银三角纳米粒子的制备及其稳定性的研究  

The Preparation and Stability Study of Silver Triangle Nanoparticle

作　　者：冯雪红[1] 冯选旗[2] 黄丽清[1] 徐忠峰[1] 王军[3] 张薇薇[1] 刘悠[1] 李新[1] 程龙[1] 耶红刚[1] 翟立朋 单冬至 高萌[1] 

机构地区：[1]西安交通大学理学院,西安710049 [2]西北大学物理系,西安710069 [3]西安工程大学物理系,西安710048

出　　处：《光子学报》2014年第6期68-71,共4页Acta Photonica Sinica

基　　金：国家自然科学基金(No.11375138);陕西省科学技术研究发展计划项目(No.2009K06-23)资助

摘　　要：室温下,通过控制银种子胶体pH值,采用光诱导法制备出银三角纳米粒子,并对其表面增强喇曼散射活性和时间稳定性进行了实验研究.对比分析了新制备样品与在暗室中存放5个月样品的透射电子显微镜照片、紫外-可见吸收光谱和表面增强喇曼光谱.结果表明:所制备的银三角纳米粒子在室温暗室中存放5个月后其几何形状、尺寸以及相应吸收峰的位置基本不变,具有较好的时间稳定性,对罗丹明6G探针分子仍具有较好的表面增强喇曼效应.Silver triangular nanoparticles were prepared by irradiating silver seed colloid with controlled PH at room temperature. The surface enhanced Raman activity and the time stability of as-prepared silver triangular nanoparticles were investigated by experiments. The comparative analysis results of transmission electron microscopy images, UV-visible spectroscopy and Surface Enhanced Raman Scattering （SERS） spectroscopy of as-prepared sample and sample deposited for 5 months in dark room at room temperature show that the geometric shape, size and maximum absorption wavelength of deposited sample are essentially unchanged, which indicate that as-prepared silver triangular nanoparticles have better time stability. And the deposited sample exhibits strong SERS activity for rhodamine 6G molecules.

关 键 词：纳米材料 等离子共振 光化学方法 银三角纳米粒子 吸收谱 表面增强喇曼光谱 时间稳定性 

分 类 号：O647[理学—物理化学]