Surface-enhanced Raman scattering microchip fabricated by femtosecond laser.
We report a surface-enhanced Raman scattering (SERS) microchip that is capable of measuring SERS signals of liquid samples with high sensitivity. The microdevice is an integration of a silicon-based SERS substrate, a multimode optical fiber (MMF), and a microchannel embedded in the photosensitive glass fabricated by the femtosecond laser followed by thermal treatment, wet etching, and annealing. The performance of the SERS microchip is evaluated by measuring rhodamine 6G using a 632.8 nm He-Ne laser at 4.3 mW excitation power, which reveals that the detection limit is lower than 10(-10) M at a 1 s short accumulation time.
Lin
Cheng-Hsiang
CH
Department of Engineering Science, National Cheng Kung University, Tainan 70101, Taiwan.
Jiang
Lan
L
Xiao
Hai
H
Chen
Shean-Jen
SJ
Tsai
Hai-Lung
HL