한빛사논문
- 조회371
충남대학교
Annamalai Yamuna a,1, Natarajan Karikalan a,1, Jun-Hee Na b, Tae Yoon Lee a,c
aDepartment of Biomedical Engineering and Department of Convergence System Engineering, Chungnam National University, Daejeon 34134, Republic of Korea
bDepartment of Electrical, Electronics and Communication Engineering Education, Chungnam National University, Daejeon 34134, Republic of Korea
cDepartment of Technology Education, Chungnam National University, Daejeon 34134, Republic of Korea
1Authors are equally contributed.
Corresponding author : Tae Yoon Lee
Abstract
The increasing use of pesticides poses significant threats to both the environment and human health. Safety assessments for controlling or monitoring such potential hazards require on-site sensing devices with facile fabrication and ultralow detection limits. In particular, electrochemical assays satisfy some of these requirements; however, to date, their electrodes have not demonstrated satisfactory stability, selectivity, or sensitivity. This paper reports the development of a simple, efficient electrochemical sensor based on a composite of samarium stannate (Sm2Sn2O7) and laser-induced graphene (LIG) for detecting fenamiphos (FNPS) insecticides in environmental and food samples. A laser photothermal reaction was employed to simultaneously carbonize and amorphize the surface of a Sm2Sn2O7–polyimide film. This single-step reaction furnished a three-dimensional porous LIG network with Sm2Sn2O7 clusters. The resulting Sm2Sn2O7–LIG nanocomposite exhibited enhanced physicochemical properties, surpassing those of its individual components, i.e., LIG and Sm2Sn2O7. Moreover, a glassy carbon electrode modified with Sm2Sn2O7–LIG was employed for the detection of FNPS at remarkably low concentrations of 7.69 nM, exhibiting a high sensitivity of 1.5137 µA µM−1cm−2. Real-time monitoring resulted in a recovery rate of more than 96 % from spiked environmental and food samples, confirming its practical applicability for sensitive FNPS detection.
논문정보
- Research article
- 2023년 12월 (BRIC 등록일 2023-12-26)
- 국내 연구진
- 바이오·의료융합 > 바이오센싱 및 나노바이오물질
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