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

Micromachines

Enza Fazio³  Fortunato Neri³  Rosina C. Ponterio¹  Sebastiano Trusso¹  Matteo Tommasini² 

[1] IPCF-CNR, Istituto per i Processi Chimico Fisici, Consiglio Nazionale delle Ricerche, v.le F. Stagno d’Alcontres 37, 98158 Messina, Italy; E-Mails:;Dipartimento di Chimica, Materiali e Ingegneria Chimica, “G. Natta”, Politecnico di Milano, P.zza L. da Vinci 32, 20133 Milano, Italy; E-Mail:;Dipartimento di Fisica e di Scienze della Terra, Università di Messina, v.le F. Stagno d’Alcontres 31, 98166 Messina, Italy; E-Mails:

关键词: laser ablation of solids;    morphology of thin films;    optical properties of thin films;    SERS;   

DOI  :  10.3390/mi5041296

来源: mdpi

【 摘 要 】

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 of nanoparticles in the ablation plasma and their self-organization on the substrate. The dependence of surface nanostructuring of the films on the deposition parameters is discussed considering 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 Raman spectroscopy (SERS) was tested against the detection of molecules at a low concentration. Taking Raman maps on micrometer-sized areas, the spatial homogeneity of the substrates with respect to the SERS signal was tested.

【 授权许可】

CC BY   
© 2014 by the authors; licensee MDPI, Basel, Switzerland