Piezoresistive effects in controllable defective HFTCVD graphene-based flexible pressure sensor.

ABSTRACT: In this work, the piezoresistive effects of defective graphene used on a flexible pressure sensor are demonstrated. The graphene used was deposited at substrate temperatures of 750, 850 and 1000 °C using the hot-filament thermal chemical vapor deposition method in which the resultant graphene had different defect densities. Incorporation of the graphene as the sensing materials in sensor device showed that a linear variation in the resistance change with the applied gas pressure was obtained in the range of 0 to 50 kPa. The deposition temperature of the graphene deposited on copper foil using this technique was shown to be capable of tuning the sensitivity of the flexible graphene-based pressure sensor. We found that the sensor performance is strongly dominated by the defect density in the

SUBMITTER: Mohammad Haniff MA 

PROVIDER: S-EPMC4589683 | biostudies-literature | 2015 Oct

REPOSITORIES: biostudies-literature