二步电沉积法制备Au/氧化石墨烯复合薄膜作为SERS基底
Two-Step Electrodeposition Process for Fabrication of Au-Graphene Oxide Hybrid Films as SERS Substrates
作者单位E-mail
徐玲 同济大学材料科学与工程学院, 上海 200092  
姚爱华 同济大学先进土木工程材料教育部重点实验室, 上海 200092
同济大学材料科学与工程学院, 上海 200092 
aihyao@126.com 
胥岩 同济大学材料科学与工程学院, 上海 200092  
王德平 同济大学先进土木工程材料教育部重点实验室, 上海 200092
同济大学材料科学与工程学院, 上海 200092 
 
摘要: 采用二步电沉积方法在Ti片表面制备了Au-氧化石墨烯(Au-GO)复合薄膜,通过XRD、SEM、XPS等对薄膜的组成、结构和形貌进行了表征,并以罗丹明6G(R6G)为探针分子,对Au-GO/Ti基底的SERS活性进行了表征。结果显示,Au纳米颗粒尺寸约为60 nm,均匀、致密分布于GO表面,该基底显示出较高的SERS活性,对R6G分子的检测极限可达~10-10 mol·L-1,增强因子高达约106,且基底显示出良好的稳定性,在冰箱中存放90 d后,SERS活性仅降低30%左右。
关键词:   氧化石墨烯  表面增强拉曼散射  复合薄膜
基金项目: 上海市自然科学基金(No.13ZR1444200)及中央高校基本科研业务费专项基金资助项目。
Abstract: Two-step electrodeposition process was developed to prepare Au nanoparticle-graphene oxide (Au-GO) hybrid film as large-area surface-enhanced Raman scattering (SERS) substrates. The composition, microstructure and morphology of the resultant hybrid film were characterized by XRD, SEM and XPS. Meanwhile, SERS activity of the Au-GO/Ti substrates was also evaluated using rhodamine 6G (R6G) as probe molecules. The results showed that Au nanoparticles with an average size of~60 nm were uniformly deposited on the surface of GO. The substrates exhibited strong and uniform SERS response toward R6G with a detection limit of ~10-10 mol·L-1 and an enhancement factor of ~106. Furthermore, the Raman signal intensity of R6G only decreased to approximately 30% of its initial value after 90 days of storage, indicating the Au-GO/Ti substrate is highly stable and produces reliable SERS measurements
Keywords: Au  graphene oxide  surface-enhanced Raman scattering  hybrid film
投稿时间:2016-06-19 修订日期:2016-09-30
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