Spatial tracking of individual fluid dispersed particles via Raman spectroscopy
|Author:||Hogan, Benjamin Thomas1,2,3; O’Dowd, Jennifer1,4; Ruedas, Joaquin Faneca1,2;|
1Department of Engineering, University of Exeter, Exeter, UK
2EPSRC Centre for Doctoral Training in Metamaterials, University of Exeter, Exeter, UK
3Department of Information Technology and Electrical Engineering, University of Oulu, Oulu, Finland
4Department of Engineering, University of Cambridge, Cambridge, UK
5Faculty of Photonics and Optoinformatics, ITMO University, Saint Petersburg 197101, Russia
|Online Access:||PDF Full Text (PDF, 1.4 MB)|
|Persistent link:|| http://urn.fi/urn:nbn:fi-fe2020112592923
|Publish Date:|| 2020-11-25
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.
|Type of Publication:||
A1 Journal article – refereed
|Field of Science:||
213 Electronic, automation and communications engineering, electronics
The Engineering and Physical Sciences Research Council (EPSRC) of the United Kingdom via Grant No. EP/N035569/1, and also the EPSRC Centre for Doctoral Training in Electromagnetic Metamaterials (Grant No. EP/L015331/1). The Federal Target Program of the Ministry of Science and Higher Education of the Russian Federation (No. 14.587.21.0047, ID RFMEFI58718X0047).
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