A SERS‐active microfluidic device with tunable surface plasmon resonances

• DOI: 10.1002/elps.201100309
• Publication Date: 2011-11-10T10:42:57Z
• Authors: Bin‐Bin Xu; Zhuo‐Chen Ma; Huan Wang; Xue‐Qing Liu; Yong‐Lai Zhang; Xu‐Lin Zhang; Ran Zhang; Hao‐Bo Jiang; Hong‐Bo Sun
• Keywords: Microchannel; Localized surface plasmon

Abstract A surface‐enhanced Raman scattering (SERS)‐active microfluidic device with tunable surface plasmon resonances is presented here. It constructed by silver grating substrates prepared two‐beam laser interference of photoresists and subsequent metal evaporation coating, as well PDMS microchannel derived from soft lithography. By varying the period gratings 200 to 550 nm, (SPRs) could be tuned in a certain range. When SPRs match excitation line, highest enhancement factor 2×10 7 achieved SERS detection. The SERS‐active exhibits both high reproducibility signals, thus holds great promise for applications on‐chip