Investigation on temperature effect on alcohol sensing of multi-walled carbon nanotube

Abstract

This research studied the environment temperature affect to alcohol detecting and heated carbon nanotube film after alcohol detecting for a good chemical sensor application. The results showed that at the environment temperature below the room temperature (in this work -5 °C), the percentage of resistance changing is 15.70 % while at the 85 °C is 3.35 %. The heated CNT film after alcohol absorption during detecting time reduces the recovery time of the measurement cycle and reduces the minimum base resistance so increasing sensitivity of ΔR of CNT sensor. The results show that ΔR reaches to 76.22 % at environment temperature -5 °C, heating temperature 85 °C, and recovery time is faster than in the case of room temperature and no heating the film. © 2011 IEEE.