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通过调节两个半导体之间的静电相互作用,对氨酶活性进行光电流极性可切换传感

Rong Liao¹, Si Dai¹, Biao Liu¹

¹Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China), College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, China.

Analytical chemistry

|November 2, 2023

概括

一种新的光电化学 (PEC) 传感方法使用静电相互作用来切换光电极性,提高精度. 这一策略使得可以灵敏地检测氨基酶 (HAase) 活性.

科学领域:

电化学电化学电化学
材料科学材料科学材料科学
生物医学传感传感器

背景情况:

光电化学 (PEC) 传感在精度和抗干扰方面比传统方法具有优势.
开发用于光电流极性可切换PEC传感的新策略对于先进的分析应用至关重要.

研究的目的:

通过操纵半导体光活性材料之间的静电相互作用来引入光电流极性可切换传感的新策略.
使用开发的PEC传感平台,实现对氨酶 (HAase) 活性的敏感和选择性检测.

主要方法:

使用氨酸 (HA) 修改的CuO纳米片和CdS纳米改的光电.
利用HA的HAase诱导水解调节的静电排斥和吸引力来进行光电流切换.
研究基于表面电荷修改的光电流极性切换机制.

主要成果:

经过HA修饰的CuO纳米板表现出负面电荷,防止附着在负电荷的CdS上.
在CuO上,HA的HAase水解会产生正面电荷,从而实现静电吸引和附着.
成功实现了可切换光电极性的HAase检测,其超低检测极限为2 × 10−3 U mL−1和广泛的线性范围 (0.01100 U mL−1).

结论:

该研究提出了一种新的有效策略,用于PEC传感中的光电流极性切换.
开发的方法提供了一种简单而有效的方法,以高灵敏度和选择性检测HAase活动.

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