GaAs基底上金纳米粒子的二维组装及其表面增强喇曼散射活性  

Self\|assembled Au Nanoparticles on GaAs and Its Surface Enhanced Raman Scattering(SERS)\|activity

作　　者：陈海峰[1] 王健[1] 蔡生民 刘忠范[1] 

机构地区：[1]北京大学化学与分子工程学院纳米科学与技术研究中心

出　　处：《高等学校化学学报》1999年第4期620-623,共4页Chemical Journal of Chinese Universities

基　　金：国家"攀登"计划B资助

摘　　要：利用巯基苯胺作耦联分子，成功地将Ａｕ纳米粒子组装到ＧａＡｓ（１００）表面上，并且用ＴＭ－ＡＦＭ观察了纳米粒子在表面上的分布情况．Ｒａｍａｎ研究表明。By using \%p\%\|aminothiophenol(PATP) as the coupling molecular, the Au nanoparticles were successfully self\|assembled onto the GaAs(100) surface. Firstly, the mechanically polished semi\|insulating GaAs(100) wafers were degreased in trichloroethylene, acetone, methanol, and the surface oxides were chemically polished and removed by rinsing them in \{\%V\%(H\-2SO\-4)\}\%V\%(H\-2O\-2)\%V\%(H\-2O)=311, \%V\%(NH\-4OH)\%V\%(H\-2O\-2)\%V\%(H\-2O)=117, HCl and de\|ionized water. Then the wafers were dried with argon and immediately immersed in 1 mmol/L ethanol solution of PATP. After assembling in the solution for 24 h with argon protection, the GaAs(100) wafers with PATP SAMs were ultrasonicated in pure ethanol to remove those physical adsorbed PATP molecules. Assembling of gold nanoparticles(70 nm) were handled by immersing thus prepared GaAs(100) wafers with PATP SAMs in a colloidal gold suspension for 6 h. The gold nanoparticles were scattered over such a surface. Thus the prepared samples showed a s

关 键 词：金纳米粒子 砷化镓 组装 纳米粒子 SERS 

分 类 号：O614.213[理学—无机化学] O614.371[理学—化学]