丙酮促进的金纳米棒的光化学生长和溶解(英文)  

Photochemical Growth and Dissolution of Gold Nanorods Promoted by Acetone

作　　者：董守安[1] 杨辅龙[1] 李季[1] 何晓光[2] 张荧荧[2] 

机构地区：[1]昆明贵金属研究所稀贵金属综合利用新技术国家重点实验室,昆明650106 [2]昆明医科大学第一附属医院头颈外科,昆明650031

出　　处：《贵金属》2013年第3期1-6,共6页Precious Metals

基　　金：National Science Foundation of China(No.81160324)

摘　　要：在含有高浓度的HAuCl4单组份表面活性剂的溶液体系中,研究了由丙酮促进的金纳米棒晶种媒介的光化学生长和溶解。结果表明,在晶种媒介的生长溶液中,当丙酮/生长溶液之比高于0.1/25(V/V)时,高产率的金纳米棒(长径比为3.5,平均直径14 nm)能够快速形成;当丙酮/生长溶液之比等于或低于这一临界值时,在化学陈化阶段已形成的金纳米棒则在紫外光照射下溶解。在溶解过程中,金纳米棒发生一系列的形态变化,包括缩短,形成纳米球和完全溶解。进一步的紫外照射最终使溶液成为无色的初始Au(I)-CTAB络合物溶液状态。The seed-mediated photochemical growth and dissolution ofAu NRs promoted by acetone were studied in a single-component surfactant system containing high concentration of HAuC14. The results showed that when the ratio of acetone-to-growth solution was higher than 0.1/25（V/V） in the seed-mediated growth solution, Au NRs of higher yield with an aspect ratio of 3.5 （the average diameter of 14 nm） could be rapidly formed; when the acetone-to-growth solution ratio was equal to or lower than this critical value, in contrast, Au NRs formed at chemical aging stage could be dissolved by UV light. In the process of the dissolution, Au NRs underwent a series of changes on the morphology, including the shortening, forming nanospheres and entire dissolution. Further UV irradiation finally made the solution colorless initial state of Au（I）-CTAB complex solution.

关 键 词：金属材料 金纳米棒 光化学生长 光化学溶解 丙酮 

分 类 号：O644.14[理学—物理化学]