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Multi-walled carbon nanotubes covalently bonded cellulose composite for chemical vapor sensor
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Paper Abstract

A cellulose solution was prepared by dissolving cotton pulp in LiCl/ N,N-Dimethylacetamide (DMAc) solution, and functionalized multi-walled carbon nanotubes (MWCNTs) were reacted with N, N-Carbonyldiimidazoles to obtain MWCNTs-imidazolides. By acylation of cellulose with MWCNTs-imidazolides, MWCNTs were covalently bonded with cellulose chains. Using the product, MWCNTs covalently bonded cellulose composite (M/C) composite was fabricated with mechanical stretching to align MWCNTs with cellulose. Finally, inter-digital comb electrode was formed on the composite via lift-off process. Chemo-electrical properties of the M/C composite in response of absorption of the volatile vapors corresponding to 1-propanol, 1-butanol, methanol and ethanol were investigated. Due to sensitive and reversible expansion/contraction of the M/C composite matrix in response to absorption of each analyte, the M/C composite showed fast and reversible change in chemo-electrical property. The ranking of relative resistance response of the composite was methanol < ethanol < 1-propanol < 1-butanol.

Paper Details

Date Published: 30 March 2010
PDF: 6 pages
Proc. SPIE 7646, Nanosensors, Biosensors, and Info-Tech Sensors and Systems 2010, 76460Y (30 March 2010); doi: 10.1117/12.847481
Show Author Affiliations
Sungryul Yun, Inha Univ. (Korea, Republic of)
Sang Yeol Yang, Inha Univ. (Korea, Republic of)
Jaehwan Kim, Inha Univ. (Korea, Republic of)

Published in SPIE Proceedings Vol. 7646:
Nanosensors, Biosensors, and Info-Tech Sensors and Systems 2010
Vijay K. Varadan, Editor(s)

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