Journal
IEEE SENSORS LETTERS
Volume 2, Issue 1, Pages -Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LSENS.2017.2778248
Keywords
Sensor phenomena; impedance spectroscopy; glucose sensor; sensitivity; correlation; double-layer capacitance
Funding
- Imperial College London Junior Research Fellowship Scheme
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In this article, we study the change in the sensitivity and the electrochemical impedance of continuous glucose monitoring sensors over time. In total, 28-day sensitivity and electrical impedance spectroscopy measurement results on four similar sensors are presented. The sensitivity of the sensor is observed to be related to its double-layer capacitance and charge-transfer resistance, based on results acquired from a sensor that showed substantial sensitivity drop. Two data clusters are extracted that relate the sensor sensitivity to its impedance before and after the sensitivity drops by more than 50%.
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