Temperature sensing properties of the passive wireless sensor based on graphene oxide films

This paper presents a passive wireless temperature sensor with graphene oxide (GO) films as the sensing material. In this sensor a temperature sensitive capacitor is used in a LC tank circuit. The resonant frequency of the tank circuit changes with the temperature. The test results imply that the temperature sensor based on graphene oxide films with proper concentration provides a sensitivity of 59.3 kHz /°C from -C40°C to 0 °C and 46.1 kHz /°C from 10°C to 60°C. The relationship between the sensing properties and dispersion concentrations is also studied. The measured results imply that the sensor based on GO films with proper concentration shows monotonic relationship over a certain temperature range between the sensing resonant frequency and temperature.

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