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Spatial tracking of individual fluid dispersed particles via Raman spectroscopy.

Published version
Peer-reviewed

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Authors

Hogan, Benjamin Thomas 
O'Dowd, Jennifer 
Faneca Ruedas, Joaquin 
Baranov, Alexander 
Baldycheva, Anna 

Abstract

We demonstrate a method for the spatial tracking of individual particles, dispersed in a fluid host, via Raman spectroscopy. The effect of moving a particle upon the intensity of different bands within its Raman spectrum is first established computationally through a scattering matrix method. By comparing an experimental spectrum to the computational analysis, we show that the position of the particle can be obtained. We apply this method to the specific cases of molybdenum disulfide and graphene oxide particles, dispersed in a nematic liquid crystal, and contained within a microfluidic channel. By considering the ratio and difference between the intensities of the two Raman bands of molybdenum disulfide and graphene oxide, we demonstrate that an accurate position can be obtained in two dimensions.

Description

Keywords

51 Physical Sciences, 5104 Condensed Matter Physics

Journal Title

Sci Rep

Conference Name

Journal ISSN

2045-2322
2045-2322

Volume Title

10

Publisher

Springer Science and Business Media LLC
Sponsorship
Engineering and Physical Sciences Research Council (EP/N035569/1, EP/L015331/1, EP/N035569/1)
Ministry of Science and Higher Education of the Russian Federation (RFMEFI58718X0047)