One-step fabrication of nanostructures by femtosecond laser for surface-enhanced Raman scattering

Cheng Hsiang Lin*, Lan Jiang, Yen Hsin Chai, Hai Xiao, Shean-Jen Chen, Hai Lung Tsai

*Corresponding author for this work

Research output: Contribution to journalArticle

45 Scopus citations

Abstract

This paper reports an efficient fabrication of nanostructures on silicon substrates for surface-enhanced Raman scattering (SERS). Silicon wafer substrates in the aqueous solution of silver nitrate were machined by the femtosecond laser direct writing to achieve simultaneously in one-step the generation of grating-like nanostructures on the surface of the substrate and the formation of silver nanoparticles on the surface of the nanostructures via the laser-induced photoreduction effect. Parametric studies were conducted for the different concentrations of aqueous silver nitrate solutions and scanning speeds. The enhancement factor of the SERS is found to be higher than 10 9. The patterning technique provides an opportunity to incorporate the SERS capability in a functional microchip.

Original languageEnglish
Pages (from-to)21581-21589
Number of pages9
JournalOptics Express
Volume17
Issue number24
DOIs
StatePublished - 23 Nov 2009

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