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  1. Bio-Inspired Bright Structurally Colored Colloidal Amorphous Array Enhanced by Controlling Thickness and Black Background

    Masanori Iwata, Midori Teshima, Takahiro Seki, Shinya Yoshioka and Yukikazu Takeoka

    Version of Record online: 26 APR 2017 | DOI: 10.1002/adma.201605050

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    Inspired by Steller's jay, which displays angle-independent structural colors, angle-independent structurally colored materials that are composed of amorphous arrays of submicrometer-sized fine spherical silica colloidal particles are created by the layer-by-layer method on a black plate.

  2. Multi-Nonvolatile State Resistive Switching Arising from Ferroelectricity and Oxygen Vacancy Migration

    Weiming Lü, Changjian Li, Limei Zheng, Juanxiu Xiao, Weinan Lin, Qiang Li, Xiao Renshaw Wang, Zhen Huang, Shengwei Zeng, Kun Han, Wenxiong Zhou, Kaiyang Zeng, Jingsheng Chen, Ariando, Wenwu Cao and Thirumalai Venkatesan

    Version of Record online: 25 APR 2017 | DOI: 10.1002/adma.201606165

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    The coexistence of oxygen vacancy migration and the ferroelectric induced resistive switching in a BaTiO3 ferroelectric tunnel junctions through several sets of comparison between BaTiO3 and SrTiO3 based tunnel junctions is described. This coexistence results in two distinguishable loops with multi-nonvolatile resistive states in a single device, showing that controlling oxygen vacancies is an effective way to produce multistate memory devices.

  3. One-Step Solution Phase Growth of Transition Metal Dichalcogenide Thin Films Directly on Solid Substrates

    Anupam Giri, Heeseung Yang, Kalianan Thiyagarajan, Woosun Jang, Jae Min Myoung, Ranbir Singh, Aloysius Soon, Kilwon Cho and Unyong Jeong

    Version of Record online: 24 APR 2017 | DOI: 10.1002/adma.201700291

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    A generalized new strategy for solution phase growth of transition metal dichalcogenide thin films is presented. The microwave-assisted bottom-up synthesis approach enables the formation of MoS2, MoSe2, WS2, and WSe2 uniform thin films directly on solid substrates within 45–90 s. The MoS2-based thin film photodetector shows a high photoresponsivity over a broad spectral range and a quick photoresponse time.

  4. Cyclodextrin Films with Fast Solvent Transport and Shape-Selective Permeability

    Luis Francisco Villalobos, Tiefan Huang and Klaus-Viktor Peinemann

    Version of Record online: 24 APR 2017 | DOI: 10.1002/adma.201606641

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    A filtration membrane made of crosslinked cyclodextrins is reported. The channel-like cavities of cyclodextrins spawn numerous paths of defined aperture in the separation layer that can effectively discriminate between molecules. The transport of molecules through these membranes is highly shape-sensitive. In addition, the presence of hydrophobic (cavity) and hydrophilic (ester-crosslinked outer part) domains in these films results in high permeances for both polar and nonpolar solvents.

  5. Electrical Stress Influences the Efficiency of CH3NH3PbI3 Perovskite Light Emitting Devices

    Lianfeng Zhao, Jia Gao, YunHui L. Lin, Yao-Wen Yeh, Kyung Min Lee, Nan Yao, Yueh-Lin Loo and Barry P. Rand

    Version of Record online: 24 APR 2017 | DOI: 10.1002/adma.201605317

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    High-efficiency CH3NH3PbI3 perovskite light-emitting devices are demonstrated. The external quantum efficiency is boosted from 5.9% to 7.4% by subsequent electrical scans, which is related to excess ion motion reducing nonradiative decay channels, while overstressing the device will degrade device performance due to nonexcess ion migration.

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