Abstract
In this paper, the e ect of acid pretreatment on the structure and the composition of single-walled carbon nanotube (SWNT) bundles is presented. The change in the sensitivity of gas sensors based on SWNT bundles with various treatments to hydrogen sul de (H2S) exposures is also reported. The experimental results revealed that acid pretreatment not only puri ed the SWNT by removing the catalytic particles from the SWNT bundles but also caused fragmentation of the SWNT bundles and enlargement of the SWNT diameter, thereby improving the sensitivity of the SWNT-based sensor. After a 30-min exposure to 50-ppm H2S at room temperature, the resistances of the non-treated and the 4h-stirred sensors increased 12 % and 38 % respectively, in comparison with their initial values. These ndings open a promising direction in the development of SWNT-based gas sensors.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
