分析物
半导体
信号(编程语言)
光电子学
载流子
材料科学
干扰(通信)
生物传感器
多路复用
纳米技术
电极
化学
计算机科学
电子工程
工程类
电信
频道(广播)
物理化学
程序设计语言
作者
Sirlon F. Blaskievicz,Lúcia H. Mascaro,Yuanzhu Zhao,Frank Marken
标识
DOI:10.1016/j.trac.2020.116154
摘要
Electrochemical sensor signal output, when recorded as a current, is primarily related to the target analyte concentration, but often also related to additional experimental or control parameters. When employing photo-active semiconductor electrodes, light intensity offers an additional control parameter for sensors and opportunities for new reaction/detection or signal amplification pathways. Light stimulation can (i) excite charge carriers to directly interact with analyte, (ii) excite charge carriers to interact with the analyte via a receptor, (iii) provide excited state solution intermediates to generate secondary analyte molecules, (iv) consume the target analyte to give a negative photoelectrochemical signal, or (v) be used to modify or amplify the sensor response. Light activated sensors have been reported for multiplexed arrays. In this perspective, recent developments in photoelectrochemical sensing methods based on semiconductor materials are summarised and new directions and opportunities are highlighted.
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