摘要
通过氧化还原法制备了粒径处于50-65nm的球形银(Ag)纳米粒子,采用扫描电子显微镜(SEM)分析其形貌及单分散性.在Ag纳米粒子基础上采用沉积自组装法合成了有效粒径为80.8nm 的Ag/牛血清白蛋白(BSA)核壳结构纳米粒子. 结合SEM、透射电子显微镜(TEM)、X 射线衍射(XRD)和荧光发射光谱(FL)分析发现,BSA 有效地包覆在Ag 纳米粒子的外层,Ag/BSA 核壳结构纳米粒子单分散性良好,加入Ag/BSA 核壳结构纳米粒子的聚苯乙烯(PS)的荧光强度从100增强到6000.研究结果表明,BSA隔离层对位于Ag表面附近的PS分子的荧光强度有显著的增强效应.
Spherical silver(Ag)nanoparticles with the average diameter 50-65 nm were synthesized by oxidationreduction process.The morphology and monodispersity of the Ag nanoparticles was characterized by scanning electron microscope(SEM).Ag/bovine serum albumin(BSA)core-shell structure nanoparticles approximately80.8nm in effective diameter were fabricated by deposition method and self-assembling onto Ag nanoparticles.The results of SEM,transmission electron microscope(TEM),X-ray diffraction(XRD)and fluorescence emission spectra(FL)showed that BSA effectively coated on the surface of Ag nanoparticles,and Ag/BSA coreshell structured nanoparticles had good monodispersity.Furthermore,fluorescence intensity of PS enhanced from 100 to 6 000 by Ag/BSA core-shell structured nanoparticles.The results showed that BSA isolation layer had significant enhancement effect on fluorescence intensity of PS near the surface of Ag.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2015年第21期21031-21035,共5页
Journal of Functional Materials
基金
国家自然科学基金资助项目(51273048
51203025)