Template- and micelle-free synthesis of rod-like gold nanop-articles with UVA irradiation  

作　　者：李雪征 陆启飞 曾宪顺 王达健 

机构地区：[1]School of Materials Science and Engineering,Tianjin University of Technology [2]Key Laboratory on Display Materials and Photoelectric Devices,Ministry of Education,Tianjin University of Technology [3]Tianjin Key Laboratory for Photoelectric Materials and Devices,Tianjin University of Technology

出　　处：《Optoelectronics Letters》2010年第1期1-5,共5页光电子快报（英文版）

基　　金：supported by the Project of Tianjin Administration of Foreign Experts Affairs (No.S20081200001)

摘　　要：Rod-like gold nanoparticles can be formed from HAuCl4 aqueous solution with ultraviolet (UV) irradiation in the absence of templates, avoiding possible poisonous surfactant embedded into the surface of functional gold nanoparticles applied in biomedicine. The aspect ratio of nanorods ranges from 1.1 to 4.4 with the concentration of HAuCl4 0.2 mM, which can be verified by HRTEM images and the absorption spectrum. It is found that the nanocluster with several atoms occurs prior to the formation of nanorods, highly corresponding to its typical absorption spectrum. Tracing the evolution in absorption spectra of HAuCl4 aqueous solution, it can be concluded that the formation mechanism of gold nanoparticles in this process is different from that in the conventional inductive growth model, possibly in a growth pattern with imperfect oriented attachment (IOA) relevant to the colliding-and-growing.Rod-like gold nanoparticles can be formed from HAuCl4 aqueous solution with ultraviolet （UV） irradiation in the absence of templates, avoiding possible poisonous surfactant embedded into the surface of functional gold nanoparticles applied in biomedicine. The aspect ratio of nanorods ranges from 1.1 to 4.4 with the concentration of HAuCl4 0.2 mM, which can be verified by HRTEM images and the absorption spectrum. It is found that the nanocluster with several atoms occurs prior to the formation of nanorods, highly corresponding to its typical absorption spectrum. Tracing the evolution in absorption spectra of HAuCl4 aqueous solution, it can be concluded that the formation mechanism of gold nanoparticles in this process is different from that in the conventional inductive growth model, possibly in a growth pattern with imperfect oriented attachment （IOA） relevant to the colliding-and-growing.

关 键 词：紫外线照射 模板 高分辨透射电子显微镜 金纳米粒子 物品 黄金 成像 自由 

分 类 号：TB383.1[一般工业技术—材料科学与工程]