Publisher : The Korean Institute of Surface Engineering
DOI : 10.5695/JKISE.2015.48.6.309
Title & Authors
Hydrogen Sensing Properties of Multiwall Carbon Nanotubes Decorated with TiO2 Nanoparticles at Room Temperature Park, Sunghoon; Kang, Wooseung;
Multiwall carbon nanotubes are synthesized by using VLS mechanism for the application to gas sensor. MWCNT is not suitable for hydrogen gas sensor due to its low response to the gas. To enhance the gas sensing performance, multiwall carbon nanotubes are coated with nanoparticles. Scanning electron microscopy and Transmission electron microscopy showed that the synthesized MWCNT were well dispersed with the diameter and wall thickness of approximately 10-30nm and 5nm, respectively. The MWCNT sensor showed the sensitivities of 1.33-9.5% for the concentration of 100-5000ppm at room temperature. These sensitivities are significantly improved to 6.64-46.65% by coating nanoparticles to the MWCNT sensor. The mechanisms of gas sensing improvement of the MWCNT sensor coated with nanoparticles are discussed.
Carbon Nano Tube;;;Gas sensor;
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