Citation: Lu Ya, Zhang Cong-Yun, Zhang Dong-Jie, Hao Rui, Hao Yao-Wu, Liu Ya-Qing. Fabrication of flower-like silver nanoparticles for surface-enhanced Raman scattering[J]. Chinese Chemical Letters, ;2016, 27(5): 689-692. doi: 10.1016/j.cclet.2016.01.032 shu

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

Lu Ya ^a,b ,
Zhang Cong-Yun ^a,b ,
Zhang Dong-Jie ^a,b ,
Hao Rui ^a,b ,
Hao Yao-Wu ^c,, ,
Liu Ya-Qing ^a,b,,

a.
School of Materials Science and Engineering, North University of China, Taiyuan 030051, China
b.
Shanxi Province Key Laboratory of Functional Nanocomposites, North University of China, Taiyuan 030051, China
c.
Department of Materials Science and Engineering, University of Texas at Arlington, Arlington, TX 76019, USA

Corresponding author: Hao Yao-Wu, yhao@uta.edu Liu Ya-Qing, zfflyq98@163.com
Received Date: 12 October 2015
Revised Date: 4 November 2015
Accepted Date: 19 January 2015
Available Online: 1 May 2016

Figures(4)

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 (R6G) 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 NaCl 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.
- Flower-like silver nanoparticles,
- Silver nanostructures,
- Crystal growth,
- Ultrasonic,
- Stirring
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