银纳米颗粒@二氧化硅微球SERS基底的制备

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英文篇名：The preparation of silver nanoparticles on silica microspheres as SERS substrates 作者：沈启慧 ; 刘曼 ; 李冬梅 ; 韩楠 ; 刘岩 ; 于东冬 ; 周建光 英文作者：SHEN Qi-hui;LIU Man;LI Dong-mei;HAN Nan;LIU Yan;YU Dong-dong;ZHOU Jian-guang;Department of Chemical and Pharmaceutical Engineering,Jilin Institute of Chemical Technology;Hospital of Zhejiang University;State Key Laboratory of Industrial Control Technology,Institute of Cyber-Systems and Control,Zhejiang University; 关键词：原位生长 ; 二氧化硅 ; 银 ; 纳米颗粒 ; 表面增强拉曼散射 英文关键词：in situ;;SiO2;;silver;;nanoparticles;;surface-enhanced raman spectroscopy(SERS) 中文刊名：HXYJ 英文刊名：Chemical Research and Application 机构：吉林化工学院化学与制药工程学院;浙江大学医院;浙江大学控制科学与工程学院智能系统和控制研究所分析仪器研究中心工业控制技术国家重点实验室; 出版日期：2017-12-15 出版单位：化学研究与应用 年：2017 期：v.29 基金：国家科技支撑计划(2016YFC0800901-Z01)资助 语种：中文; 页：HXYJ201712026 页数：3 CN：12 ISSN：51-1378/O6 分类号：159-161

摘要

采用溶胶-凝胶技术制备富含巯基的二氧化硅微球,在其表面原位合成银纳米颗粒,将其作为表面增强拉曼散射(Surface-enhanced Raman scattering,SERS)的活性基底材料,重点讨论了银纳米颗粒作为"热点"对SERS性能的影响。银纳米颗粒的原位生成导致微球表面粗糙化,致密的纳米颗粒能够形成更多的热点,分别采用透射电镜、扫描电镜、X射线光电子能谱、Raman等对银纳米颗粒在微球表面生长状况进行了表征。结果表明,微球表面的巯基直接导致银纳米颗粒的生长,并为银纳米颗粒的稳定性提供了还原性环境。
        The silica microparticles enriched with mercapto groups were prepared by sol-gel method and silver nanoparticles were synthesized in situ on the surface.The microparticles as active matrix for SERS(Surface enhanced Raman scattering).The effect of silver nanoparticles as a " hot spot" on SERS performance was discussed.The in situ formation of silver nanoparticles leads to the roughening of the microspheres,and the dense nanoparticles can form more hot spots.The microspheres were characterized by transmission electron microscopy,scanning electron microscopy,X-ray photoelectron spectroscopy,Raman and so on.The results show that the mercapto groups on the surface of microspheres directly lead to the growth of silver nanoparticles and provide a reducing environment for the stability of silver nanoparticles.

引文

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