| 학회 |
한국재료학회 |
| 학술대회 |
2020년 가을 (11/18 ~ 11/20, 휘닉스 제주 섭지코지) |
| 권호 |
26권 1호 |
| 발표분야 |
E. 환경/센서 재료 분과 |
| 제목 |
A Facile and Low-cost Paper-based Surface-enhanced Raman Scattering (SERS) Sensor for Label-free Molecular Detection |
| 초록 |
In this work, we propose a facile and low-cost fabrication method of gold nanostructures on cellulose filter paper (CFP) to prepare a paper-based SERS sensor for label-free molecular detection. Polymerized dopamine (PD) was used as an adhesive layer on the CFP and simultaneously functioned as a reducing agent for gold nanoparticle (AuNP) nucleation. Finite-difference time-domain (FDTD) simulations of the electromagnetic field distribution around the nucleated AuNPs at different particle sizes and inter-particle distances were performed to identify the origin of the SERS effect. The substrates prepared at pH 3 with an average size of 102 nm exhibited uniform and excellent molecular sensitivity with a limit of detection (LOD) of 10-7 M for methylene blue. As a practical application, we demonstrated the label-free detection of pesticide residues such as diquat (DQ) and paraquat (PQ) on the apple peels and the pesticides were detected down to a concentration of 1 ppm using portable Raman spectrometer. The developed paper-based SERS sensor is expected to be applied for various on-site and label-free molecular detection system in a label-free method. |
| 저자 |
Vo Thi Nhat Linh1, Dong-Ho Kim2, Sung-Gyu Park1, Ho Sang Jung2
|
| 소속 |
1Advanced Nano Surface Department, 2Korea Institute of Materials Science (KIMS) |
| 키워드 |
Paper-Based Sensor; Surface Enhanced Raman Scattering; Au Nanoparticle
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| E-Mail |
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