Advanced Functional Materials

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  1. Redox-Stability of Alkoxy-BDT Copolymers and their Use for Organic Bioelectronic Devices

    Alexander Giovannitti, Karl J. Thorley, Christian B. Nielsen, Jun Li, Mary J. Donahue, George G. Malliaras, Jonathan Rivnay and Iain McCulloch

    Version of Record online: 21 FEB 2018 | DOI: 10.1002/adfm.201706325

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    The redox-stability of benzodithiophene copolymers is analyzed where it is found that copolymers with large ionization potentials (IPs) degrade during electrochemical oxidation in aqueous electrolytes while copolymers with a small IP can be charged reversibly. The degradation product is identified to be a quinone structure which has a significant impact on the performance of the copolymers in electronic devices.

  2. Highly Stable Plasmon Induced Hot Hole Transfer into Silicon via a SrTiO3 Passivation Interface

    Takayuki Matsui, Yi Li, Min-Hsiang Mark Hsu, Clement Merckling, Rupert F. Oulton, Lesley F. Cohen and Stefan A. Maier

    Version of Record online: 21 FEB 2018 | DOI: 10.1002/adfm.201705829

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    A boosted near-infrared photocurrent upon resonant plasmonic excitation is reported through ultrathin perovskite SrTiO3 protected silicon-based Schottky devices. The superior stability up to 100 V and low noise level of devices under reverse biases are investigated at a soft-breakdown induced low-resistive state, outperforming conventional plasmonic hot-carrier photodetector without interfacial engineering.

  3. Conducting Helical Structures from Celery Decorated with a Metallic Conjugated Polymer Give Resonances in the Terahertz Range

    Anders Elfwing, Carlito S. Ponseca Jr., Liangqi Ouyang, Andrzej Urbanowicz, Aru–nas Krotkus, Deyu Tu, Robert Forchheimer and Olle Inganäs

    Version of Record online: 21 FEB 2018 | DOI: 10.1002/adfm.201706595

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    Using a biotemplating procedure, a conducting coil is produced from a helical bundle of celery fibers coated with a conductive polymer. The coated structure shows resonance in the terahertz region.

  4. Ultrasensitive and Stable Au Dimer-Based Colorimetric Sensors Using the Dynamically Tunable Gap-Dependent Plasmonic Coupling Optical Properties

    Dilong Liu, Lingling Fang, Fei Zhou, Huilin Li, Tao Zhang, Cuncheng Li, Weiping Cai, Zhaoxiang Deng, Liangbin Li and Yue Li

    Version of Record online: 21 FEB 2018 | DOI: 10.1002/adfm.201707392

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    A novel Au dimer-based colorimetric sensor is developed by combining an Au dimer with a smart hydrogel. This colorimetric sensor utilizes the ultrasensitively gap-dependent properties of the plasmonic coupling peak shift of the Au dimers, and thus exhibits a high optical sensitivity, stability, and wide dynamic tuning sensitive range for different applications.

  5. Scalable and Highly Efficient Mesoporous Wood-Based Solar Steam Generation Device: Localized Heat, Rapid Water Transport

    Tian Li, He Liu, Xinpeng Zhao, Guang Chen, Jiaqi Dai, Glenn Pastel, Chao Jia, Chaoji Chen, Emily Hitz, Das Siddhartha, Ronggui Yang and Liangbing Hu

    Version of Record online: 21 FEB 2018 | DOI: 10.1002/adfm.201707134

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    A low-cost steam generation device is demonstrated with 80% conversion efficiency under 1 Sun. The heat transfer and fluidic transport directions are decouple, utilizing the mesostructure of wood. The anisotropic thermal conduction redirects the absorbed heat in-plane while impeding heat loss into bulk water. Nanoscale pits and spirals in crossplanes function as efficient water supply channels.