Abstract
The S fiber taper (SFT) aptasensor with a composite sensitive membrane of graphene oxide and gold nanoparticles was proposed for the rapid and highly sensitive detection of bisphenol A (BPA). The SFT was obtained using a fusion splicer; subsequently, the composite film was deposited on its surface, and the specific aptamer was covalently bonded to the surface of gold nanoparticles. The detection mechanism relies on monitoring changes in the external refractive index induced by the specific binding of BPA to the aptamer. The developed SFT aptasensor exhibited a remarkable sensitivity of 15.5 nm/nM and a limit of detection as low as 0.01 nM for BPA. These findings highlight the aptasensor’s potential for diverse monitoring applications.
© 2024 Optica Publishing Group
Full Article | PDF ArticleMore Like This
Xiangshan Li, Ragini Singh, Bingyuan Zhang, Santosh Kumar, and Guoru Li
Opt. Express 32(10) 17239-17254 (2024)
Yujian Liu, Cheng Li, Jing Li, Zhen Wan, and Shangchun Fan
Opt. Lett. 49(7) 1790-1793 (2024)
Bing Sun, Kai Wan, Kaiming Zhou, Zhendong Huang, and Zuxing Zhang
Opt. Lett. 49(7) 1745-1748 (2024)