Travis DeJournett, J. Spicer
Apr 23, 2014
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Influential Citations
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Journal
Journal of Physical Chemistry C
Abstract
A processing technique based on optical excitation of a polymer matrix nanocomposite containing a chemical precursor is presented to demonstrate the potential of this process for localized modification of nanoparticles in the bulk of the material. Femtosecond laser irradiation of a nanocomposite consisting of tungsten oxide nanoparticles in a fluoropolymer (tetrafluoroethylene-co-hexafluoropropylene) matrix resulted in decomposition of a silver precursor (vinyltriethylsilane(hexafluoroacetylacetonate)silver(I)). Transmission electron microscopy (TEM) results showed an increase in particle size as a result of photoprocessing with particles displaying core–shell type architectures. Optical absorption spectroscopy measurements indicated that silver was deposited in the bulk of the material and were consistent with absorption cross-section models for tungsten oxide core/silver shell nanoparticles. Estimates for silver shell volumes were found to correlate with the surface areas of the base tungsten oxide part...