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  1. Distributed Feedback Lasers Based on MAPbBr3

    Neda Pourdavoud, André Mayer, Maximilian Buchmüller, Kai Brinkmann, Tobias Häger, Ting Hu, Ralf Heiderhoff, Ivan Shutsko, Patrick Görrn, Yiwang Chen, Hella-Christin Scheer and Thomas Riedl

    Version of Record online: 22 JAN 2018 | DOI: 10.1002/admt.201700253

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    Distributed feedback (DFB) lasers based on methylammonium lead bromide(MAPbBr3)thin films are reported. Thermal nanoimprinting is used to prepare linear Bragg gratings into the MAPbBr3 active layers. A very low lasing threshold of 3.4 µJ cm−2 is achieved, which is indicative of the outstanding material quality of the imprinted MAPbBr3 layer.

  2. Printing Conductive Micro-Web Structures via Capillary Transport of Elastomeric Ink for Highly Stretchable Strain Sensors

    Hyungdong Lee, Jaehyun Lee, Baekhoon Seong, Hyung-Seok Jang and Doyoung Byun

    Version of Record online: 18 JAN 2018 | DOI: 10.1002/admt.201700228

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    Capillary-transport-based printing dynamics is investigated using viscoelastic ink and PDMS to fabricate flexible and stretchable conductors. Microweb-shaped structures are spontaneously formed due to the low surface energy and flow of the viscous liquid. Unlike the conventional planar-shaped stretchable geometry, the microweb structures are more stable because the rounded edge area has advantages during the stretching/releasing cycles.

  3. Bluetooth Low Energy-Based Washable Wearable Activity Motion and Electrocardiogram Textronic Monitoring and Communicating System

    Xuyuan Tao, Tzu-Hao Huang, Chien-Lung Shen, Ya-Chi Ko, Gwo-Tsuen Jou and Vladan Koncar

    Version of Record online: 15 JAN 2018 | DOI: 10.1002/admt.201700309

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    A miniaturized, polydimethylsiloxane (PDMS) encapsulated, reliable, and fully washable system composed of textile electrodes and electronic module is designed, realized, and integrated to a sportswear. The vital physiological signs, skin temperature, and activity motions are transferred to a smart phone and then onto a remote data server to realize a continuous, web-based monitoring system.

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    Technological Advances on the Rise

    Esther Levy, Jovia Jiang and Jolke Perelaer

    Version of Record online: 12 JAN 2018 | DOI: 10.1002/admt.201700365

  5. Triboelectric Nanogenerator Tree for Harvesting Wind Energy and Illuminating in Subway Tunnel

    Yaoxing Bian, Tao Jiang, Tianxiao Xiao, Wenping Gong, Xia Cao, Zhaona Wang and Zhong Lin Wang

    Version of Record online: 10 JAN 2018 | DOI: 10.1002/admt.201700317

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    A bionic triboelectric nanogenerator tree composed of supercells with cell I of leaf and cell II of stem is designed for harvesting wind energy by utilizing the coupling effect of contact electrification and electrostatic induction. As a power source, a flexible device of a triboelectric nanogenerator tree is fabricated to present potential applications of illumination and advertisement in the long tunnel through harvesting the moving-generated wind energy.