We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
PDMS-Based SERS Substrate of High Sensitivity and Uniformity and Its Application in In Situ Detection of Tricyclazole.
- Authors
Wei, Yongkun; Shen, Xilong; Zhang, Lei; Tang, Jie; Xu, Tian; Xu, Meifeng; Fang, Jinghuai; Jin, Yonglong; He, Chuan; Zhou, Ziqiang; Wang, Chaonan
- Abstract
In this paper, flexible and transparent surface-enhanced Raman scattering (SERS) substrate was prepared. First, silver nanoparticles (Ag NPs) were adsorbed onto 2D stretched polydimethylsiloxane (PDMS) and then the stretch was released and nanowrinkles were formed, bringing the adsorbed Ag NPs close to each other. SERS measurement demonstrated really high sensitivity of the Ag/PDMS substrate fabricated under 30% deformation and 120 min assembling time, the enhancement factor (EF) of which was estimated to be 2. 0 6 × 1 0 6 . SERS mapping analysis revealed the proposed Ag/PDMS substrate possessed excellent uniformity with relative standard deviation (RSD) of as low as 5.62%. For real-life applications, the versatile Ag/PDMS substrate could be used for both solution detection and in situ detection of solid objects of any shape. Tricyclazole, a commonly used pesticide, might pollute the leaves of crop and even remain in milk, endangering human health. Therefore, there is practical demand for developing direct on-site detection methods. In this paper, tricyclazole of 10 − 7 M was easily probed by dropping the contaminated milk solution on the proposed substrate and 10 − 6 M tricyclazole sprayed on a leaf exhibited clearly identifiable Raman signals after attaching the proposed substrate to the leaf surface, demonstrating the prepared high-sensitive Ag/PDMS substrate is a competitive tool for rapid, trace and in situ detection. In this paper, modification of the surface functional groups of PDMS by using oxygen plasma treatment is used. The negatively charged Ag NPs connect with PDDA to the PDMS which stretched identically along the two perpendicular directions of a square piece. This substrate can be used for the detection of tricyclazole in milk as well as in situ detection of tricyclazole on the leaf surface.
- Subjects
SERS spectroscopy; OXYGEN plasmas; UNIFORMITY; SILVER nanoparticles; PESTICIDES
- Publication
NANO, 2022, Vol 17, Issue 4, p1
- ISSN
1793-2920
- Publication type
Article
- DOI
10.1142/S1793292022500345