Silver Nano Islands Enhanced Raman Scattering on Large Area Grating Substrates Fabricated by Two Beam Laser Interference  

作　　者：ABID Muhammad Irfan WANG Lei ZHANG Xu-lin XU Ying 

机构地区：[1]State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun, 130012, P. R. China

出　　处：《Chemical Research in Chinese Universities》2013年第5期1006-1010,共5页高等学校化学研究（英文版）

基　　金：Supported by the National Natural Science Foundation of China（Nos.90923037, 61137001, 61008014, 60978048）.

摘　　要：The authors prepared large area surface-enhanced Raman scattering（SERS） active substrates with tunable enhancement. First the large area gratings were fabricated by scanning a photoresist with two-beam laser interference and subsequently they were coated with silver nano islands via vacuum evaporation. SERS active metal island grating substrates with four different periods（300, 400, 515 and 600 nm） and Ag nano islands uniformly coated on an area of 2.5 cm×0.5 cm were obtained. The measured SERS spectra reveal the tuning effect of the period on the Raman sig- nals period. The highest enhancement（ca. 105） for Rhodamine 6G（R6G） as probing molecule is associated with a pe- riod of 515 nm due to the perfect matching of surface plasmons and Raman excitation line. A good reproducibility of SERS signals with almost the same SERS intensity at different spots was observed on all the larger area Ag island grating substrates.The authors prepared large area surface-enhanced Raman scattering（SERS） active substrates with tunable enhancement. First the large area gratings were fabricated by scanning a photoresist with two-beam laser interference and subsequently they were coated with silver nano islands via vacuum evaporation. SERS active metal island grating substrates with four different periods（300, 400, 515 and 600 nm） and Ag nano islands uniformly coated on an area of 2.5 cm×0.5 cm were obtained. The measured SERS spectra reveal the tuning effect of the period on the Raman sig- nals period. The highest enhancement（ca. 105） for Rhodamine 6G（R6G） as probing molecule is associated with a pe- riod of 515 nm due to the perfect matching of surface plasmons and Raman excitation line. A good reproducibility of SERS signals with almost the same SERS intensity at different spots was observed on all the larger area Ag island grating substrates.

关 键 词：Ag nano island Surface-enhanced Raman scattering Large area grating Laser interference 

分 类 号：O657.37[理学—分析化学] TH744.3[理学—化学]