title: Laser-treated substrate with nanoparticles for surface-enhanced Raman scattering.
abstract: A rapid and simple approach to fabricate a large area of nanostructured substrate for surface-enhanced Raman scattering (SERS) is reported. Gold nanoparticles ranging from 10 to 40 nm in diameter uniformly distributed on a silicon substrate were obtained by annealing the gold film precoated on the silicon substrate with UV nanosecond (ns) laser pulses. The gold nanoparticles were formed by surface tension of the melted gold layer heated by ns laser pulses. The enhancement factor of the SERS substrate for Rhodamine 6G at 632.8 nm excitation was measured to be higher than 10(5). The proposed technique provides the opportunity to equip a functional microchip with SERS capability of high sensitivity and chemical stability.
authors.affiliation: Department of Engineering Science, National Cheng Kung University, Tainan 70101, Taiwan.
authors.forename: Cheng-Hsiang
authors.initials: CH
authors.lastname: Lin
authors.forename: Lan
authors.initials: L
authors.lastname: Jiang
authors.forename: Jun
authors.initials: J
authors.lastname: Zhou
authors.forename: Hai
authors.initials: H
authors.lastname: Xiao
authors.forename: Shean-Jen
authors.initials: SJ
authors.lastname: Chen
authors.forename: Hai-Lung
authors.initials: HL
authors.lastname: Tsai