a reducing, shape directing, and stabilizing agent.

    3. Drug delivery

      Near-Infrared Light Triggers Release of Paclitaxel from Biodegradable Microspheres: Photothermal Effect and Enhanced Antitumor Activity (pages 1022–1031)

      Jian You, Ruping Shao, Xin Wei, Sanjay Gupta and Chun Li

      Article first published online: 14 APR 2010 | DOI: 10.1002/smll.201000028

      Thumbnail image of graphical abstract

      Surface plasmon resonance absorption of hollow gold nanospheres embedded in poly(lactide-co-glycolide) (PLGA) microspheres (MS) mediates controllable release of paclitaxel from the microspheres upon irradiation with near-infrared light.

    4. Nanowire nucleation

      Gold-Catalyzed Vapor–Liquid–Solid Germanium-Nanowire Nucleation on Porous Silicon (pages 1032–1037)

      Makoto Koto, Ann F. Marshall, Irene A. Goldthorpe and Paul C. McIntyre

      Article first published online: 21 APR 2010 | DOI: 10.1002/smll.200901764

      Thumbnail image of graphical abstract

      Porous Si substrates, which have greater effective interparticle separations for Au surface diffusion than nonporous Si, inhibit gold catalyst particle coarsening and agglomeration prior to vapor–liquid–solid nanowire nucleation. This increases the yield and greatly reduces the variation in wire diameter and length compared to nucleation on nonporous Si.

    5. Metal-enhanced fluorescence

      Tuning the Intensity of Metal-Enhanced Fluorescence by Engineering Silver Nanoparticle Arrays (pages 1038–1043)

      Bingjie Yang, Nan Lu, Dianpeng Qi, Renping Ma, Qiong Wu, Juanyuan Hao, Xiaoming Liu, Ying Mu, Vincent Reboud, Nikolaos Kehagias, Clivia M. Sotomayor Torres, Freddy Yin Chiang Boey, Xiaodong Chen and Lifeng Chi

      Article first published online: 14 APR 2010 | DOI: 10.1002/smll.200902350

      Thumbnail image of graphical abstract

      Metal-enhanced fluorescence (MEF) is widely employed in high-sensitivity detection. In this work, the effect of pattern features of silver nanoparticle (SNP) arrays on MEF is investigated. It is shown that the intensity of MEF can be tuned by varying the SNP arrays. Strong MEF can be achieved by adjusting the pattern features.

    6. Gold nanoparticles

      Inhibition of HSV-1 Attachment, Entry, and Cell-to-Cell Spread by Functionalized Multivalent Gold Nanoparticles (pages 1044–1050)

      Dana Baram-Pinto, Sourabh Shukla, Aharon Gedanken and Ronit Sarid

      Article first published online: 14 APR 2010 | DOI: 10.1002/smll.200902384

      Thumbnail image of graphical abstract

      Gold nanoparticles capped with mercaptoethanesulfonate are shown to block HSV-1 infection by virtue of their ability to mimic cell surface heparan sulfate receptors, which are the primary binding site for the virus during the infection cycle. A mechanistic insight reveals efficient blockage of virus attachment, entry, and cell-to-cell spread by the nanoparticles.

    7. Microfluidics

      Formation of Bubbles in a Multisection Flow-Focusing Junction (pages 1051–1059)

      Michinao Hashimoto and George M. Whitesides

      Article first published online: 21 APR 2010 | DOI: 10.1002/smll.200902164

      Thumbnail image of graphical abstract

      The formation of bubbles in a flow-focusing (FF) junction comprising multiple rectangular sections is described. The investigation of the influence of the flow of liquid and of the geometry of the FF junction on the formation of bubbles identifies different mechanisms that lead to the generation of monodisperse, bidisperse, and tridisperse sets of bubbles reproducibly.

    8. Nanotechnology

      Digital and FM Demodulation of a Doubly Clamped Single-Walled Carbon-Nanotube Oscillator: Towards a Nanotube Cell Phone (pages 1060–1065)

      Vincent Gouttenoire, Thomas Barois, Sorin Perisanu, Jean-Louis Leclercq, Stephen T. Purcell, Pascal Vincent and Anthony Ayari

      Article first published online: 14 APR 2010 | DOI: 10.1002/smll.200901984

      Thumbnail image of graphical abstract

      Digital, FM, and AM demodulation is performed with a carbon-nanotube nanoelectromechanical resonator in a field-effect-transistor configuration. The DC voltage at the gate plays the role of a tuner. This device performs at a digital transfer rate of 10 kbt s−1, which is compatible with GSM requirements..

  6. Corrigendum

    1. Top of page
    2. Cover Picture
    3. Inside Cover
    4. Contents
    5. Communications
    6. Full Papers
    7. Corrigendum
    1. You have free access to this content
      Corrigendum: Three-Dimensional Fabrication at Small Size Scales

      T. G. Leong, A. M. Zarafshar and D. H. Gracias

      Article first published online: 11 MAY 2010 | DOI: 10.1002/smll.201090029

      This article corrects:

      Three-Dimensional Fabrication at Small Size Scales

      Vol. 6, Issue 7, 792–806, Article first published online: 26 MAR 2010

SEARCH

SEARCH BY CITATION