Measurement of single nanoparticle anisotropy by laser induced optical alignment and Rayleigh scattering for determining particle morphology

Journal article (2022)

Authors

Markus Rademacher University College London
Jonathan Gosling University College London
Antonio Pontin University College London
Marko Toroš University of Glasgow
J.T. Mulder ChemE/Opto-electronic Materials - AS
A.J. Houtepen ChemE/Opto-electronic Materials - AS
P. F. Barker University College London
Research Group
ChemE/Opto-electronic Materials (AS) (TU Delft)
Copyright: © 2022 Markus Rademacher, Jonathan Gosling, Antonio Pontin, Marko Toroš, J.T. Mulder, A.J. Houtepen, P. F. Barker
DOI
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https://doi.org/10.1063/5.0128606
More Info
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Published Date

2022

Language

English

Faculty

Applied Sciences

Department

ChemE/Chemical Engineering

Research Group

ChemE/Opto-electronic Materials

Abstract

We demonstrate the measurement of nanoparticle anisotropy by angularly resolved Rayleigh scattering of single optical levitated particles that are oriented in space via the trapping light in vacuum. This technique is applied to a range of particle geometries from perfect spherical nanodroplets to octahedral nanocrystals. We show that this method can resolve shape differences down to a few nanometers and be applied in both low-damping environments, as demonstrated here, and in traditional overdamped fluids used in optical tweezers.