Advanced Functional Materials

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  1. Evidence that Crystal Facet Orientation Dictates Oxygen Evolution Intermediates on Rutile Manganese Oxide

    Hirotaka Kakizaki, Hideshi Ooka, Toru Hayashi, Akira Yamaguchi, Nadège Bonnet-Mercier, Kazuhito Hashimoto and Ryuhei Nakamura

    Version of Record online: 16 FEB 2018 | DOI: 10.1002/adfm.201706319

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    The oxygen evolution activity of MnO2 with different facet orientations is studied to gain insight into the role of Mn3+ and allow for the rational design of functional analogs of the biological oxygen evolution center. (101) surfaces display higher activity compared to (110) surfaces despite having the same bulk crystal structure, due to the increased stabilization of Mn3+ on (101).

  2. Tuning the Electronic and Photonic Properties of Monolayer MoS2 via In Situ Rhenium Substitutional Doping

    Kehao Zhang, Brian M. Bersch, Jaydeep Joshi, Rafik Addou, Christopher R. Cormier, Chenxi Zhang, Ke Xu, Natalie C. Briggs, Ke Wang, Shruti Subramanian, Kyeongjae Cho, Susan Fullerton-Shirey, Robert M. Wallace, Patrick M. Vora and Joshua A. Robinson

    Version of Record online: 16 FEB 2018 | DOI: 10.1002/adfm.201706950

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    This work demonstrates in situ rhenium (Re) doping of synthetic monolayer MoS2 with ≈1 at% Re on r-plane sapphire. Electronic measurements elucidate that 1 at% Re doping achieves nearly degenerate n-type doping, which agrees with density functional theory calculations. Low-temperature photoluminescence measurements reveal suppression of defect emission induced by Re doping, resulting from the passivation of defects due to the presence of Re.

  3. Highly In-Plane Optical and Electrical Anisotropy of 2D Germanium Arsenide

    Shengxue Yang, Yanhan Yang, Minghui Wu, Chunguang Hu, Wanfu Shen, Yongji Gong, Li Huang, Chengbao Jiang, Yongzhe Zhang and Pulickel M. Ajayan

    Version of Record online: 16 FEB 2018 | DOI: 10.1002/adfm.201707379

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    Here the in-plane anisotropic optical and electrical properties of low-symmetry 2D layered GeAs are reported by combining the polarized Raman spectra, azimuth-dependent reflectance difference microscopy, and angle-resolved electrical transport measurements with related theoretical calculations.

  4. A General Metal-Organic Framework (MOF)-Derived Selenidation Strategy for In Situ Carbon-Encapsulated Metal Selenides as High-Rate Anodes for Na-Ion Batteries

    Xijun Xu, Jun Liu, Jiangwen Liu, Liuzhang Ouyang, Renzong Hu, Hui Wang, Lichun Yang and Min Zhu

    Version of Record online: 16 FEB 2018 | DOI: 10.1002/adfm.201707573

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    Carbon-encapsulated metal selenide electrodes with multiscale, multidimensional, and hierarchical architectures are successfully designed and synthesized via a general and facile metal-organic framework derived selenidation strategy. Due to the novel and unique architecture design, these nanohybrid electrodes display ultrastable cycling performance as well as excellent rate capability for Na-ion batteries.

  5. Fast, Self-Driven, Air-Stable, and Broadband Photodetector Based on Vertically Aligned PtSe2/GaAs Heterojunction

    Long-Hui Zeng, Sheng-Huang Lin, Zhong-Jun Li, Zhi-Xiang Zhang, Teng-Fei Zhang, Chao Xie, Chun-Hin Mak, Yang Chai, Shu Ping Lau, Lin-Bao Luo and Yuen Hong Tsang

    Version of Record online: 16 FEB 2018 | DOI: 10.1002/adfm.201705970

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    This work shows the large-area growth of high-quality vertically aligned PtSe2, and its application to photodetectors based on PtSe2-GaAs heterojunctions which exhibit a broadband sensitivity to illumination ranging from deep ultraviolet to near-infrared light, with a peak sensitivity in the region from 650 to 810 nm. The high-performance broadband photodetector will develop the next-generation 2D Group-10 materials based optoelectronic devices.

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