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Micromachines 2014, 5(4), 1296-1309; doi:10.3390/mi5041296

Laser Controlled Synthesis of Noble Metal Nanoparticle Arrays for Low Concentration Molecule Recognition

1
Dipartimento di Fisica e di Scienze della Terra, Università di Messina, v.le F. Stagno d'Alcontres 31, 98166 Messina, Italy
2
IPCF-CNR, Istituto per i Processi Chimico Fisici, Consiglio Nazionale delle Ricerche, v.le F. Stagno d'Alcontres 37, 98158 Messina, Italy
3
Dipartimento di Chimica, Materiali e Ingegneria Chimica, "G. Natta", Politecnico di Milano, P.zza L. da Vinci 32, 20133 Milano, Italy
4
Dipartimento di Energia & Center for Nano Engineered Materials and Surfaces-NEMAS, Politecnicodi Milano, via Ponzio 34-3, 20133 Milano, Italy
*
Author to whom correspondence should be addressed.
Received: 9 October 2014 / Revised: 18 November 2014 / Accepted: 24 November 2014 / Published: 1 December 2014
(This article belongs to the Special Issue Laser Micro- and Nano- Processing)
View Full-Text   |   Download PDF [1587 KB, uploaded 2 December 2014]   |  

Abstract

Nanostructured gold and silver thin films were grown by pulsed laser deposition.Performing the process in an ambient gas (Ar) leads to the nucleation and growth ofnanoparticles in the ablation plasma and their self-organization on the substrate. Thedependence of surface nanostructuring of the films on the deposition parameters is discussedconsidering in particular the number of laser pulses and the ambient gas nature and pressure.The performance of the deposited thin films as substrates for surface-enhanced Ramanspectroscopy (SERS) was tested against the detection of molecules at a low concentration.Taking Raman maps on micrometer-sized areas, the spatial homogeneity of the substrateswith respect to the SERS signal was tested. View Full-Text
Keywords: laser ablation of solids; morphology of thin films; optical properties of thin films; SERS laser ablation of solids; morphology of thin films; optical properties of thin films; SERS
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Fazio, E.; Neri, F.; Ponterio, R.C.; Trusso, S.; Tommasini, M.; Ossi, P.M. Laser Controlled Synthesis of Noble Metal Nanoparticle Arrays for Low Concentration Molecule Recognition. Micromachines 2014, 5, 1296-1309.

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