Advanced Functional Materials

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Recently Published Articles

  1. Functionalized TiO2 Based Nanomaterials for Biomedical Applications

    Shuilin Wu, Zhengyang Weng, Xiangmei Liu, K.W. K. Yeung and Paul. K. Chu

    Article first published online: 9 JUL 2014 | DOI: 10.1002/adfm.201400706

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    TiO2 based nanomaterials with various structures have been widely used for a variety of biomedical applications ranging from tissue engineering to diseases diagnosis systems. Here, recent advances pertaining to nanostructured TiO2 in four important areas are reviewed, namely bone scaffolds, intravascular stents, drug delivery systems, and biosensors.

  2. Electronic Instabilities Leading to Electroformation of Binary Metal Oxide-based Resistive Switches

    Abhishek A. Sharma, Mohammad Noman, Mohamed Abdelmoula, Marek Skowronski and James A. Bain

    Article first published online: 9 JUL 2014 | DOI: 10.1002/adfm.201400461

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    Oxide-based resistive switching devices exhibit a characteristic electronic bistability and negative differential resistance leading to a reversible constriction of the current flow to a narrow filament prior to the permanent ‘forming’ event. Using a high-speed self-consistent thermometry, the local temperature and radius are tracked as the current conduction reversibly collapses from uniform regime to a sub-10 nm electronic filament.

  3. Photoluminescent Porous Si/SiO2 Core/Shell Nanoparticles Prepared by Borate Oxidation

    Jinmyoung Joo, Jose F. Cruz, Sanahan Vijayakumar, Joel Grondek and Michael J. Sailor

    Article first published online: 9 JUL 2014 | DOI: 10.1002/adfm.201400587

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    Systematic activation of photoluminescent porous silicon/silicon oxide core/shell nanoparticle provides a material with greater physiological stability and improved photoluminescence quantum yield (up to 23%). Borax treatment promotes surface oxidation of the porous silicon skeleton and consequently generates an electronically passivated Si-SiO2 interface.

  4. Elastomeric Tiles for the Fabrication of Inflatable Structures

    Stephen A. Morin, Sen Wai Kwok, Joshua Lessing, Jason Ting, Robert F. Shepherd, Adam A. Stokes and George M. Whitesides

    Article first published online: 9 JUL 2014 | DOI: 10.1002/adfm.201401339

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    3D structures fabricated from elastomeric tiles change shape when inflated or deflated. The pneumatic expansion or contraction of these structures is “programmed” by selecting tiles with different mechanical properties. Connecting these structures together provides a method to explore soft machines with 3D architectures. Structures including electrically conductive tiles increase the designs and functions possible in soft machines.

  5. Near-Infrared Light-Driven, Highly Efficient Bilayer Actuators Based on Polydopamine-Modified Reduced Graphene Oxide

    Mingyang Ji, Nan Jiang, Jian Chang and Junqi Sun

    Article first published online: 9 JUL 2014 | DOI: 10.1002/adfm.201401011

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    Near-infrared (NIR) light-driven bilayer actuators are fabricated by exploiting the photothermal conversion and humidity-sensitive properties of polydopamine-modified reduced graphene oxide. The bilayer actuator is capable of fast, highly efficient, and reversible bending/unbending motions toward periodic NIR light irradiation. The bilayer actuator is also utilized to build a NIR light-driven walking device capable of performing quick worm-like motion.