In-Vitro Detection of Tooth Decay Using Reduced Graphene Oxide (rGO) based Sensor
Keywords:
In-situ dental applications, reduced graphene oxide, sensor resistance, ph valuesAbstract
The pH in the tooth is related to the tooth cavity, which mainly arises due to the interaction of the cariogenic bacteria with the carbohydrates present in the food. Thus, in this work, to detect the tooth cavity we have fabricated the pH sensor which comprises the interdigitated electrodes (IDEs) mounted on the electrodes on the printed circuit board. Fabricated IDEs have length and width of about 100 mm with 0.05 mm of copper acting as the electrodes. Further, rGO is used as the sensing film to detect the pH. For this purpose, rGO in powder form is converted into the liquid with the help of dispersion in the ethanol followed by sonication for about 20 minutes. Then the rGO sample is drop casted on the fabricated IDEs and subsequently air dried for 24 hrs. Further, we have taken the standard pH solution ranging from 4 to 12 and measured the sensor resistance. Further, to enhance the accuracy of the detection we have implemented the principle component analysis and k-mean algorithm on the self-collected data.
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