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Spinning nanorods - active optical manipulation of semiconductor nanorods using polarised light

Spinning nanorods - active optical manipulation of semiconductor nanorods using polarised light
Spinning nanorods - active optical manipulation of semiconductor nanorods using polarised light
In this letter we show how a single beam optical trap offers the means for three-dimensional manipulation of semiconductor nanorods in solution. Furthermore rotation of the direction of the electric field provides control over the orientation of the nanorods, which is shown by polarisation analysis of two photon induced fluorescence. Statistics over tens of trapped agglomerates reveal a correlation between the measured degree of polarisation (DLP) and the size of the agglomerate which was determined by the escape frequency and the intensity of the emitted fluorescence. We estimate that we have trapped agglomerates with a volume of close to 10 times the volume of a single nanorod, which exhibited DLPs as high as 52%.
2040-3364
3693-3697
Head, C. Robin
a32d57ad-9449-4d10-9eb0-ce8c95a1c0e0
Kammann, Elena
75670efa-0611-41ef-ae6c-8e3da851c5dc
Zanella, Marco
64aad995-b8c7-401b-9c87-786d13b08837
Manna, Liberato
887c7089-35b3-4ba3-b7a5-ae62e7ae9d36
Lagoudakis, Pavlos G.
ea50c228-f006-4edf-8459-60015d961bbf
Head, C. Robin
a32d57ad-9449-4d10-9eb0-ce8c95a1c0e0
Kammann, Elena
75670efa-0611-41ef-ae6c-8e3da851c5dc
Zanella, Marco
64aad995-b8c7-401b-9c87-786d13b08837
Manna, Liberato
887c7089-35b3-4ba3-b7a5-ae62e7ae9d36
Lagoudakis, Pavlos G.
ea50c228-f006-4edf-8459-60015d961bbf

Head, C. Robin, Kammann, Elena, Zanella, Marco, Manna, Liberato and Lagoudakis, Pavlos G. (2012) Spinning nanorods - active optical manipulation of semiconductor nanorods using polarised light. Nanoscale, 4 (12), 3693-3697. (doi:10.1039/c2nr30515a).

Record type: Article

Abstract

In this letter we show how a single beam optical trap offers the means for three-dimensional manipulation of semiconductor nanorods in solution. Furthermore rotation of the direction of the electric field provides control over the orientation of the nanorods, which is shown by polarisation analysis of two photon induced fluorescence. Statistics over tens of trapped agglomerates reveal a correlation between the measured degree of polarisation (DLP) and the size of the agglomerate which was determined by the escape frequency and the intensity of the emitted fluorescence. We estimate that we have trapped agglomerates with a volume of close to 10 times the volume of a single nanorod, which exhibited DLPs as high as 52%.

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Published date: 2012

Identifiers

Local EPrints ID: 430544
URI: http://eprints.soton.ac.uk/id/eprint/430544
ISSN: 2040-3364
PURE UUID: 680b165d-412b-44b6-8257-868035d73441

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Date deposited: 03 May 2019 16:30
Last modified: 03 May 2019 16:30

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