QQ客服 官方微博 反馈留言

	用双还原法制备三角形银纳米片及其光学性能; Preparation and Optical Properties of Triangular Silver Nanoplates by a Dual-Reduction Method
	赖文忠 ; 赵威 ; 杨容 ; 李星国
	2010
关键词	双还原法 三角形银纳米片 生长机理 表面等离子共振 表面增强拉曼散射光谱 Dual-reduction method Triangular silver nanoplates Growth mechanism Surface plasmon resonance Surface-enhanced Raman scattering spectrum
英文摘要	在硼氢化钠和柠檬酸三钠共存的体系中还原硝酸银,以聚乙烯吡咯烷酮(PVP)为表面活性剂和保护剂,水浴加热制备得到三角形银纳米片,用X射线衍射(XRD)、透射电子显微镜(TEM)、紫外-可见(UV-Vis)吸收光谱、表面增强拉曼散射(SERS)光谱对其进行了表征.结果表明:三角形银纳米片产物为立方相金属银,边长为(100±40)nm,厚度为(10±5)nm;产物表现出与球形银纳米粒子完全不同的吸收光谱;柠檬酸根在银晶核不同晶面的选择吸附、PVP的包覆作用及Ag(111)晶面的层错对产物的形成起决定作用;与球形纳米颗粒相比,三角形银纳米片膜对吡啶(Py)分子有显著的SERS活性.; Triangular silver nanoplates were successfully prepared by a water-bath heating method NaBH., and sodium citrate were both used as reducing agents while polyvinylpyrrohdone (PVP) was used as a surfactant and protective agent The product was characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM). UV-Vis absorption spectroscopy, and surface-enhanced Raman scattering (SERS) spectrum The product has a cubic face-centered Ag structure The triangular silver nanoplates have a border size of (100 +/- 40) nm and a thickness of (10 +/- 5) nm A growth mechanism is proposed to account for the formation of triangular nanoplates The preferential absorption of citrate on different crystal planes of silver nuclei, the encapsulation function of PVP and the existence of lattice defects in silver crystals plays a significant role in the formation of products Compared with spherical nanoparticles, the triangular silver nanoplates exhibit a different absorption spectrum and strong SERS activity for pyridine (Py) molecules.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000276958400050&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; SCI(E); 中文核心期刊要目总览(PKU); 中国科技核心期刊(ISTIC); 13; 04; 1177-1183; 26
语种	中文
出处	SCI ; 知网
出版者	物理化学学报
内容类型	其他
源URL	[http://hdl.handle.net/20.500.11897/80261]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	赖文忠,赵威,杨容,等. 用双还原法制备三角形银纳米片及其光学性能, Preparation and Optical Properties of Triangular Silver Nanoplates by a Dual-Reduction Method. 2010-01-01.

个性服务

查看访问统计

相关权益政策

暂无数据

收藏/分享

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。