A robust nanofilm co-assembled from poly(4-vinylpyridine) grafted carbon nanotube and gold nanoparticles at the water/oil interface as highly active SERS substrate for antibiotics detection

Renyan Zhang ^a , Lin Geng ^a , Xinxing Zhang ^a , Yaqin Sang ^a , Hui Xu ^a,b,*

^a Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China

^b State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing 210023, China

Abstract: The preparation of robust and uniform surface-enhanced Raman scattering (SERS) substrate with high sensitivity and good reproducibility for practical applications remains a challenge. In this work, we develop a general strategy to fabricate robust nanofilms co-assembled from poly(4-vinylpyridine)-grafted carbon nanotube (CNT-g-P4VP) and gold nanoparticles (AuNPs) at the water/oil interface. The prepared CNT-g-P4VP/AuNPs composite nanofilms exhibited better mechanical strength and higher SERS detection sensitivity with good reproducibility, as compared to the nanofilms prepared from pure AuNPs. Also, the CNT-g-P4VP/AuNPs nanofilm can be utilized in rapid SERS detection of two antibiotics (i.e., sulfamonomethoxine and enrofloxacin). Thus, the nanofilm reported here promises great practicality as a robust, efficient, reproducible, and simple-to-fabricate SERS platform.

Applied Surface Science 605 (2022) 154737. (2022年影响因子: 7.392)

论文链接：https://doi.org/10.1016/j.apsusc.2022.154737