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Surface-enhanced Raman spectroscopy of CdSe quantum dots on nanostructured plasmonic surfaces

Surface-enhanced Raman spectroscopy of CdSe quantum dots on nanostructured plasmonic surfaces
Surface-enhanced Raman spectroscopy of CdSe quantum dots on nanostructured plasmonic surfaces
Although quantum dots (QDs) are widely used as fluorophores they have not so far been used as Raman labels. Here we demonstrate (resonant) surface-enhanced Raman scattering (SERS) of CdSe QDs attached to nanostructured plasmonic surfaces. The 208?cm?1 CdSe longitudinal optical phonon mode is observed for laser excitation at 514, 633, and 785 nm. Tuning the SERS signal into resonance with the localized surface plasmon reveals the effects of optical absorption and emission on QD SERS. Equivalent tuning of the localized plasmons on graded nanovoid samples shows strong resonant SERS enhancements. These results pave the way for exploiting QDs as SERS markers.
0003-6951
141111-[3 pages]
Hugall, James T.
a8a3be44-b500-47bd-ad58-99cf374fb586
Baumberg, Jeremy J.
51423b5f-bdb8-4851-8d50-472253ceb12c
Mahajan, Sumeet
b131f40a-479e-4432-b662-19d60d4069e9
Hugall, James T.
a8a3be44-b500-47bd-ad58-99cf374fb586
Baumberg, Jeremy J.
51423b5f-bdb8-4851-8d50-472253ceb12c
Mahajan, Sumeet
b131f40a-479e-4432-b662-19d60d4069e9

Hugall, James T., Baumberg, Jeremy J. and Mahajan, Sumeet (2009) Surface-enhanced Raman spectroscopy of CdSe quantum dots on nanostructured plasmonic surfaces. Applied Physics Letters, 95 (14), 141111-[3 pages]. (doi:10.1063/1.3243982).

Record type: Article

Abstract

Although quantum dots (QDs) are widely used as fluorophores they have not so far been used as Raman labels. Here we demonstrate (resonant) surface-enhanced Raman scattering (SERS) of CdSe QDs attached to nanostructured plasmonic surfaces. The 208?cm?1 CdSe longitudinal optical phonon mode is observed for laser excitation at 514, 633, and 785 nm. Tuning the SERS signal into resonance with the localized surface plasmon reveals the effects of optical absorption and emission on QD SERS. Equivalent tuning of the localized plasmons on graded nanovoid samples shows strong resonant SERS enhancements. These results pave the way for exploiting QDs as SERS markers.

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More information

Published date: 2009
Additional Information: Times Cited: 6
Organisations: Organic Chemistry: Synthesis, Catalysis and Flow

Identifiers

Local EPrints ID: 342911
URI: http://eprints.soton.ac.uk/id/eprint/342911
ISSN: 0003-6951
PURE UUID: 0b394af1-3003-4253-8228-7cdc05e1e830
ORCID for Sumeet Mahajan: ORCID iD orcid.org/0000-0001-8923-6666

Catalogue record

Date deposited: 27 Sep 2012 15:03
Last modified: 09 Nov 2021 03:16

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Contributors

Author: James T. Hugall
Author: Jeremy J. Baumberg
Author: Sumeet Mahajan ORCID iD

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