不同形貌金纳米粒子的制备及其光谱特性  

Preparation and Optical Properties of Gold Nanoparticles with Different Shapes

作　　者：王平波[1] 宋玉哲[2] 杜雪岩[1] 韩根亮[2] 刘国汉[2] 

机构地区：[1]兰州理工大学甘肃省有色金属材料省部共建国家重点实验室,兰州730050 [2]甘肃省科学院传感技术研究所,兰州730000

出　　处：《功能材料与器件学报》2010年第2期137-142,共6页Journal of Functional Materials and Devices

基　　金：兰州理工大学科研发展基金(No.SB01200602);甘肃省中青年自然科学基金(3YSO61-A25-025)

摘　　要：本文以柠檬酸三钠(Na3C6H5O7.2H2O)保护的小粒径金胶体为晶种,采用晶种法制备了不同形状的金纳米粒子。利用透射电子显微镜(TEM)和紫外可见光谱(UV-Vis)对所制备的金纳米粒子进行了表征。结果表明,随着晶种量的增加,金纳米粒子的形状依次为水滴状、梭状和球状,并且发现梭状金纳米粒子位于850nm处的多极共振吸收峰。基于表征结果分析了不同形貌产物的可能形成机理。Using citrate - stabilized Au colloid as the seeds, we prepared gold nanoparticles with different shapes by a seeding method. TEM and UV -vis were used to characterize the as -prepared gold nanoparticles. The results indicated that the shape of the gold nanoparticles transformed from irregular - shape to spindle - shape, and finally to spherical - shape with the increasing of the amount of Au seeds. UV - Vis spectra show that spindle - shaped gold nanoparticles are of two muhipole - resonances peaks near 850 nm and 970 nm, respectively. The mechanisms of the form of gold nanoparticles with different shapes were also discussed.

关 键 词：金纳米粒子 晶种法 制备 等离子体共振 

分 类 号：TB383[一般工业技术—材料科学与工程]