山莓状Au-树脂微球的制备及SERS性能  

Fabrication of Raspberry-like Au-Resin Microspheres and the SERS Performance

作　　者：王晶[1] 孙春生[1] 刘雪锋[1] 王铖[1] 

机构地区：[1]江南大学教育部食品胶体与生物技术重点实验室化学与材料工程学院,无锡214122

出　　处：《高等学校化学学报》2013年第3期563-566,共4页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:21071065);教育部留学回国人员科研启动基金(批准号:教外司留[2011]1139)资助

摘　　要：采用抗坏血酸在室温下液相还原AuCl4--阴离子交换树脂微球,同时实现Au微柱的形成及在树脂表面的阵列型组装,低成本高通量地得到山莓状Au-树脂微球;以苯硫酚为探针考察了山莓状Au-树脂微球用作表面增强拉曼散射(SERS)活性基底的性能,结果表明,Au-树脂微球具有良好的Raman增强效应(增强因子EF达到108～109量级),且有很高的重现性和稳定性,Raman信号强度和EF的相对标准偏差(RSD)为(35±5)%.The high throughout and cost-effective fabrication strategy of raspberry-like Au-Resin microspheres,with the anion exchange resin microsphere as the inner core and the monolayer array of micro-sized Au posts as the outer shell,was achieved by the reduction reaction of AuCl-4-Resin by ascorbic acid in aqueous solutions.The formation of Au micro-sized posts and the corresponding array were simultaneously obtained in a single step.The performance of surface enhanced Raman scattering（SERS） for the raspberry-like Au-Resin microspheres was explored using benzenethiol as the probe.The SERS enhanced factor（EF） is in the range of 108—109 orders of magnitude,the relative standard deviation（RSD） of both Raman intensity and EF is about（35±5）%,which indicates that the raspberry-like Au-Resin microspheres can be used as the excellent SERS active substrates with high reproducibility and stability.

关 键 词：山莓状Au-树脂微球 Au微柱阵列 表面增强拉曼散射基底 

分 类 号：O657[理学—分析化学] O611[理学—化学]