Dynamic Depolarized Light Scattering of Small Round Plasmonic Nanoparticles: When Imperfection is Only Perfect
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- 作者：Sandor Balog ; Laura Rodriguez-Lorenzo ; Christophe A. Monnier ; Benjamin Michen ; Marc Obiols-Rabasa ; Lucia Casal-Dujat ; Barbara Rothen-Rutishauser ; Alke Petri-Fink ; Peter Schurtenberger
- 刊名：Journal of Physical Chemistry C
- 出版年：2014
- 出版时间：August 7, 2014
- 年：2014
- 卷：118
- 期：31
- 页码：17968-17974
- 全文大小：487K
- ISSN：1932-7455
文摘
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.