银纳米片的绿色化学法合成及其光学性能研究  

Green Chemical Route for Synthesis of Silver Nanoplates and Their Spectral Properties

作　　者：李文芳[1,2] 李丽云[1] 李宏策[1] 

机构地区：[1]湖南机电职业技术学院电气工程系,长沙410151 [2]中南大学物理与电子学院,长沙410083

出　　处：《材料导报（纳米与新材料专辑）》2015年第1期13-16,44,共5页

基　　金：湖南省教育厅科研项目(12C1063;13C255)

摘　　要：结合简便且绿色的方法,在单宁酸体系中制备出银纳米片。该化学反应无需热源,也不需要引入其他任何表面活性剂和形貌控制剂,故是一种能耗低、对环境绿色友好的策略。采用透射电镜、X射线衍射仪、紫外可见分光光度计等测试手段对样品进行分析和表征。系统优化制备银纳米片中单宁酸浓度及溶液pH值的工艺参数,实现了银纳米片的SPR峰从520nm到1100nm可调。Silver nanoplates, with average size tunable from 50 nm to 500 nm, were synthesized via a simple room-temperature solution-phase chemical reduction method in the presence of appropriate concentrations of tannic acid and pH. This synthesis was a seedless process, and does not need any other surfactant or capping agent to direct the anisotropic growth of the nanoparticles. Control experiments have been explored for a more thorough understanding of the growth mechanism. It was found that both the concentrations of tannin and the pH were the key to controlling the silver nanoplates. The optical in-plane dipole plasmon resonance bands of these plates can be tuned from 520 nm to 1100 nm.

关 键 词：银纳米片 单宁酸 绿色友好 表面等离子体共振 

分 类 号：O484[理学—固体物理]