Application Of Flexible All Graphite Paper Based Field...

Flexible All Graphite Paper based Field Effect Transistor for motion detection using strain sensing Srinivasulu Kanaparthi, Sushmee Badhulika* Department of Electrical Engineering, Indian Institute of Technology Hyderabad, Hyderabad, 502285, India. *Corresponding author: E-mail: sbadh@iith.ac.in; Telephone: 040-23018443; Fax: 04023016032 Abstract Here we report the fabrication of a flexible all carbon field effect transistor (FET) using a low cost, recyclable and biodegradable cellulose paper as both substrate as well as dielectric and pencil graphite as source, drain, channel and gate without using any other expensive, toxic or non-biodegradable materials. The electron and hole mobility’s of FET are observed to be 180 and 200 cm2v-1s-1 respectively which are comparable to the recently reported values of paper FET with polymer dielectric and cellulose composite dielectrics. The FET was utilized as a strain sensor which shows good sensitivity for low strains of both tensile and compressive type. The mobility of the FET increases with increase in compressive strain and decreases with increase in tensile strain. The sensitivity of the FET sensor increases with the increase in the gate voltage. HERE YOU CAN MAKE A COMMENT ON HOW THIS STRAIN SENSOR IS BETTER THAN SILICON STRAIN SENSORS IN PERFORMANCE. Further we investigated the performance of the sensor by integrating it with hand gloves to detect human motion. The results obtained indicate that the sensor can be utilized