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• W2794373604 abstract "Monitoring cancer biomarkers in biological fluids has become a key tool for disease diagnosis, which should be of easy access anywhere in the world. The possibility of reducing basic requirements in the field of electrochemical biosensing may open doors in this direction. This work proposes for this purpose an innovative electrochemical immunosensing system using a photovoltaic cell as an electrical reading box. Immunosensing ensures accuracy, the electrochemical-ground of the device ensures sensitivity and detectability, and the photovoltaic cell drives the system towards electrical autonomy. As proof-of-concept, Carcinoembryonic antigen (CEA) was used herein, a cancer biomarker of clinical relevance. In brief, a conductive glass with a fluorine doped tin oxide film was used as conductive support and modified with anti-CEA by means of a bottom-up approach. All stages involved in the biochemical modification of the FTO surface were followed by electrochemical techniques, namely electrochemical impedance spectroscopy and cyclic voltammetry. This electrode acted as counter electrode of a dye-sensitized solar cells, and the electrical output of this cell was monitored for the different concentrations of CEA. Under optimized conditions, the device displayed a linear behaviour against CEA concentration, from 5 pg/mL to 15 ng/mL. The immunosensor was applied to the analysis of CEA in urine from healthy individual and spiked with the antigen. Overall, the presented approach demonstrates that photovoltaic cells may be employed as an electrical reading box of electrochemical biosensors, yielding a new direction towards autonomous electrochemical biosensing." @default.
• W2794373604 created "2018-03-29" @default.
• W2794373604 creator A5013383001 @default.
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• W2794373604 date "2018-06-01" @default.
• W2794373604 modified "2023-10-17" @default.
• W2794373604 title "A dye-sensitized solar cell acting as the electrical reading box of an immunosensor: Application to CEA determination" @default.
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• W2794373604 doi "https://doi.org/10.1016/j.bios.2018.02.011" @default.
• W2794373604 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/29448225" @default.
• W2794373604 hasPublicationYear "2018" @default.
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