Small

Cover image for Vol. 7 Issue 9

May 9, 2011

Volume 7, Issue 9

Pages 1141–1270

  1. Cover Picture

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Concept
    6. Frontispiece
    7. Communications
    8. Full Papers
    1. Single-Particle Tracking: Single-Particle Tracking of Hepatitis B Virus-like Vesicle Entry into Cells (Small 9/2011) (page 1141)

      Xian Hao, Xin Shang, Jiazhen Wu, Yuping Shan, Mingjun Cai, Junguang Jiang, Zhong Huang, Zhiyong Tang and Hongda Wang

      Article first published online: 28 APR 2011 | DOI: 10.1002/smll.201190028

      Thumbnail image of graphical abstract

      The cover image shows the visualization of the entry of a Hepatitis B virus-like vesicle (HBsAg) into a cell. HBsAg (shown as red particles) is used as a model to study the infection mechanisms and dynamics of the single-enveloped virus in living cells by real-time fluorescence microscopy. HBsAg is found to enter cells via a caveolin-mediated endocytic pathway (caveolin: yellow). By tracking individual HBsAg particles in living cells, the anomalously actin-dependent but not microtubule-dependent motility of internalized HBsAg particles is revealed (actin: green). The motility of HBsAg particles in living cells was also analyzed quantitatively. The results may potentially settle the long-term debate of whether hepatitis B viruses directly break the plasma membrane barrier or rely on endocytosis to infect the cell. For more information, please read the Full Paper “Single-Particle Tracking of Hepatitis B Virus-like Vesicle Entry into Cells” by Z. Huang, Z. Tang, H. Wang, and co-workers, beginning on page 1212.

  2. Inside Front Cover

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Concept
    6. Frontispiece
    7. Communications
    8. Full Papers
    1. Magnetochromatic Microspheres: Real-Time Optofluidic Synthesis of Magnetochromatic Microspheres for Reversible Structural Color Patterning (Small 9/2011) (page 1142)

      Junhoi Kim, Younghoon Song, Le He, Hyoki Kim, Howon Lee, Wook Park, Yadong Yin and Sunghoon Kwon

      Article first published online: 28 APR 2011 | DOI: 10.1002/smll.201190029

      Thumbnail image of graphical abstract

      The cover picture shows a microfluidic channel and the magnetochromatic microspheres it generates. From a single-synthesis environment, structural-colored microspheres are synthesized by combining an optofluidic approach with a magnetic property tuning method. The main image features the dynamic color tuning capability of the method; differently colored microspheres are generated in a single microfluidic channel, and color can be changed in real-time during the synthesis process. The microspheres are produced with controlled and heterogeneous optical properties. They comprise 1D chain arrangements of magnetic nanoparticles, as shown by the microsphere in the foreground. The magnetic nanoparticles enable the microspheres to have the unique structural color. Orientation-dependent color diffraction of the magnetochromatic microspheres can be utilized to form structural color patterns using a patterned magnet. For more information, please read the Communication “Real-Time Optofluidic Synthesis of Magnetochromatic Microspheres for Reversible Structural Color Patterning” by S. Kwon and co-workers, beginning on page 1163.

  3. Contents

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Concept
    6. Frontispiece
    7. Communications
    8. Full Papers
    1. Contents: (Small 9/2011) (pages 1143–1148)

      Article first published online: 28 APR 2011 | DOI: 10.1002/smll.201190030

  4. Concept

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Concept
    6. Frontispiece
    7. Communications
    8. Full Papers
    1. Recent Progress in Nano-biotechnology: Compartmentalized Micro- and Nanoparticles via Electrohydrodynamic Co-jetting (pages 1149–1156)

      Joerg Lahann

      Article first published online: 8 APR 2011 | DOI: 10.1002/smll.201002002

      Thumbnail image of graphical abstract

      Multicompartmental particles and fibers made by electrohydrodynamic co-jetting offer independent design of surface microstructure, internal architecture, shape, and size.

  5. Frontispiece

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Concept
    6. Frontispiece
    7. Communications
    8. Full Papers
    1. Multistrata Nanoparticles: The Multistrata Nanoparticle: an FeOx/Au Core/Shell Enveloped in a Silica–Au Shell (Small 9/2011) (page 1157)

      Charleson S. Bell, Shann S. Yu and Todd D. Giorgio

      Article first published online: 28 APR 2011 | DOI: 10.1002/smll.201190031

      Thumbnail image of graphical abstract

      The frontispiece features the multistrata nanoparticle—a single-core, five-layered nanostructure. It combines tunable, dual-peak, UV–vis–NIR spectrum extinction characteristics; trimodal imaging contrast; a simple synthesis; and facile surface modification capabilities into a single <60-nm-diameter, multifunctional nanosphere that seeks to relieve current methodological limitations by coupling diagnostics and therapeutics into one single theranostic tool. The image shows a model of the interior, multilayered, metallodielectric structure, including a schematic of the fabrication protocol. For more information, please read the Communication “The Multistrata Nanoparticle: An FeOx/Au Core/Shell Enveloped in a Silica–Au Shell” by T. D. Giorgio and co-workers, beginning on page 1157.

  6. Communications

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Concept
    6. Frontispiece
    7. Communications
    8. Full Papers
    1. The Multistrata Nanoparticle: an FeOx/Au Core/Shell Enveloped in a Silica–Au Shell (pages 1158–1162)

      Charleson S. Bell, Shann S. Yu and Todd D. Giorgio

      Article first published online: 24 MAR 2011 | DOI: 10.1002/smll.201002100

      Thumbnail image of graphical abstract

      The multistrata nanoparticle is the culmination of tunable, dual-peak, UV–vis–NIR spectrum extinction characteristics, trimodal imaging contrast, simple synthesis, and facile surface modification capabilities into a single <60 nm diameter, novel, multifunctional, multilayered nanosphere that seeks to relieve current methodological limitations by coupling diagnostics and therapeutics into one single theranostic tool.

    2. Real-Time Optofluidic Synthesis of Magnetochromatic Microspheres for Reversible Structural Color Patterning (pages 1163–1168)

      Junhoi Kim, Younghoon Song, Le He, Hyoki Kim, Howon Lee, Wook Park, Yadong Yin and Sunghoon Kwon

      Article first published online: 29 MAR 2011 | DOI: 10.1002/smll.201001822

      Thumbnail image of graphical abstract

      Dynamic synthesis of magnetoresponsive structural-colored microspheres is demonstrated by combining an optofluidic approach with a magnetic property tuning method. The strategy allows for the synthesis of magnetochromatic microspheres with controlled and heterogeneous optical properties in a single synthesis environment. Orientation-dependent color diffraction of the magnetochromatic microspheres is utilized to form structural color patterns using a patterned magnet.

    3. Irreversible and Reversible Structural Deformation and Electromechanical Behavior of Carbon Nanohorns Probed by Conductive AFM (pages 1169–1174)

      Jianxun Xu, Yoshitaka Shingaya, Hiroyuki Tomimoto, Osamu Kubo and Tomonobu Nakayama

      Article first published online: 23 MAR 2011 | DOI: 10.1002/smll.201002148

      Thumbnail image of graphical abstract

      The electrical and electromechanical properties of individual carbon nanohorn (CNH) aggregates are probed using a conductive atomic force microscope. The results showed that an individual CNH aggregate exhibits irreversible conductance responses at the initial stage of applying pressure, ascribed to the plastic deformation of the peripheral nanohorns, and reversible conductance responses afterwards, corresponding to the elastic deformation of the core.

    4. Effect of Nitrophenyl Functionalization on the Magnetic Properties of Epitaxial Graphene (pages 1175–1180)

      Jeongmin Hong, Sandip Niyogi, Elena Bekyarova, Mikhail E. Itkis, Palanisamy Ramesh, Nissim Amos, Dmitri Litvinov, Claire Berger, Walt A. de Heer, Sakhrat Khizroev and Robert C. Haddon

      Article first published online: 1 APR 2011 | DOI: 10.1002/smll.201002244

      Thumbnail image of graphical abstract

      Nitrophenyl functionalization of epitaxial graphene leads to the development of magnetic order as a result of the presence of disordered antiferromagnetic, ferromagnetic (ferrimagnetic), and superparamagnetic regions which are observable in magnetization, magnetoresistance, and microscopy measurements.

    5. Stretchable Field-Effect-Transistor Array of Suspended SnO2 Nanowires (pages 1181–1185)

      Gunchul Shin, Chang Hoon Yoon, Min Young Bae, Yoon Chul Kim, Sahng Ki Hong, John A. Rogers and Jeong Sook Ha

      Article first published online: 14 APR 2011 | DOI: 10.1002/smll.201100116

      Thumbnail image of graphical abstract

      Stretchable device systems with suspended SnO2 nanowires (NWs) as channel materials: Oxygen plasma is used to remove the underlying polymer to float the NWs. These suspended NW field-effect transistors exhibit high electrical performance. By adopting a neutral mechanical plane and curved interconnection, electrical performance of the suspended NW field-effect transistors is maintained under stretching up to approximately 40%.

    6. Contact Doping and Ultrathin Gate Dielectrics for Nanoscale Organic Thin-Film Transistors (pages 1186–1191)

      Frederik Ante, Daniel Kälblein, Ute Zschieschang, Tobias W. Canzler, Ansgar Werner, Kazuo Takimiya, Masaaki Ikeda, Tsuyoshi Sekitani, Takao Someya and Hagen Klauk

      Article first published online: 15 APR 2011 | DOI: 10.1002/smll.201002254

      Thumbnail image of graphical abstract

      To suppress undesirable short-channel effects in organic transistors with nanoscale lateral dimensions, aggressive gate-dielectric scaling (using an ultra-thin monolayer-based gate dielectric) and area-selective contact doping (using a strong organic dopant) are introduced into organic transistors with channel lengths and gate-to-contact overlaps of about 100 nm. These nanoscale organic transistors have off-state drain currents below 1 pA, on/off current ratios near 107, and clean linear and saturation characteristics.

    7. pH-Triggered SERS via Modulated Plasmonic Coupling in Individual Bimetallic Nanocobs (pages 1192–1198)

      Maneesh K. Gupta, Sehoon Chang, Srikanth Singamaneni, Lawrence F. Drummy, Ray Gunawidjaja, Rajesh R. Naik and Vladimir V. Tsukruk

      Article first published online: 14 APR 2011 | DOI: 10.1002/smll.201002169

      Thumbnail image of graphical abstract

      Silver nanowires functionalized with gold nanoparticles using a polyacrylic acid linker exhibit pH-modulated optical properties, including a shift in localized surface plasmon resonance, and triggered surface-enhanced Raman scattering (SERS) effects. The tunable optical properties are exhibited as a result of changes in particle coupling caused by the swelling response of polyacrylic acid.

    8. Graphene Oxide as a Carbon Source for Controlled Growth of Carbon Nanowires (pages 1199–1202)

      Xiehong Cao, Qiyuan He, Wenhui Shi, Bing Li, Zhiyuan Zeng, Yumeng Shi, Qingyu Yan and Hua Zhang

      Article first published online: 24 MAR 2011 | DOI: 10.1002/smll.201100071

      Thumbnail image of graphical abstract

      A simple methodfor the controlled growth of novel reduced graphene oxide/carbon nanowire (rGO/CNW) composites is developed. Without any additional carbon precursor, the graphene oxide itself serves as the only carbon source. As a proof-of-concept, the chemical sensor based on the parallel rGO/CNW micropatterns is demonstrated, which exhibits the excellent detection of dopamine.

    9. Direct Electrodeposition of Graphene Enabling the One-Step Synthesis of Graphene–Metal Nanocomposite Films (pages 1203–1206)

      Chengbin Liu, Ke Wang, Shenglian Luo, Yanhong Tang and Liuyun Chen

      Article first published online: 8 APR 2011 | DOI: 10.1002/smll.201002340

      Thumbnail image of graphical abstract

      A graphene–Au nanocomposite is prepared by a one-step electrodeposition technique directly from a dispersion containing graphene oxide (GO) and HAuCl4. The electrodeposited graphene and Au particles are assembled into layered nanostructures. The coelectrodeposition technique can be extended to the fabrication of various graphene-based composites.

    10. Delamination of Layered Covalent Organic Frameworks (pages 1207–1211)

      Isadora Berlanga, Maria Luisa Ruiz-González, José María González-Calbet, Jose Luis G. Fierro, Rubén Mas-Ballesté and Félix Zamora

      Article first published online: 14 APR 2011 | DOI: 10.1002/smll.201002264

      Thumbnail image of graphical abstract

      The isolation of nanostructures consisting of 10–25 layers of a covalent organic framework is confirmed by AFM carried out on several surfaces. This is achieved by means of selective ultrasound exfoliation on the bulk layered material. TEM demonstrates the porous nature of the free-standing layers on a carbon gird. The chemical composition of this novel 2D polymer is determined by infrared, X-ray photoelectron, and electron-energy-loss spectroscopy.

  7. Full Papers

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Concept
    6. Frontispiece
    7. Communications
    8. Full Papers
    1. Single-Particle Tracking of Hepatitis B Virus-like Vesicle Entry into Cells (pages 1212–1218)

      Xian Hao, Xin Shang, Jiazhen Wu, Yuping Shan, Mingjun Cai, Junguang Jiang, Zhong Huang, Zhiyong Tang and Hongda Wang

      Article first published online: 24 MAR 2011 | DOI: 10.1002/smll.201002020

      Thumbnail image of graphical abstract

      The surface antigen of the hepatitis B virus (HBsAg) is used as a model to study the infection mechanisms and dynamics of a single enveloped virus in living cells by single-particle imaging and tracking. The results indicate that cells internalize HBsAg via a caveolin-mediated endocytic pathway and actin-dependent intracellular motility.

    2. Target Binding Influences Permeability in Aptamer–Polyelectrolyte Microcapsules (pages 1219–1226)

      Yasir Sultan and Maria C. DeRosa

      Article first published online: 12 APR 2011 | DOI: 10.1002/smll.201001829

      Thumbnail image of graphical abstract

      Smart aptamer microcapsules are prepared by embedding aptamer sequences within the walls of multilayered polyelectrolyte films deposited onto a sacrificial spherical core. These microcapsules can bind to the aptamer’s target mole­cule and display a greater permeability for the target as compared to control microcapsules made from random DNA sequences.

    3. Covalently Linking Poly(lactic-co-glycolic acid) Nanoparticles to Microbubbles Before Intravenous Injection Improves their Ultrasound-Targeted Delivery to Skeletal Muscle (pages 1227–1235)

      Caitlin W. Burke, Yu-Han J. Hsiang, Eben Alexander IV, Alexander L. Kilbanov and Richard J. Price

      Article first published online: 1 APR 2011 | DOI: 10.1002/smll.201001934

      Thumbnail image of graphical abstract

      Composite drug-delivery agents comprising 150 nm poly(lactide-co-glycolide) nanoparticles adhered to 2–4 μm dia­meter albumin-shelled microbubbles are used to improve nanoparticle delivery to ultrasound-targeted skeletal muscle.

    4. Molecular Recognition Force Spectroscopy: A New Tool to Tailor Targeted Nanoparticles (pages 1236–1241)

      Hugo Oliveira, Martina Rangl, Andreas Ebner, Barbara Mayer, Peter Hinterdorfer and Ana P. Pêgo

      Article first published online: 29 MAR 2011 | DOI: 10.1002/smll.201002074

      Thumbnail image of graphical abstract

      A novel screening tool is described to optimize the density of targeting moieties of functionalized nanoparticles towards attaining cell-specific interaction. The unbinding event probability between nanoparticles tethered to an atomic force microscopy tip and neuronal cells is directly correlated to the nanoparticle gene-vectoring capacity.

    5. Chemical Reaction Between Ag Nanoparticles and TCNQ Microparticles in Aqueous Solution (pages 1242–1246)

      Jinchong Xiao, Zongyou Yin, Yuechao Wu, Jun Guo, Yuhua Cheng, Hong Li, Yizhong Huang, Qing Zhang, Jan Ma, Freddy Boey, Hua Zhang and Qichun Zhang

      Article first published online: 15 APR 2011 | DOI: 10.1002/smll.201001411

      Thumbnail image of graphical abstract

      The chemical reactionbetween Ag nano­particles (Ag NPs) and 7,7′,8,8′-tetracycanoquinodimethane (TCNQ) microparticles (MPs) in aqueous solution to form Ag-NP-decorated Ag–TCNQ nanowires is reported. The reaction between Ag NPs and TCNQ MPs indicate three stages: the aggregation of NPs and MPs, diffusion and reaction between NPs and MPs, and formation of Ag–TCNQ nanowires. The as-synthesized semiconducting nanowires show good performance in nonvolatile memory devices with multiple write-read-erase-read (WRER) cycles at room temperature in air.

    6. Growth and Stability of ZnTe Magic-Size Nanocrystals (pages 1247–1256)

      Esther Groeneveld, Susanne van Berkum, Andries Meijerink and Celso de Mello Donegá

      Article first published online: 8 APR 2011 | DOI: 10.1002/smll.201002316

      Thumbnail image of graphical abstract

      ZnTe magic-sized clusters (MSCs) are investigated. The stability and growth kinetics of the MSCs are strongly influenced by the reaction temperature, precursor concentration, and nature of the ligands used as the coordinating solvent. Under optimum synthetic conditions the method presented here allows the synthesis and isolation of a single MSC family.

    7. Carbene-Functionalized Single-Walled Carbon Nanotubes and Their Electrical Properties (pages 1257–1263)

      Chao Liu, Qing Zhang, Francesco Stellacci, Nicola Marzari, Lianxi Zheng and Zhaoyao Zhan

      Article first published online: 12 APR 2011 | DOI: 10.1002/smll.201002307

      Thumbnail image of graphical abstract

      Dichlorocarbene groups covalently attach onto the sidewalls of isolated semiconducting single-walled carbon nanotubes (s-SWCNTs), metallic SWCNTs (m-SWNTs), and network SWCNTs. A reversible s- to m-SWCNT transition is observed by both Raman scattering and electrical measurements. The electrical properties of m-SWCNTs remain largely unaffected, whereas the on-state conductivity of s-SWCNTs is greatly reduced by this process, in agreement with theoretical predictions.

    8. Organic Molecules Reconstruct Nanostructures on Ionic Surfaces (pages 1264–1270)

      Thomas Trevethan, Bartosz Such, Thilo Glatzel, Shigeki Kawai, Alexander L. Shluger, Ernst Meyer, Paula de Mendoza and Antonio M. Echavarren

      Article first published online: 12 APR 2011 | DOI: 10.1002/smll.201001910

      Thumbnail image of graphical abstract

      Monolayer islands and pits patterned on a KBr (001) surface are restructured through the adsorption of functionalized truxene molecules. Polar groups on the molecules induce structural changes in the surface, lowering the relative free energy of the rounded structures.

SEARCH

SEARCH BY CITATION