Fabrication of flower-like silver nanoparticles for surface-enhanced Raman scattering

作     者：Ya Lu Cong-Yun Zhang Dong-Jie Zhang Rui Hao Yao-Wu Hao Ya-Qing Liu 

作者机构：School of Materials Science and Engineering North University of China Shanxi Province Key Laboratory of Functional Nanocomposites North University of China Department of Materials Science and Engineering University of Texas at Arlington 

出 版 物：《Chinese Chemical Letters》 (中国化学快报（英文版）)

年 卷 期：2016年第27卷第5期

页      面：689-692页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070302[理学-分析化学] 0703[理学-化学] 070301[理学-无机化学] 

基　　金：financial support for this work from the Natural Science Foundation for Young Scientists of Shanxi Province of China (No. 2015021078) International Cooperation of Science and Technology Project in Shanxi Province of China (No. 2014081006-2) 

主　　题：Flower like silver nanoparticles Silver nanostructures Crystal growth Ultrasonic Stirring 

摘      要：The flower-like silver nanoparticles have been synthesized by reducing silver nitrate （AgNO3） with ascorbic acid （AA） as the reductant and polyvinyl pyrrolidone （PVP） as the capping agent under vigorous stirring. Such flower-like nanoparticles are aggregates of small nanoplates and nanorods. They were tested as substrates for the surface-enhanced Raman scattering （SERS）, showing high sensitivity for detecting Rhodamine 6G （RBG） at a concentration as low as 10 7 mol/L. It has been found that replacing mechanical stirring with ultrasound sonication would drastically change the particle morphology, from flower-like nanoparticles to well-dispersed smaller nanoparticles. Furthermore, when trace amounts of NaC1 were added into the reagents, well-dispersed Ag nanoparticles formed even in vigorous stirring. These phenomena can be explained with the diffusion and reactant supply during nucleation and growth of Ag nanoparticles.