Triggering gold nanoparticles formation on a quartz surface by nanosecond pulsed laser irradiation

MERCADAL, P. A.; SCHEJTMAN, S. D. GARCÍA; COMETTO, F. P.; VEGLIA, A. V.; CORONADO, E. A.

RSC Advances

Royal Society of Chemistry

Lugar: Cambridge; Año: 2021 vol. 11 p. 22419 - 22419

new direct and straightforward method is proposed to synthesize bare Au nanoparticles (Au NPs) ona quartz surface by nanosecond 532 nm pulsed laser irradiation of a quartz surface in contact with Au(III)precursor solution. The characterisation by XPS, UV-Vis, SEM and AFM measurements demonstrate theformation of bare Au NPs anchored on the quartz surface with a mean height of 27 10 nm localized inthe laser irradiation area. The main features of this approach are their simplicity, quick fabrication and thelarge surface area covered by Au NPs. The absence of ligands/stabilizing agents on the Au NPs makesthis substrate very suitable for its direct surface modification opening the range of applications inbiology, medicine, sensing, catalysis, among others. As a proof of concept, the capabilities andadvantages of this substrate as Surface Enhanced Raman Spectroscopy (SERS) platform were testeddemonstrating the absence of any Raman signal overlapping with the analyte in the whole spectral