Highly stretchable, sensitive and flexible strain sensors based on MWCNTs fabriated by different methods

Abstract

Three samples of strain sensors have been fabricated and presented in this paper with different methods. First sample was made by spray coating of MWCNTs on poly-dimethylsiloxane (PDMS) substrate; second sample was by depositing of 0.3 wt% of MWCNTs powder on PDMS substrate at 100°C and third sample was fabricated by CVD method to grow MWCNTs array on SiO2 substrate. It revealed from experiment results that strain sensor fabricated by spray coating method showed high sensitivity with tunability from 3.25-19.17 %, high stretchability of 60 %, good linearity and excellent long time stability.