种子生长法制备Au-Ag纳米花  

Preparation of Au-Ag Nanoflowers by Seeding Approach

作　　者：孙雪娇[1] 赵丽丽[1] 纪小会[1] 杨文胜[1] 

机构地区：[1]吉林大学化学学院,表面与界面化学吉林省重点实验室,长春130012

出　　处：《高等学校化学学报》2010年第6期1084-1087,共4页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:20803029,20773053,50825202)资助

摘　　要：以金纳米花为种子,抗坏血酸和硝酸银混合物作为生长溶液制备了Au-Ag纳米花.当Ag/Au的摩尔比从0增加到0.3时,银可以在Au种子表面沉积,得到的Au-Ag纳米花光谱在592～518 nm之间连续可调,同时纳米花的枝长逐渐减小;而当Ag/Au摩尔比大于0.3时,还原的银出现自成核现象.与Au纳米花相比,Au-Ag纳米花体现出了更好的Raman增强活性.Au-Ag nanoflowers were prepared by gold nanoflowers as the seeds and the mixture of AgNO3 and ascorbic acid as the growth solution.With increasing the molar ratio of Ag/Au from 0∶1 to 0.3∶1,the surface plasmon band of the Ag-Au nanoflowers shifted from 592 nm to 518 nm.When the molar ratio was higher than 0.3∶1,there was obvious self-nucleation of Ag and the resulting Ag-Au composite particles became spherical-like in shape.Surface enhanced Raman scattering（SERS） measurements by p-mercaptobenzoic acid（p-MBA） indicated that the Au-Ag nanoflowers exhibited improved SERS activity than the gold ones.

关 键 词：纳米花 种子生长法 AU AG 表面增强拉曼 

分 类 号：O614[理学—无机化学]