Preparation of Triangular Silver Nanoparticles Using Polyvinyl Pyrrolidone with Different Concentration

Kai Li; Rao Fu; Qing Ran Gao; Ai Wei Tang; Ying Feng Wang

doi:10.4028/www.scientific.net/AMR.873.206

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 873Preparation of Triangular Silver Nanoparticles...

Preparation of Triangular Silver Nanoparticles Using Polyvinyl Pyrrolidone with Different Concentration

Abstract:

This paper continues our previous work on preparation of triangular silver nanoparticles. The method proceeds with reaction of silver nitrate with hydrazine hydrate in the presence of polyvinyl pyrrolidone in aqueous solution. Effects of the concentration of PVP on the morphologies of Ag NPs were systematically investigated. The obtained Ag NPs were characterized by transmission electron microscopy and UV-visible spectrophotometer. The results showed that, triangular Ag NPs with edge lengths in the range of 50-200 nm were obtained using PVP as protective agent with lower concentration. As the concentration of PVP increased, spherical Ag NPs with their sizes about 6.2 nm were prepared and triangular Ag NPs were not obtained. The formation mechanism of triangular Ag NPs has been studied. Ostwald ripening is the driving force on the conversion of spherical Ag NPs to triangular Ag NPs in the presence of PVP.

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Periodical:

Advanced Materials Research (Volume 873)

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206-210

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https://doi.org/10.4028/www.scientific.net/AMR.873.206

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Online since:

December 2013

Authors:

Kai Li*, Rao Fu, Qing Ran Gao, Ai Wei Tang, Ying Feng Wang

Keywords:

Ostwald Ripening, PVP, Spherical Ag NPs, Triangular Silver Nanoparticles (Ag NPs)

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