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  1. Underwater Mechanically Robust Oil-Repellent Materials: Combining Conflicting Properties Using a Heterostructure

    Xiangfu Meng, Miaomiao Wang, Liping Heng and Lei Jiang

    Version of Record online: 19 JAN 2018 | DOI: 10.1002/adma.201706634

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    Layered heterostructure polyacrylic acid (PAA)/polyvinylidene fluoride–graphene nanosheet composites with a convex hexagonal columnar structure on the surface are prepared. The outer hydrophilic PAA hydrogel coating prevents underwater oil adhesion to the material. The inner hydrophobic layer microstructure endows the material with excellent mechanical properties even after immersion in seawater and at different pH values for 1 month.

  2. Novel MOF-Derived Co@N-C Bifunctional Catalysts for Highly Efficient Zn–Air Batteries and Water Splitting

    Mingdao Zhang, Quanbin Dai, Hegen Zheng, Mindong Chen and Liming Dai

    Version of Record online: 19 JAN 2018 | DOI: 10.1002/adma.201705431

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    A Co@N-C material, derived from new chiral metal–organic frameworks, exhibits excellent bifunctional electrocatalytic activities toward both oxygen reduction and oxygen evolution reactions, along with remarkable performance for primary/rechargeable Zn–air batteries (powering water-splitting systems), outperforming their counterparts based on Pt/C and Pt/C + RuO2, respectively.

  3. Efficient, Hysteresis-Free, and Stable Perovskite Solar Cells with ZnO as Electron-Transport Layer: Effect of Surface Passivation

    Jing Cao, Binghui Wu, Ruihao Chen, Youyunqi Wu, Yong Hui, Bing-Wei Mao and Nanfeng Zheng

    Version of Record online: 19 JAN 2018 | DOI: 10.1002/adma.201705596

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    Surface passivation of ZnO by a thin layer of MgO and protonated ethanolamine readily makes ZnO a very promising electron-transporting material for creating efficient, hysteresis-free and stable perovskite solar cells (PSCs). PSCs, stable in air for more than 300 h, are achieved when graphene is used to encapsulate the cells.

  4. Piezotronic Tuning of Potential Barriers in ZnO Bicrystals

    Peter Keil, Maximilian Trapp, Nikola Novak, Till Frömling, Hans-Joachim Kleebe and Jürgen Rödel

    Version of Record online: 19 JAN 2018 | DOI: 10.1002/adma.201705573

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    An epitaxial solid-state transformation process is applied to create individual ZnO–ZnO interfaces with tailored defect chemistry and polarization vector alignment. The potential barrier height at the interfaces is increased or decreased by stress-induced piezoelectric charges, depending on the orientation of the polarization vectors. A reduction of the barrier height by 86% demonstrates the high applicability for piezotronic applications.

  5. VO2/TiN Plasmonic Thermochromic Smart Coatings for Room-Temperature Applications

    Qi Hao, Wan Li, Huiyan Xu, Jiawei Wang, Yin Yin, Huaiyu Wang, Libo Ma, Fei Ma, Xuchuan Jiang, Oliver G. Schmidt and Paul K. Chu

    Version of Record online: 19 JAN 2018 | DOI: 10.1002/adma.201705421

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    Thermochromic vanadium oxide (VO2) film is coated on titanium nitrate (TiN) plasmonic nanoparticles to fabricate a hybrid VO2/TiN smart coating. This novel coating can intelligently control the infrared (IR) radiation under room-temperature conditions by reflecting the IR radiation at a high temperature while allowing most of the radiation to go through at a low temperature.