生物分析
光子上转换
纳米技术
光电流
材料科学
量子点
光电子学
兴奋剂
作者
Hong Liu,Weiwei Wei,Jiajun Song,Jin Hu,Zhezhe Wang,Peng Lin
出处
期刊:Sensors
[Multidisciplinary Digital Publishing Institute]
日期:2024-01-24
卷期号:24 (3): 773-773
被引量:3
摘要
In this work, we report a new concept of upconversion-powered photoelectrochemical (PEC) bioanalysis. The proof-of-concept involves a PEC bionanosystem comprising a NaYF4:Yb,Tm@NaYF4 upconversion nanoparticles (UCNPs) reporter, which is confined by DNA hybridization on a CdS quantum dots (QDs)/indium tin oxide (ITO) photoelectrode. The CdS QD-modified ITO electrode was powered by upconversion absorption together with energy transfer effect through UCNPs for a stable photocurrent generation. By measuring the photocurrent change, the target DNA could be detected in a specific and sensitive way with a wide linear range from 10 pM to 1 μM and a low detection limit of 0.1 pM. This work exploited the use of UCNPs as signal reporters and realized upconversion-powered PEC bioanalysis. Given the diversity of UCNPs, we believe it will offer a new perspective for the development of advanced upconversion-powered PEC bioanalysis.
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