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Recently Published Articles

  1. Transparent Nanofibrous Mesh Self-Assembled from Molecular LEGOs for High Efficiency Air Filtration with New Functionalities

    Varun Kumar Singh, Sai Kishore Ravi, Wanxin Sun and Swee Ching Tan

    Version of Record online: 2 DEC 2016 | DOI: 10.1002/smll.201601924

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    A new air-filter design is demonstrated with different functionalities at different dimensional scale employing a bottom-up approach akin to assembling Lego bricks. An organic molecule employed as a starting-block self-organizes to nanoparticles and fibers resulting in a nanofibrous mesh which exhibited a high filtration-efficiency and quality-factor in addition to the scope of potential mosquito screening and shielding ultraviolet rays.

  2. Enhancement of Upconverted Fluorescence by Interference Layers

    Janina Wirth, Kory K. Green, Megan O'Connor and Shuang F. Lim

    Version of Record online: 2 DEC 2016 | DOI: 10.1002/smll.201602846

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    Anew approach of enhanced upconversion luminescence by the interference modulation of the infrared excitation and visible emission wavelengths of single particles is presented. By the positioning of NaYF4 nanocrystals codoped with Yb3+/Er3+ ions above a reflecting gold surface at controlled distances enhancements of up to 45 times at a wavelength of 650 nm can be achieved.

  3. A Series Circuit of Thermal Rectifiers: An Effective Way to Enhance Rectification Ratio

    Shiqian Hu, Meng An, Nuo Yang and Baowen Li

    Version of Record online: 1 DEC 2016 | DOI: 10.1002/smll.201602726

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    A novel approachis proposed to enhance the thermal rectification ratio, namely, arranging two thermal rectifiers in series. Through theoretical analysis and molecular dynamics simulations on graphene/phononic crystal structures, the results show that the series thermal rectifiers enhance thermal rectification ratio significantly, compared to a single rectifier. Meanwhile, the results of theoretical prediction match well with simulation results.

  4. Integration of Photothermal Effect and Heat Insulation to Efficiently Reduce Reaction Temperature of CO2 Hydrogenation

    Wenbo Zhang, Liangbing Wang, Kaiwen Wang, Munir Ullah Khan, Menglin Wang, Hongliang Li and Jie Zeng

    Version of Record online: 30 NOV 2016 | DOI: 10.1002/smll.201602583

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    The photothermal effect is applied in CO2 hydrogenation to reduce the reaction temperature under illumination by encapsulating Pt nanocubes and Au nanocages into a zeolitic imidazolate framework (ZIF-8). Under illumination, the heat generated by the photothermal effect of Au nanocages is mainly insulated in the ZIF-8 to form a localized high-temperature region, thereby improving the catalytic activity of Pt nanocubes.

  5. A High-Performance Lithium-Ion Capacitor Based on 2D Nanosheet Materials

    Shaohui Li, Jingwei Chen, Mengqi Cui, Guofa Cai, Jiangxin Wang, Peng Cui, Xuefei Gong and Pooi See Lee

    Version of Record online: 28 NOV 2016 | DOI: 10.1002/smll.201602893

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    A high-performance lithium-ion capacitor is fabricated using well-defined ZnMn2O4-graphene hybrid nanosheets anode and N-doped carbon nanosheets cathode. Owing to the large surface areas of 2D nanostructures for ion transport and storage with shortened ion diffusion length, the full device exhibits both excellent energy and power density.