银单晶纳米线的气相合成及其表面增强拉曼散射特性(英文)  

Vapor-phase synthesis of single-crystalline Agnanowires and their SERS properties

作　　者：李志[1] 祝巍[1] 余庆选[1] 杨乾辉 邵智斌 楼立人[1] 

机构地区：[1]中国科学技术大学物理系,合肥微尺度物质科学国家实验室,安徽合肥230026

出　　处：《中国科学技术大学学报》2014年第2期106-111,共6页JUSTC

基　　金：Supported by the National Natural Science Foundation of China(50772110,50721091);Fundamental Research Funds for the Central Universities(WK2030000004)

摘　　要：通过气-液-固(VLS)机制,利用热蒸发方法在Ag/ZnO同轴结构纳米线中合成了单晶Ag纳米线.ZnO壳的限制作用被认为是促成了Ag单晶相的形成.通过腐蚀掉ZnO壳而获得的银纳米线,其直径可以通过改变源中银的含量来调控.这些高质量的银纳米线具有明显的表面增强拉曼散射(SERS)增强效果.Single-crystalline Ag nanowires with a face-centered cubic （fcc） crystal structure were synthesized inside Ag/ZnO coaxial nanocables by the vapor-liquid-solid （VLS） mechanism through a thermal evaporation route. The confinement of the ZnO shell was believed to be responsible for the emergence of the single-crystalline phase. Ag nanowires with different diameters could be obtained by etching Ag/ZnO coaxial nanocables with modulated core-shell ratio determined by Ag concentration in the source. These high-quality silver nanowires were exolored as sensitive substrates of surface enhanced Raman scattering （SERS）.

关 键 词：银纳米线 化学气相沉积(CVD) 氧化锌 同轴结构纳米线 表面增强拉曼散射(SERS) 

分 类 号：O469[理学—凝聚态物理]