表面增強拉曼散射技術之奈米雕刻金屬感測元件

Nano-Sculptured Metal Films as Surface Enhanced Raman Spectroscopy (SERS) Sensor

游竟維(Ching-Wei Yu) ； 王永祥(Yung-Hsiang Wang) ； 任貽均(Yi-Jun Jen)

《科儀新知》 197期 (2013/12) Pp. 14-22

摘要

本研究利用斜向角度沉積法搭配基板自我旋轉速率調控，製鍍具備各種直徑分布範圍的單層金屬奈米直柱，提供在可見光與紅外光波段下，具廣波域、高吸收及無偏極態相關光譜特性，而增強奈米結構的局部電場效應；此結構可做為表面增強拉曼光譜基板。利用此技術將實質增強農藥本身之拉曼散射訊號，可作為蔬果上農藥殘留之快速光學感測應用。

並列摘要

The SERS (surface enhanced Raman spectroscopy) sensing substrate comprising silver nanopillars was fabricated using glancing angle deposition (GLAD) together with self-rotation substrate. The SERS-active substrate owns broadband and high absorption spectra for unpolarized incident rays in the visible and infrared wavelength regimes. One of non-selective herbicide (paraquat, PQ) widely used for chemical weed control was successfully detected using SERS technique. The silver film was used as the SERS (surface-enhanced Raman scattering) substrate to enlarge the Raman signals of paraquat at the wavelength of 514 nm. This work demonstrates the feasibility of the rapid detection method for the indentation of pesticide residue.