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Nanomaterials 2013, 3(1), 158-172; doi:10.3390/nano3010158
Article

Surface Enhanced Raman Scattering (SERS) Studies of Gold and Silver Nanoparticles Prepared by Laser Ablation

,
 and
*
ALERT-DHS Center of Excellence/Center for Chemical Sensors Development, University of Puerto Rico-Mayagüez, P.O. Box 9000, Mayaguez, PR 00681-9000, USA
* Author to whom correspondence should be addressed.
Received: 15 December 2012 / Revised: 1 February 2013 / Accepted: 7 February 2013 / Published: 1 March 2013
(This article belongs to the Special Issue New Developments in Nanomaterial Analysis)
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Abstract

Gold and silver nanoparticles (NPs) were prepared in water, acetonitrile and isopropanol by laser ablation methodologies. The average characteristic (longer) size of the NPs obtained ranged from 3 to 70 nm. 4-Aminobenzebethiol (4-ABT) was chosen as the surface enhanced Raman scattering (SERS) probe molecule to determine the optimum irradiation time and the pH of aqueous synthesis of the laser ablation-based synthesis of metallic NPs. The synthesized NPs were used to evaluate their capacity as substrates for developing more analytical applications based on SERS measurements. A highly energetic material, TNT, was used as the target compound in the SERS experiments. The Raman spectra were measured with a Raman microspectrometer. The results demonstrate that gold and silver NP substrates fabricated by the methods developed show promising results for SERS-based studies and could lead to the development of micro sensors.
Keywords: laser ablation; Au and Ag NP; Raman spectroscopy; SERS; explosives laser ablation; Au and Ag NP; Raman spectroscopy; SERS; explosives
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).
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Herrera, G.M.; Padilla, A.C.; Hernandez-Rivera, S.P. Surface Enhanced Raman Scattering (SERS) Studies of Gold and Silver Nanoparticles Prepared by Laser Ablation. Nanomaterials 2013, 3, 158-172.

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