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In-situ fabrication of gold nanoparticle functionalized probes for tip-enhanced Raman spectroscopy by dielectrophoresis

Sweetenham, Claire Sue; Woolley, Richard; Notingher, Ioan

Authors

Claire Sue Sweetenham

Richard Woolley



Abstract

We report the use of dielectrophoresis to fabricate in-situ probes for tip-enhanced Raman spectroscopy (TERS) based on Au nanoparticles. A typical conductive atomic force microscope (AFM) was used to functionalize iridium-coated conductive silicon probes with Au nanoparticles of 10-nm diameter. Suitable TERS probes can be rapidly produced (30 to 120 s) by applying a voltage of 10 Vpp at a frequency of 1 MHz. The technique has the advantage that the Au-based probes are ready for immediate use for TERS measurements, minimizing the risks of tip contamination and damage during handling. Scanning electron microscopy and energy dispersive x-ray spectroscopy were used to confirm the quality of the probes, and used samples of p-ATP monolayers on silver substrates were used to demonstrate experimentally TERS measurements.

Citation

Sweetenham, C. S., Woolley, R., & Notingher, I. (2016). In-situ fabrication of gold nanoparticle functionalized probes for tip-enhanced Raman spectroscopy by dielectrophoresis. Journal of Nanophotonics, 10(3), 1-7. https://doi.org/10.1117/1.JNP.10.030502

Journal Article Type Article
Acceptance Date Jul 25, 2016
Publication Date Aug 18, 2016
Deposit Date Sep 1, 2016
Publicly Available Date Sep 1, 2016
Journal Journal of Nanophotonics
Electronic ISSN 1934-2608
Publisher Society of Photo-optical Instrumentation Engineers
Peer Reviewed Peer Reviewed
Volume 10
Issue 3
Article Number 030502
Pages 1-7
DOI https://doi.org/10.1117/1.JNP.10.030502
Keywords tip-enhanced Raman spectroscopy; dielectrophoresis; gold nanoparticles
Public URL https://nottingham-repository.worktribe.com/output/805243
Publisher URL http://nanophotonics.spiedigitallibrary.org/article.aspx?articleid=2546056

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Copyright Statement
Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by/4.0





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