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Recently Published Articles

  1. Selective Breakdown of Metallic Pathways in Double-Walled Carbon Nanotube Networks

    Allen L. Ng, Yong Sun, Lyndsey Powell, Chuan-Fu Sun, Chien-Fu Chen, Cheng S. Lee and YuHuang Wang

    Article first published online: 2 SEP 2014 | DOI: 10.1002/smll.201402118

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    Removal of the metallic nanotubes from the semiconductors is an essential step to make use of double-walled carbon nanotubes for electronic applications. By electrical breakdown of the metallic pathways, high performance thin-film transistors with simultaneous high ON-state conductance and high ON/OFF ratios are achieved.

  2. Stochastic Particle Barcoding for Single-Cell Tracking and Multiparametric Analysis

    M. Castellarnau, G. L. Szeto, H.-W. Su, T. Tokatlian, J. C. Love, D. J. Irvine and J. Voldman

    Article first published online: 2 SEP 2014 | DOI: 10.1002/smll.201401369

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    A fluorescent particle-based method for sample identity tracking across assay platforms is developed. Beads are stochastically loaded with cells in a nanowell array, then photopolymerized within degradable hydrogels. Number, color, and 2D coordinates are used after image segmentation for barcode detection. The method is tested and optimized in silico for scalability. Recovery of DNA and RNA is demonstrated after enzymatic release.

  3. Gold Nanoparticle-Based Sensors Activated by External Radio Frequency Fields

    Paolo Della Vedova, Mirolyuba Ilieva, Vitaliy Zhurbenko, Ramona Mateiu, Adele Faralli, Martin Dufva and Ole Hansen

    Article first published online: 2 SEP 2014 | DOI: 10.1002/smll.201401187

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    Nanomachines of gold nanoparticles functionalized with fluorophore labeled DNA hairpins are activated using a radio frequency field (3 GHz) from a custom made coil. The radio frequency field causes a local heating of the gold nanoparticle and melts the hairpin stem section, which results in an increased fluorescence emission. Thus the nanomachines can be calibrated and reset in sensing applications.

  4. Preparation of Carbon-Coated NiCo2O4@SnO2 Hetero-nanostructures and Their Reversible Lithium Storage Properties

    Guoxin Gao, Hao Bin Wu, Shujiang Ding and Xiong Wen (David) Lou

    Article first published online: 2 SEP 2014 | DOI: 10.1002/smll.201400152

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    Carbon-coated NiCo2O4@SnO2 core–shell hetero-nanostructures are synthesized by a facile hydrothermal process and subsequent carbon nano-coating. When evaluated as anode materials for lithium-ion batteries, the 3D hetero-nanostructures exhibit enhanced lithium storage properties due to advantageous structural features.

  5. Contaminant Detection: Optical Reading of Contaminants in Aqueous Media Based on Gold Nanoparticles (Small 17/2014) (page 3426)

    Jianjun Du, Bowen Zhu, Xiaojun Peng and Xiaodong Chen

    Article first published online: 2 SEP 2014 | DOI: 10.1002/smll.201470101

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    Water pollution is a serious global issue for public health and environmental safety. To ensure safe water supply, a rapid, specific, low-cost, and robust platform is needed for monitoring contaminants in aqueous media. On page 3461, X. Peng, X. Chen, and co-workers summarize the recent efforts to design and apply gold nanoparticle-based optical assays, in the form of colorimetric, scattering, and fluorescence detection, for detecting contaminants in water with high performance.

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