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  1. Molecule Channels Directed by Cation-Decorated Graphene Oxide Nanosheets and Their Application as Membrane Reactors

    Yong Long, Kai Wang, Guolei Xiang, Kai Song, Gang Zhou and Xun Wang

    Version of Record online: 17 FEB 2017 | DOI: 10.1002/adma.201606093

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    Highly selective macromembranes, fabricated by cation-decorated graphene oxide, exhibit an excellent selectivity toward a wide range of solvents. Mixed solvents are successfully separated, based on which a membrane reactor is designed to promote a series of chemical reactions. The cations bonding to the graphene oxide nanosheets are found to be responsible for this selectivity by cation–π, electrostatic interactions, and hydrogen bonding.

  2. High-Q, Low-Threshold Monolithic Perovskite Thin-Film Vertical-Cavity Lasers

    Songtao Chen, Cheng Zhang, Joonhee Lee, Jung Han and Arto Nurmikko

    Version of Record online: 17 FEB 2017 | DOI: 10.1002/adma.201604781

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    A vertical-cavity surface-emitting perovskite laser is achieved using a microcavity configuration where CH3NH3PbI3 thin solid films are embedded within a custom GaN-based high-quality (Q-factor) resonator. This single-mode perovskite laser reaches a low threshold (≈7.6 µJ cm−2) at room temperature and emits spatially coherent Gaussian laser beams. The devices allow direct access to the study of perovskite gain dynamics and material robustness.

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    Molding Photonic Boxes into Fluorescent Emitters by Direct Laser Writing

    Christof P. Dietrich, Markus Karl, Jürgen Ohmer, Utz Fischer, Malte C. Gather and Sven Höfling

    Version of Record online: 16 FEB 2017 | DOI: 10.1002/adma.201605236

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    Direct laser writing of photonic boxes into active layers of biologically produced recombinant fluorescent protein in optical microcavities is demonstrated. Irradiation with laser light above the photobleaching threshold induces photonic confinement potentials on the order of 40 meV. The technique provides high spatial selectivity and enables room-temperature lasing in protein rings, and circular and elliptical pillars with customized beam shapes.

  4. Multichannel Polarization-Controllable Superpositions of Orbital Angular Momentum States

    Fuyong Yue, Dandan Wen, Chunmei Zhang, Brian D. Gerardot, Wei Wang, Shuang Zhang and Xianzhong Chen

    Version of Record online: 16 FEB 2017 | DOI: 10.1002/adma.201603838

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    This schematic shows a facile metasurface approach to realize polarization-controllable multichannel superpositions of orbital angular momentum (OAM) states with various topological charges. By manipulating the polarization state of the incident light, four kinds of superpositions of OAM states are realized using a single metasurface consisting of space-variant arrays of gold nanoantennas.

  5. Arrayed Van Der Waals Broadband Detectors for Dual-Band Detection

    Peng Wang, Shanshan Liu, Wenjin Luo, Hehai Fang, Fan Gong, Nan Guo, Zhi-Gang Chen, Jin Zou, Yan Huang, Xiaohao Zhou, Jianlu Wang, Xiaoshuang Chen, Wei Lu, Faxian Xiu and Weida Hu

    Version of Record online: 16 FEB 2017 | DOI: 10.1002/adma.201604439

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    An advanced visible/infrared dual-band photodetector with high-resolution imaging at room temperature is proposed and demonstrated for intelligent identification based on 2D GaSe/GaSb vertical heterostructure. It resolves the challenges of producing large-scale 2D growth, achieving fast response speed, outstanding detectivity, and lower manufacture cost, which are the main obstacles for industrialization of 2D-materials-based photodetection.

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