【作者】 王琪； 徐义超； 颜辉； 张国政； 熊孟； 季更生；

【Author】 Qi Wang;Yichao Xu;Hui Yan;Guozheng Zhang;Meng Xiong;Gengsheng Ji;College of Biotechnology, Jiangsu University of Science and Technology;Key Laboratory of Silkworm and Mulberry Genetic Improvement, Ministry of Agriculture,Sericultural Research Institute, Chinese Academy of Agricultural Sciences;

【机构】 江苏科技大学生物技术学院； 中国农业科学院蚕业研究所农业部蚕桑遗传改良重点实验室；

【摘要】 光电化学生物传感器以其固有的激发（光）与检测（电流）信号分离模式为优势,发展成为操作简单快速、高灵敏、低成本的检测方法,广泛应用于食品安全、医学诊断、环境检测等领域。国内外的大量研究主要集中在两个方面,并面临巨大的挑战,即新型生物识别系统的设计和高光电转换效率的光活性材料开发。我们主要研究后者,利用溶剂热和溶液化学法制备了CdS/MoS₂/RGO纳米复合材料,通过优化和对比,获得了更高的光电流响应,这可能归因于CdS、MoS₂和RGO之间形成的协同效应,能有效地抑制电子空穴对的复合,从而提高光电材料的转换效率和光电流产生的稳定性。得益于此,我们成功构建了一种高灵敏、特异性好的光电化学适配体传感器用于赭曲酶毒素A的检测。更多还原

【Abstract】 Photoelectrochemical（PEC） biosensors, which possess a number of useful capabilities, the ability to use separate forms of signal for excitation（light） and detection（photocurrent）, easy operation and rapid detection, high sensitivity and low cost, have found widely applications in food safety, medical diagnosis, environmental monitoring etc. Despite tremendous efforts, the present challenge is to exploit diverse photoactive species which have high photon-to-current conversion efficiency besides the design of novel biological recognition system. Herein, CdS/MoS₂/RGO nanocomposites were synthesized by solvothermal process and solution-chemistry method, the higher photocurrent was obtained when it was compared to MoS₂/RGO nanocomposites. This unusual photovoltaic response arose from the positive synergetic effect between CdS, MoS₂ and RGO components, which would result in the inhibition of electron-hole recombination and hence improved the photoelectric effect and the stability of photocurrent. Benefiting from these, an enhanced PEC aptasensor was constructed for sensitive and specific detection of ochratoxin A（OTA）.更多还原