Semiconductor Nanocomposites-Based Photoelectrochemical Aptamer Sensors for Pharmaceuticals Detection

K. O. Okoth, R. Wanjau, M. O. Odago
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Abstract

Development of sensors for pharmaceuticals has become very essential. This is due to the need to monitor the release and toxicological effects of pharmaceuticals into the environment. In this work, the authors explored bismuth sulphide (Bi2S3) nanorods and graphene as photoactive material for constructing a photoelectrochemical (PEC) aptasensor for sulfadimethoxine (SDM) detection, exhibiting high sensitivity, stability, and reproducibility. In another experiment, Mo-doped BiVO4 (Mo-BiVO4) and graphene nanocomposites were explored as photoactive material to construct a visible light-driven photoelectrochemical biosensor. Graphene in the nanocomposites was very essential in immobilizing streptomycin aptamer through π-π stacking interaction. Finally, graphene doped CdS (GR-CdS) synthesized via one pot hydrothermal technique and gold nanoparticles (Au NPs) were employed to construct a PEC aptasensor for diclofenac (DCF).
基于半导体纳米复合材料的光电适体传感器用于药物检测
制药传感器的发展已经变得非常重要。这是由于需要监测药物在环境中的释放和毒理学效应。在这项工作中,作者探索了硫化铋(Bi2S3)纳米棒和石墨烯作为光活性材料,用于构建用于磺胺二甲氧嘧啶(SDM)检测的光电化学(PEC)适体传感器,具有高灵敏度,稳定性和可重复性。在另一项实验中,研究了mo掺杂BiVO4 (Mo-BiVO4)和石墨烯纳米复合材料作为光活性材料,构建可见光驱动的光电化学生物传感器。纳米复合材料中的石墨烯是通过π-π堆叠相互作用来固定链霉素适配体的关键。最后,利用一锅水热法合成的石墨烯掺杂CdS (GR-CdS)和金纳米粒子(Au NPs)构建双氯芬酸(DCF)的PEC传感器。
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