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Preparation of Single-Crystal Ag Nanoprisms and Nanocubes by Photoinduced Conversion
Liu Hengquan,Yao Suwei,Song Renfeng,Tang Jianjun,Zhang Weiguo,Wang Hongzhi,Li Rongxian
Author NameAffiliationE-mail
Liu Hengquan Sugiyama Laboratory of Surface Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072; Research Institute of Tsinghua in Shenzhen, Shenzhen 518057  
Yao Suwei Sugiyama Laboratory of Surface Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072 gongzl@public.tpt.tj.cn 
Song Renfeng Institute of Anshan Mining Company, Anshan Iron and Steel Group Corporation, Anshan 114001  
Tang Jianjun Research Institute of Tsinghua in Shenzhen, Shenzhen 518057  
Zhang Weiguo Sugiyama Laboratory of Surface Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072  
Wang Hongzhi Sugiyama Laboratory of Surface Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072  
Li Rongxian Research Institute of Tsinghua in Shenzhen, Shenzhen 518057  
Abstract:
The preparation of Ag nanoparticles with the non-spherical shape has been conducted from aqueous solution by photo induced conversion. Ag nanoprisms (80~120nm) and nanocube s(90~200nm) were respectively obtained in the presence of trisodiumcitrate (TSC) orpolyvinylpirrolidon (PVP). These Ag nanoparticles were single-crystals. The results showed that Ag nanoprisms had apreferential growth direction along the Ag(111) axis and Ag nanocubes had a preferential growth direction along the Ag(100) axis. By means of characterization with TEM, ED and UV-V is Spectra, the fundamental analyses and discussion about the changing causes of nanoparticles shape from spherical tonon-spherical have been carried out in the photo induced process.
Key words:  Photo induced conversion, Nanoprism, Nanocube, Single-crystal
FundProject:
光诱导转化法制备单晶Ag纳米三棱体和立方体
刘恒权,姚素薇*,宋仁峰,唐建军,张卫国,王宏智,李荣先
摘要:
分别以柠檬酸三钠(TSC)及N-聚乙烯吡咯烷酮(PVP)为稳定剂,首先采用KBH4化学还原法制得球形Ag纳米粒子溶胶(粒径12~18 nm);再将两种溶胶置于500 W卤钨灯下进行光诱导转化实验,一定转化时间后,球形Ag纳米粒子分别转化为单晶Ag纳米三棱体(边长80~120 nm)和立方体(边长90~200 nm).利用透射电子显微镜(TEM)、电子衍射(ED)和紫外-可见吸收光谱(UV-Vis)等手段对单晶Ag纳米三棱体和立方体进行了表征,对光转化过程中Ag 粒子由球形到三棱体和立方体的转变原因进行了初步的分析和探讨.认为主要原因在于不同种类稳定剂在Ag的不同晶面吸附作用不同,从而形成沿某一晶面取向生长的Ag单晶体.
关键词:  光诱导转化  三棱体  立方体  单晶体
DOI:10.1088/1674-0068/17/5/645-648
分类号: