Preparation of Triangular Silver Nanoparticles Using Polyvinyl pyrrolidone with Different Concentration
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.
Triangular silver nanoparticles (Ag NPs) Spherical Ag NPs PVP Ostwald ripening
Kai Li Rao Fu Qing-ran Gao Ai-wei Tang Ying-feng Wang
Department of Chemistry, Capital Normal University, Beijing, 100048, China Department of Chemistry, Capital Normal University, Beijing, 100048, China; Faculty of Chemistry, No Department of Chemistry, Beijing Jiaotong University, Beijing, 100044, China
国际会议
The Eighth China National Conference on Functional Materials and Applications(第八届中国功能材料及其应用学术会议)
哈尔滨
英文
206-210
2013-08-23（万方平台首次上网日期，不代表论文的发表时间）