金纳米颗粒的水相法合成及荧光性能  

Gold Nanoparticles Prepared by Aqueous Synthesis and Its Fluorescence Properties

作　　者：吕秉峰[1] 李国平[2] 罗运军[2] 

机构地区：[1]中北大学化工与环境学院,太原030051 [2]北京理工大学材料学院,北京100081

出　　处：《高等学校化学学报》2010年第8期1502-1505,共4页Chemical Journal of Chinese Universities

基　　金：北京理工大学基础研究基金资助项目(批准号:20080942004)资助

摘　　要：在水溶液中,以PAMAM树形分子为模板,乙醇为还原剂,制备了树形分子包裹的金纳米颗粒,其水溶性好,可以稳定放置1年以上;通过控制Au3+与PAMAM树形分子的摩尔比,可以得到粒径可控的金纳米颗粒,其粒径范围为1～4nm,分别在385和402nm处出现强的共振瑞利光散射峰和荧光峰.室温下,荧光量子产率达到10%以上,比其它文献报道的金纳米颗粒的荧光量子产率高2个数量级以上,这一特性使其在潜指纹识别、光催化等方面具有很大的应用潜力.Au nanoparticles encapsulated by PAMAM dendrimers were prepared using PAMAM dendrimers as template and ethanol as reducing agent in water medium,respectively,which have good water-solubility and well-stability in water phase for more than 1 year.Au nanoparticles with controlled size in a range of 1—4 nm were obtained by changing the molar ratio of Au^3＋ to PAMAM dendrimers.The results show that there was a strong resonance Rayleigh scattering peak at 385 nm and a fluorescence peak at 402 nm.The photolumine-scence quantum yield of the prepared Au nanoparticles was more than 10% at room temperature,which is about 2 orders of magnitude higher than that of Au nanoparticles prepared by other methods,so it have potential application prospect in fingerprint recognition,photocatalysis and so on.

关 键 词：PAMAM树形分子 金纳米颗粒 共振瑞利光散射 荧光量子产率 

分 类 号：O613.53[理学—无机化学]