Orientation of spheroid-shaped silver nanoparticles in mesostructured silica films studied by polarized absorption and low-frequency Raman spectroscopy
作者： D. Vouagner , L. Bois , E. Nardou , S. Sirotkin , B. Champagnon
DOI: 10.1016/J.JNONCRYSOL.2011.03.011
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摘要: Abstract Orientation of spheroid-shaped silver (Ag) nanoparticles (NPs) embedded in mesostructured silica sol gel films is studied by polarized absorption measurements and low-frequency Raman scattering, two complementary techniques well-adapted to characterize nanostructures amorphous matrix. Comparison made with analysis containing nanospheres. Polarization-dependent spectra clearly evidence NP orientation their mean aspect ratio estimated from corresponding polar plots. Mean diameter spherical NPs deduced scattering as well size elongated spheroid NPs.
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