Preparation of a Nonenzymatic Potentiometric Lactic Acid Biosensor Modified by g-C₃N₄/ZnS Composite Materials on a SnO₂-Coated Flexible Printed Circuit Board
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Abstract
In this study, to enhance sensor performance a nonenzymatic lactic acid (LA) sensor based on SnO2 was developed and modified via graphitic carbon nitride (g-C3N4)/ZnS composite material to enhance its sensing performance. The modified sensor generates a voltage through the reaction between LA and the material, and its performance is characterized using a voltage-time measurement system. Specific evaluation criteria include average sensitivity, linearity, repeatability, response time, selectivity, drift effect, and limit of detection (LOD). Experimental evidence shows that compared to the unmodified SnO2 variant, the g-C3N4/ZnS-modified sensor exhibits superior performance in LA concentrations ranging from 1 to 9 mM, with an average sensitivity of 8.02 ± 0.12 mV/mM and with a linearity of 0.999. This modification significantly enhances sensor performance.
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The fields of interest of the IEEE Sensors Journal are the theory, design , fabrication, manufacturing and applications of devices for sensing and transducing physical, chemical and biological phenomena, with emphasis on the electronics and physics aspect of sensors and integrated sensors-actuators. IEEE Sensors Journal deals with the following:
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