کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1482663 | 991573 | 2011 | 5 صفحه PDF | دانلود رایگان |
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 in amorphous matrix. Comparison is made with analysis of mesostructured silica sol gel films containing nanospheres. Polarization-dependent absorption spectra clearly evidence spheroid-shaped NP orientation and their mean aspect ratio is estimated from corresponding polar plots. Mean diameter of spherical NPs is deduced from low-frequency Raman scattering spectra as well as size of elongated spheroid NPs.
Research Highlights
► Polarized absorption for common orientation detection of NPs at macroscopic scale.
► Low-frequency Raman scattering of NPs: a complementary tool of polarized absorption.
► Shape and dimension estimation of spheroids by Raman and absorption measurements.
Journal: Journal of Non-Crystalline Solids - Volume 357, Issue 14, 1 July 2011, Pages 2615–2619