基于黑翅土白蚁翅膀的银膜制备及对有害物的SERS检测  

Preparation of Silver Film Based on Odontotermes Formosanus Wings and SERS Detection of Harmful Substances

作　　者：田恬 常发仙 张德清 司民真 杨永安 TIAN Tian;CHANG Fa-xian;ZHANG De-qing;SI Min-zhen;YANG Yong-an(Key Laboratory of Molecular Spectroscopy,Colleges and Universities in Yunnan Province,Faculty of Physics and Electronic Science,Chuxiong Normal University,Chuxiong 675000,China;Application Institute of Spectroscopy Technology,Faculty of Physics and Electronic Science,Chuxiong Normal University,Chuxiong 675000,China)

机构地区：[1]楚雄师范学院物理与电子科学学院云南省高校分子光谱重点实验室,云南楚雄675000 [2]楚雄师范学院物理与电子科学学院光谱应用技术研究所,云南楚雄675000

出　　处：《光谱学与光谱分析》2024年第5期1233-1238,共6页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金项目(11364001);云南省地方本科高校基础研究联合专项资金项目(202001BA070001-030,202001BA070001-095);云南省高等学校大学生创新创业训练计划项目(202111391005)资助。

摘　　要：基于磁控溅射系统制备银纳米薄膜的方法,在黑翅土白蚁(俗称飞蚂蚁)翅膀上沉积银膜制备了三维结构的表面增强拉曼散射光谱(SERS)基底。所制成的基底是聚集了银纳米粒子且保留了黑翅土白蚁翅膀纳米结构的银膜基底。通过优化制备条件,得到在沉积时间为7.5 min时,所制备基底的增强效果最好。用FDTD仿真对不同沉积时间的黑翅土白蚁翅膀银膜基底的增强效果进行了分析,结果清楚地表明溅射时间为7.5 min基底具有更强的电场分布,得到溅射时间为7.5 min基底具有最好的增强效果。这与用罗丹明6G(R6G)探针分子对不同沉积时间的黑翅土白蚁翅膀基底研究的结果是一致的。利用该基底对R6G进行了检测,得到对R6G的检测浓度可达10^(-9)mol·L^(-1),表明该基底具有较好地增强效果。将该基底应用于检测福美双农药,实验结果表明黑翅土白蚁翅膀银膜基底对福美双的检测浓度可达5.0×10^(-8)mol·L^(-1),已经超过了2021年国家制定的福美双溶液残留(4.16×10^(-7)mol·L^(-1))的检测标准,可用于对福美双农药残留的快速检测。另外该基底也有望对其他有害物残留进行快速检测。In this paper,using magnetron sputtering technology,the 3D SERS substrates(Ag/OFW substrates)were prepared by depositing silver films on the wings of Odontotermes Formosanus(commonly known as flying ants).By optimizing the preparation conditions,it was found that the substrate possessed the best enhancement effect when the deposition time was 7.5 minutes.FDTD simulation was used to analyze Ag/OFW substrate's enhancement effect with different deposition times.The results demonstrated that the substrate with the sputtering time of 7.5 min showed stronger electric field distribution;that is to say,the substrate with the sputtering time of 7.5min possessed the best enhancement effect.It was consistent with the results of using rhodamine 6G(R6G)as a probe molecule to conduct an SERS study on the Ag/OFW substrates with different deposition times.The high-performance substrate exhibited a low detection limit(LOD)of 10^(-9)mol·L^(-1)for R6G,indicating an excellent enhancement effect.When the Ag/OFW substrate was employed to solve critical pesticide residue problems for the detection of thiram,the detection concentration of thiram could reach 5.0×10^(-8)mol·L^(-1),which exceeded the detection standard of thiram solution residue(4.16×10^(-7)mol·L^(-1))established by China in 2021.Moreover,the detection method was expected to be used for the rapid detection of the residues of harmful substances.

关 键 词：黑翅土白蚁翅膀 磁控溅射 表面增强拉曼散射光谱 福美双 

分 类 号：O433[机械工程—光学工程]