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  1. A Papertronic, On-Demand and Disposable Biobattery: Saliva-Activated Electricity Generation from Lyophilized Exoelectrogens Preinoculated on Paper

    Maedeh Mohammadifar and Seokheun Choi

    Version of Record online: 20 JUL 2017 | DOI: 10.1002/admt.201700127

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    A portable, on-demand micropower source is demonstrated by building paper-based microbial fuel cells with inactive, lyophilized exoelectrogenic cells. Exoelectrogenic bacteria preinoculated in the paper battery is freeze-dried for long-term storage and can be readily rehydrated by saliva for on-demand power generation. An oxygen-tight interface and engineered conductive paper reservoir achieve significant performance boosts from maximized microbial electron transfer efficiency.

  2. 3D Printing Macroscale Engineered Materials Using Ultrasound Directed Self-Assembly and Stereolithography

    John Greenhall and Bart Raeymaekers

    Version of Record online: 19 JUL 2017 | DOI: 10.1002/admt.201700122

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    A manufacturing process for 3D printing engineered materials with user-specified microstructure is demonstrated. The engineered materials are 3D printed layer-by-layer using stereolithography, where each layer contains a user-specified pattern of nano- or microparticles organized via ultrasound directed self-assembly. Such materials can display unique physical properties based on the pattern of particles comprising the microstructure.

  3. 3D Printed Masks and Transfer Stamping Process to Enable the Fabrication of the Hemispherical Organic Photodiodes

    Hyunsoo Kim, Joosung Moon, Kyusang Lee and Jerzy Kanicki

    Version of Record online: 18 JUL 2017 | DOI: 10.1002/admt.201700090

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    A novel method to fabricate organic photodiode passive arrays on a hemispherical substrate with field of view = 120° is demonstrated. 3D shadow mask by sterolithgraphy and 3D polydimethylsiloxane stamp for transfer printing on curved substrate are used to realize the hemispherical organic photodiode. These techniques allow direct patterning of the device electrodes without an excessive strain caused by substrate deformation process.

  4. Acoustic Magnifying Lens for Far-Field High Resolution Imaging Based on Transformation Acoustics

    Gang Yong Song, Wei Xiang Jiang, Qiang Cheng, Li Ting Wu, Hui Yuan Dong and Tie Jun Cui

    Version of Record online: 18 JUL 2017 | DOI: 10.1002/admt.201700089

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    An acoustic magnifying lens is proposed based on transformation acoustics and effective medium theory, which is employed to realize far field sub-wavelength resolution imaging over broad bandwidth. The high-resolution imaging effect is demonstrated both numerically and experimentally, showing advantages as compact size, and low reflection at the interface that are especially favorable in acoustic engineering.

  5. Batch Fabrication of Customizable Silicone-Textile Composite Capacitive Strain Sensors for Human Motion Tracking

    Asli Atalay, Vanessa Sanchez, Ozgur Atalay, Daniel M. Vogt, Florian Haufe, Robert J. Wood and Conor J. Walsh

    Version of Record online: 12 JUL 2017 | DOI: 10.1002/admt.201700136

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    The design and batch manufacturing of a stretchable textile-silicone capacitive sensor is presented. A large sensor mat is created using a scalable, rapid, and reliable batch manufacturing process and laser cutting enables the creation of arbitrary, customizable individual sensors. Compliant and robust connections are created by fusing filaments of coaxial cables to the conductive fabric electrode with thermoplastic film.

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