| 摘要: |
| 表面增强拉曼散射（SERS）光谱是一种高灵敏的检测技术，但制备高活性和低成本的SERS基底仍然是一大挑战.采用低成本的商业数字视频光盘（DVD）作为载体，用电化学技术原位合成金-银（Ag-Au）复合纳米结构作为SERS基底.通过电化学粗糙化技术，无需添加硝酸银（AgNO3）和四氯金酸（HAuCl4）前驱体溶液，就可以在DVD光盘上的沟槽状金银反射层表面上得到Ag-Au轨道团簇形态.经过一系列表征和优化，研究了Ag-Au复合纳米结构的SERS性能.结果表明：这种DVD衍生的SERS基底对不同的拉曼探针分子均表现出优异的增强性能、高均匀性（相对标准偏差（RSD）为7.88％）和出色的稳定性.这种简便高效的制备方法以及较高的SERS活性，使得DVD衍生的SERS基底成为开发便捷和一次性传感平台的较佳选择. |
| 关键词: 表面增强拉曼散射(SERS) 电化学 数字视频光盘(DVD)基底 |
| DOI：10.3969/J.ISSN.1000-5137.2022.04.005 |
| 分类号:O614.24 |
| 基金项目:The National Science Foundation of China （21475088） |
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| From old digital video disk to SERS strips with controllable electrochemical method |
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ZHENG Qiangting, XUE Luyuan, LI Qinyi, WU Yiping, WEN Ying, GUO Xiaoyu, YANG Haifeng
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College of Chemistry and Materials Science, Shanghai Normal University, Shanghai 200234, China
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| Abstract: |
| For surface-enhanced Raman scattering (SERS) spectroscopy as a highly sensitive detection technique, the preparation of substrates with highly active and low cost remains a challenge. In this work, cheap commercial digital video disk (DVDs) were adopted as supports for in situ synthesis of Ag-Au composite nanostructure as SERS substrates by using electrochemical technique. Ag-Au orbital cluster morphology was obtained on the surface of gold and silver reflectors layer with a series of grooves in DVD through the method of electrochemical roughen technique, without addition of the precursor solution of AgNO3 and HAuCl4. After characterization and optimization, the SERS performances of the Ag-Au composite nanostructure were investigated. The results confirmed that this DVD-derived substrate exhibited excellent enhancement performance for different Raman probe molecules, high uniformity (relative standard deviation (RSD) is 7.88%), and better stability in the room temperature. Such a facile and effective preparation along with efficient SERS properties makes DVD-derived SERS substrates be very good candidates for the development of convenient and disposable sensing platforms. |
| Key words: surface-enhanced Raman scattering (SERS) electrochemical digital video disk (DVD) substrate |
