金/二氧化硅中空核壳纳米球的制备与表征  

Synthesis and characterization of hollow core-shell Au/SiO_2 spheres nanoparticles

作　　者：余洁[1] 李为娇[1] 赵玥萍[1] 刘自纯[1] 李文嘉[1] 沈爱国[2] 叶勇[1] 

机构地区：[1]湖北大学化学化工学院,湖北武汉430062 [2]武汉大学分析测试中心,湖北武汉430072

出　　处：《湖北大学学报（自然科学版）》2011年第1期76-79,共4页Journal of Hubei University：Natural Science

基　　金：国家自然科学基金项目(20405011);湖北省自然科学基金项目(2008CDB061)资助

摘　　要：采用水热反应法和正硅酸乙酯水解法制备出核壳结构的Au/C纳米球颗粒以及夹层结构的Au/C/SiO2纳米球颗粒,在空气中锻烧将Au/C/SiO2夹层结构中的碳层除去,得到内部带有可移动纳米金核、壳层厚度约为20 nm的中空Au/SiO2纳米球颗粒.用透射电子显微镜对所制得的纳米微球的形貌进行表征,并用红外光谱、紫外光谱和电子能谱对其进行检测.然后以5-氟尿嘧啶为信号分子,以Au/SiO2中空核壳纳米颗粒作为SERS基底,对其进行Raman光谱采集,得到了良好的增强信号.Core-shell structure of Au/C nanoparticles and silica coated Au/C nanoparticles（Au/C/SiO2 NPs） were prepared by dehydration technique and hydrolysis.Hollow silica nanoparticles with a shell thickness of 20 nm and with movable Au cores inside（Au/air/SiO2 NPs） were further obtained by calcinating carbon shell within Au/C/SiO2 NPs in the air.The morphologies of those obtained nanoparticles were characterized by transmission electron microscopy（TEM）,and its structure was characterized by IR spectroscopy,ultraviolet spectrophotometer and EDX measurement.Good-quality SERS spectra of 5-fluorouracil on this Au/air/SiO2 NPs were observed.

关 键 词：核壳结构 中空纳米球 纳米颗粒 TEOS 

分 类 号：O631[理学—高分子化学]