Abstract
A new highly sensitive strain sensor has been developed by applying the change of electronic conductivity of CNTs. In order to control the shape of MWCNTs, MWCNT is developed by applying a chemical vapor deposition (CVD) method. It was found that the shape of MWCNTs can be controlled by changing the thickness of catalyst particles and deposition temperature. The MWCNT bundles with the aspect ratio of 20 were grown by using the optimal growth conditions. This bundle structure showed the high load sensitivity of 10 mN.
