Miniaturized Paper Based Sensor With Reduced Graphene Oxide as Interdigitated Electrodes for Multiple Applications

A paper-based miniaturized sensor, with reduced graphene oxide (rGO) as an active electrode, has been realized. Using this device, multiple applications, like temperature, breath, blow, and touch sensing, were demonstrated. The sensor showed good sensitivity as well as accuracy. Whatman filter paper of grade-1 was used as a substrate for laser ablation, to form rGO on it in the interdigitated electrode (IDE) format. Subsequently, physico-chemical characterizations of the material with various characterization techniques were carried out. The sensor gives a sensitivity of 1.46% degrees C-1 and the linearity (R-2 = 0.993) with a resolution of 1 degrees C between the temperature range of 25 degrees C-60 degrees C showing the negative temperature coefficient (NTC) of 0.0016 degrees C-1. Further, the sensor has been for breath, blow, and touch-sensing applications.

Automated summary

A paper-based miniaturized sensor with reduced graphene oxide has been developed for temperature, breath, blow, and touch sensing. The sensor exhibits good sensitivity and accuracy. Whatman filter paper was used as a substrate for laser ablation to form rGO as an interdigitated electrode, which was then characterized using various techniques. The sensor shows a sensitivity of 1.46% degrees C-1, linearity (R-2 = 0.993), and a resolution of 1 degrees C within the temperature range of 25 degrees C-60 degrees C, demonstrating a negative temperature coefficient (NTC) of 0.0016 degrees C-1. Furthermore, the sensor has been applied for breath, blow, and touch sensing.