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  1. Hierarchically Arranged Helical Fiber Actuators Derived from Commercial Cloth

    Jiang Gong, Huijuan Lin, John W. C. Dunlop and Jiayin Yuan

    Version of Record online: 20 FEB 2017 | DOI: 10.1002/adma.201605103

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    The first hygroscopic tunable cloth actuator is realized via modification of a commercial cloth template by a 3D nanoporous polymer hybrid. The nanoporous hybrid guarantees fast water diffusion and amplifies deformation. The cloth actuator achieves a large-scale size production, tunable motion, high tensile strength, and mechanical flexibility with a breadth of utilities (e.g., electric generator and “smart” materials).

  2. Ultrasensitive 2D ZnO Piezotronic Transistor Array for High Resolution Tactile Imaging

    Shuhai Liu, Longfei Wang, Xiaolong Feng, Zheng Wang, Qi Xu, Suo Bai, Yong Qin and Zhong Lin Wang

    Version of Record online: 20 FEB 2017 | DOI: 10.1002/adma.201606346

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    A new kind of 2D ZnO nanoplatelets based piezotronic transistors (2DPT) array is demonstrated, which exhibits an unprecedented pressure sensitivity of 60.97–78.23 meV MPa−1 and a fast response time of less than 5 ms. The 2DPT array based on self-assembly of well aligned ZnO nanoplatelets shows a high resolution of 12 700 dpi and can achieve adaptive high-resolution strain mapping.

  3. Novel Bimorphological Anisotropic Bulk Nanocomposite Materials with High Energy Products

    Xiaohong Li, Li Lou, Wenpeng Song, Guangwei Huang, Fuchen Hou, Qian Zhang, Hai-Tian Zhang, Jianwei Xiao, Bin Wen and Xiangyi Zhang

    Version of Record online: 20 FEB 2017 | DOI: 10.1002/adma.201606430

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    The fabrication of novel bimorphological anisotropic SmCo7/Fe(Co) bulk nanostructures with a multistep deformation approach is demonstrated. The structures exhibit a record-high energy product (28 MGOe) for this class of bulk materials with less rare-earth elements. The resulting nanocomposite outperforms, for the first time, corresponding pure rare-earth permanent magnet (SmCo7) with 58% enhancement in energy product.

  4. Exceptionally High Ionic Conductivity in Na3P0.62As0.38S4 with Improved Moisture Stability for Solid-State Sodium-Ion Batteries

    Zhaoxin Yu, Shun-Li Shang, Joo-Hwan Seo, Daiwei Wang, Xiangyi Luo, Qingquan Huang, Shuru Chen, Jun Lu, Xiaolin Li, Zi-Kui Liu and Donghai Wang

    Version of Record online: 20 FEB 2017 | DOI: 10.1002/adma.201605561

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    A Na-ion solid-state electrolyte, Na3P0.62As0.38S4, is developed with an exceptionally high conductivity of 1.46 mS cm–1 at 25 °C and enhanced moisture stability. Dual effects of alloying element As (lattice expansion and a weaker As[BOND]S bond strength) are responsible for the superior conductivity. Improved moisture stability is regulated by shifting low energy moisture reactions to high energy ones due to As.

  5. A New Class of Lasing Materials: Intrinsic Stimulated Emission from Nonlinear Optically Active Metal–Organic Frameworks

    Raghavender Medishetty, Venkatram Nalla, Lydia Nemec, Sebastian Henke, David Mayer, Handong Sun, Karsten Reuter and Roland A. Fischer

    Version of Record online: 20 FEB 2017 | DOI: 10.1002/adma.201605637

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    Blue-color stimulated emission with low threshold power is observed from In- and Zn-MOFs, which feature a highly fluorescent chromophore densely packed and rigidly linked to the metal-ion centers in the solid state. The density-of-states and transition dipole moments are calculated and the stimulated emission phenomenon is correlated with these properties.