CuInS2/Red Phosphorus Nanosheet Interleaved Heterostructures with Improved Interfacial Charge Transfer for Photoelectrochemical Aptasensing

文献类型： 外文期刊

第一作者： Li, Yunpeng

作者： Li, Yunpeng;Adili, Guliqire;Ma, Yuhua;Liang, Gang;Liu, Jianbo;Ma, Yuhua

作者机构：

期刊名称：ANALYTICAL CHEMISTRY （ 影响因子：6.7； 五年影响因子：6.5 ）

ISSN： 0003-2700

年卷期： 2024 年 96 卷 29 期

页码：

收录情况： SCI

摘要： Accelerating the migration of interfacial carriers in heterojunctions is crucial for achieving highly sensitive photoelectrochemical (PEC) sensing. In this study, we developed three-dimensional (3D)/two-dimensional (2D) CuInS2/red phosphorus nanosheet (CuInS2/RP NS) n-n heterojunction functional materials with enhanced interfacial charge transfer capabilities for PEC sensing. The 3D CuInS2 serves as a conductive layer, providing excellent electronic conductivity and superior electron absorption and transport properties. In contrast, the ultrathin RP NS acts as a transport layer that enhances carrier mobility. The 3D/2D heterojunction ensures a large interface contact surface, shortening the carrier transport distance. A well-aligned band position generates a substantial built-in electric field, providing a significant driving force for efficient carrier separation and migration, thereby improving response sensitivity. A PEC aptamer sensor was constructed based on the synthesized heterostructure for ciprofloxacin detection. The detection limit of the CuInS2/RP NS aptamer sensor for ciprofloxacin is 2.03 x 10(-15) mgmL(-1), with a linear range from 1.0 x 10(-14) to 1.0 x 10(-5) mgmL(-1). This work presents a strategy for enhancing the photoelectric response by modulating the interface structure of heterojunctions, thereby opening new prospects for the application of highly sensitive PEC sensors in antibiotic detection.

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