作者： Kuibao Zhanga, c, , , Tixian Zengb, Xiulan Tanc, Weidong Wuc, Yongjian Tangc, Haibin Zhangd

a State Key Laboratory C*tion Base for Nonmetal Composites and Functional Materials, Southwest University of Science and Technology, Mianyang 621010, China

b College of Physics and Electronic Information, China West Normal University, Nanchong 637009, China

c Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, China

d Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang 621900, China

 

摘要：In this study, Au nanoparticle (5 nm) colloid was employed for a facile preparation of SERS substrates from three approaches: (1) original Au nanoparticles, (b) Au colloid coated 200 nm polystyrene (PS) beads, and (3) Au colloid annealed at 200–500 °C. Rhodamine 6G (R6G) and crystal violet were employed as the Raman active probes. The Au colloid deposited PS beads (PS@Au) exhibit intensive SERS signal for R6G detection, which is promising for crystal violet detection after being annealed at 400 °C. The 200 °C annealed Au nanoparticles demonstrate excellent combined SERS sensitivity for both R6G and crystal violet. For the original Au colloid, elevated annealing temperature from 200 °C to 500 °C decreases the SERS intensity as Au particles were coarsened gradually.

 

關鍵詞：SERS; Au nanoparticles; Deposition; R6G; Crystal violet