Please use this identifier to cite or link to this item: https://scholarbank.nus.edu.sg/handle/10635/224577
Title: FABRICATION OF AG-BASED NANOSTRUCTURES AS SERS SUBSTRATES FOR THE DETECTION OF CONTAMINANTS IN FOOD SAMPLES
Authors: LI LIMIN
ORCID iD:   orcid.org/0000-0002-8698-4068
Keywords: surface-enhanced Raman scattering, poly(dimethylsiloxane), Ag-based nanostructures, interfacial self-assembly, food safety, multivariate data analysis
Issue Date: 5-Jan-2022
Citation: LI LIMIN (2022-01-05). FABRICATION OF AG-BASED NANOSTRUCTURES AS SERS SUBSTRATES FOR THE DETECTION OF CONTAMINANTS IN FOOD SAMPLES. ScholarBank@NUS Repository.
Abstract: Surface enhanced Raman scattering/spectroscopy (SERS) has been widely explored as a sensitive analytical technique. Its broader applications mainly rely on the development of high-performance SERS substrates. Hence, our study reports the facile fabrication of three types of silver-based SERS substrates, namely, the flexible Ag nanocubes@PDMS substrate, the rigid Ag nanocubes array substrate and the multilayered Ag nanowires substrate. These prepared SERS substrates generated strong local electric field enhancement. In the performance validation, they exhibited excellent sensitivity, selectivity, and reproducibility. Meanwhile, these substrates were successfully employed to detect trace amount of assorted contaminants in food samples. Moreover, we explored two advanced multivariate data analysis tools (PLS and SVM) to achieve the quantitative SERS analysis since the conventional univariate data analysis tools are not very suitable for SERS spectra. In summary, our SERS substrates coupled with the advanced multivariate analysis tools can enable a rapid monitoring of food safety qualitatively and quantitatively.
URI: https://scholarbank.nus.edu.sg/handle/10635/224577
Appears in Collections:Ph.D Theses (Open)

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