Dynamic Depolarized Light Scattering of Small Round Plasmonic Nanoparticles: When Imperfection is Only Perfect

Although small round gold nanoparticles (Au NPs) possess only a small degree of shape anisotropy, they support localized surface plasmon resonances and exhibit intrinsic optical anisotropy. These inherent features promote depolarized light scattering, whose temporal fluctuations carry information ab...

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Bibliographic Details
Published inJournal of physical chemistry. C Vol. 118; no. 31; pp. 17968 - 17974
Main Authors Balog, Sandor, Rodriguez-Lorenzo, Laura, Monnier, Christophe A, Michen, Benjamin, Obiols-Rabasa, Marc, Casal-Dujat, Lucia, Rothen-Rutishauser, Barbara, Petri-Fink, Alke, Schurtenberger, Peter
Format Journal Article
LanguageEnglish
Published American Chemical Society 07.08.2014
Subjects
Chemical Sciences
Fysikalisk kemi
Kemi
Natural Sciences
Naturvetenskap
Physical Chemistry
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Summary:Although small round gold nanoparticles (Au NPs) possess only a small degree of shape anisotropy, they support localized surface plasmon resonances and exhibit intrinsic optical anisotropy. These inherent features promote depolarized light scattering, whose temporal fluctuations carry information about rotational Brownian dynamics, and thus can be used to describe the size distribution of round Au NPs. We demonstrate that this allows for a much more accurate determination of particle size and polydispersity through depolarized dynamic light scattering when compared to standard particle sizing with light scattering.
ISSN:1932-7447
1932-7455
DOI:10.1021/jp504264f