Advanced Functional Materials
Copyright © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Materials Science Weekly Newsletter
Recently Published Articles
- 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
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.
- 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
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.
- 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
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.
- 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
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.
- 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
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.