Real-time, in-situ, extinction spectroscopy studies on silver-nanoseed formation

Tang, Bin, Xu, Shuping, Jian, Xiaoguang, Tao, Jinlong and Xu, Weiqing 2010, Real-time, in-situ, extinction spectroscopy studies on silver-nanoseed formation, Applied spectroscopy, vol. 64, no. 12, pp. 1407-1415.

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Title Real-time, in-situ, extinction spectroscopy studies on silver-nanoseed formation
Author(s) Tang, BinORCID iD for Tang, Bin
Xu, Shuping
Jian, Xiaoguang
Tao, Jinlong
Xu, Weiqing
Journal name Applied spectroscopy
Volume number 64
Issue number 12
Start page 1407
End page 1415
Total pages 8
Publisher Society for Applied Spectroscopy
Place of publication Baltimore, Md
Publication date 2010
ISSN 0003-7028
Keyword(s) extinction spectroscopy
silver nanoparticles
silver seeds
surface plasmon resonance
Summary In this paper, real-time extinction spectroscopy was employed to analyze in situ the fast formation process of silver seeds. The influencing factors for silver-seed formation, including the concentration of the reducer (NaBH 4), the amount of stabilizer (citrate), and the addition procedure of NaBH4, were evaluated. The configuration of the surface plasmon resonance (SPR) spectra of silver nanoparticles, which reflected the morphology of the produced silver seeds, was found to be distinctly affected by the NaBH4 concentration. Homogeneous silver nanoparticles were obtained when the added NaBH4 was lower in concentration than 2.00 mM. In contrast, higher concentrations of reducing agent (>3.00 mM NaBH4) resulted in uneven silver nanoparticles. Mie theory was applied to clarify the correlation of the SPR and the size of the silver seeds. Repeated additions of a small amount of the reducing agent could increase the monodispersity and isotropy of silver seeds. Real-time extinction spectroscopy is a convenient technique that achieves the in-situ and nondestructive measurement of intermediates in the formation process of silver nanoseeds.
Language eng
Field of Research 100712 Nanoscale Characterisation
Socio Economic Objective 970109 Expanding Knowledge in Engineering
HERDC Research category C3.1 Non-refereed articles in a professional journal
Copyright notice ©2010, Society for Applied Spectroscopy
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