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  1. Titanium Disulfide Coated Carbon Nanotube Hybrid Electrodes Enable High Energy Density Symmetric Pseudocapacitors

    Xining Zang, Caiwei Shen, Emmeline Kao, Roseanne Warren, Ruopeng Zhang, Kwok Siong Teh, Junwen Zhong, Minsong Wei, Buxuan Li, Yao Chu, Mohan Sanghadasa, Adam Schwartzberg and Liwei Lin

    Version of Record online: 11 DEC 2017 | DOI: 10.1002/adma.201704754

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    TiS2 is coated coaxially onto vertically aligned carbon nanotubes (VACNTs) via an atomic layer deposition sulfurization process, providing an exceptionally high capacitance of 195 F g-1 and working voltage window up to 3 V in an Li+ ion rich (21 m) electrolyte. The Energy density of a supercapacitor based on TiS2–VACNT electrodes is enhanced to 60.9 Wh kg-1, which outperforms many other pseudocapacitors.

  2. Theranostic 2D Tantalum Carbide (MXene)

    Han Lin, Youwei Wang, Shanshan Gao, Yu Chen and Jianlin Shi

    Version of Record online: 11 DEC 2017 | DOI: 10.1002/adma.201703284

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    A novel MXene-based nanotheranostic agent, Ta4C3 nanosheets, is successfully synthesized based on a two-step liquid exfoliation strategy of the MAX phase Ta4AlC3 by combined HF etching and probe sonication. By the strong X-ray attenuation capability and high near-infrared optical absorbance of Ta4C3-soybean phospholipid nanosheets, largely enhanced in vivo X-ray computed tomography and photoacoustic dual-mode imaging of tumors after intravenous administration are achieved.

  3. Critical Role of Interface and Crystallinity on the Performance and Photostability of Perovskite Solar Cell on Nickel Oxide

    Wanyi Nie, Hsinhan Tsai, Jean-Christophe Blancon, Fangze Liu, Costas C. Stoumpos, Boubacar Traore, Mikael Kepenekian, Olivier Durand, Claudine Katan, Sergei Tretiak, Jared Crochet, Pulickel M. Ajayan, MercouriG. Kanatzidis, Jacky Even and Aditya D. Mohite

    Version of Record online: 11 DEC 2017 | DOI: 10.1002/adma.201703879

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    Highly crystalline perovskite thin film can be grown on nickel oxide substrates evidenced by sharp X-ray diffraction pattern with characteristic tetragonal peak splitting observed only in single crystal. As a consequence, high efficiency photovoltaic cells can be achieved with extended operation lifetime under constant illumination benefit by the high degree of crystallinity.

  4. Selective Surface Enhanced Raman Scattering for Quantitative Detection of Lung Cancer Biomarkers in Superparticle@MOF Structure

    Xuezhi Qiao, Bensheng Su, Cong Liu, Qian Song, Dan Luo, Guang Mo and Tie Wang

    Version of Record online: 11 DEC 2017 | DOI: 10.1002/adma.201702275

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    A high-sensitivity surface enhanced Raman scattering (SERS) substrate is used for volatile organic compounds (VOCs) detection in exhaled breath, wherein ordered gold superparticles act as SERS hotspots and a metal organic framework layer is employed to slow the flow rate and strengthen the adsorption of gaseous analytes. Gaseous aldehydes VOCs are captured with a parts per billion limit of detection in a confounding analytes detection system.

  5. A Lithography-Free and Field-Programmable Photonic Metacanvas

    Kaichen Dong, Sukjoon Hong, Yang Deng, He Ma, Jiachen Li, Xi Wang, Junyeob Yeo, Letian Wang, Shuai Lou, Kyle B. Tom, Kai Liu, Zheng You, Yang Wei, Costas P. Grigoropoulos, Jie Yao and Junqiao Wu

    Version of Record online: 11 DEC 2017 | DOI: 10.1002/adma.201703878

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    An all-solid, rewritable metacanvas is demonstrated by exploiting the hysteretic phase transition of vanadium dioxide. On the metacanvas, nearly arbitrary metaphotonic devices can be rapidly and repeatedly written and erased. The writing is performed with a low-power laser below 90 °C. Dynamic manipulation of optical waves for light beam steering, polarization control, and holographic reconstruction is achieved with the metacanvas.

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