A5003314896- Conducting polymers and applications
- Advanced Sensor and Energy Harvesting Materials
- ZnO doping and properties
- Polymer Nanocomposite Synthesis and Irradiation
- Electrophoretic Deposition in Materials Science
- Gas Sensing Nanomaterials and Sensors
- Nanotechnology research and applications
- Organic Electronics and Photovoltaics
- Electrochemical sensors and biosensors
- Advanced Memory and Neural Computing
- Electrochemical Analysis and Applications
Samueli Institute
2011
University of California, Los Angeles
2006-2011
He'll weld with a mighty hand. Flash-welded polyaniline nanofiber actuators demonstrate unprecedented reversible, rapid actuation upon doping. An intense flash of light creates an asymmetric structure (see figure) thin dense layer on top thick porous nanofibrillar layer. On exposure to camphor sulfonic acid the film curls more than 720°.
A composite system comprised of polyaniline nanofibers bonded with gold nanoparticles is shown to possess a memory effect via charge transfer mechanism. The occurs between the imine nitrogen in and as confirmed by x-ray photoelectron spectroscopy Raman spectroscopy. This enables bistable electrical conductivity, allowing material be used digital device. further elimination conductance switching when fully reduced form polyaniline, leucoemeraldine, which possesses no nitrogens, place emeraldine form.
Controlling reaction temperature for a set time enables the size of gold nanoparticles autoreduced on surface polyaniline nanofibers to be controlled. The can used tune electrical bistable memory effect in gold/polyaniline nanofiber composite devices. Turn-on voltages and on/off ratios improve with decreasing nanoparticle size, making this promising method enhance performance create smaller Long-term stability composites improved by addition stabilizers following autoreduction nanoparticles.
Zinc oxide (ZnO) nanoparticles functionalized with a bi-functional coupling agent methacryloxypropyl-trimethoxysilane (MPS) were used to fabricate vinyl-ester resin polymeric nanocomposite, which shows an improved interfacial interaction between the particle and matrix. As result, in comparison unmodified particle-filled nanocomposites, composites possessed higher resistance thermal degradation, demonstrated UV shielding enhanced photoluminescent properties. The more uniform dispersion,...