Lili Xing, Yurong Sun, Runshan Chu, Wenji Li, Xinpeng Chen, Shuaijie Hou, Lei Xu, Ling Li, Guoqiang Chen, Tieling Xing
In this study, a simple, green, and low-cost room temperature synthesis of broccoli-like silver nanoflowers (AgNF) with a particle size of about 300-500 nm was developed using plant-derived caffeic acid as a reducing agent and polyvinylpyrrolidone as a dispersant under ultrasound assistance. The flower clusters covered by small nanocrystals of 20-50 nm significantly enhance the electromagnetic field signals. AgNF was deposited on the surface of silicon wafers as a surface-enhanced Raman spectroscopy sensor for the detection of probe molecules such as rhodamine 6G (R6G) and malachite green with high sensitivity, homogeneity, and reproducibility...
April 10, 2024: Langmuir: the ACS Journal of Surfaces and Colloids