Functionalized carbon nanofibers as sensing material for acetone gas

This article proposes a new sensing material made from carbon nanoflbers (CNF) that were first functionalized with a carboxyl group before being further modified with an amide functional group. At room temperature, this sensmg material was used to detect acetone gas. Fischer Esterification was used to create modified CNF with dodecylamine as the functionalizing reactant. FT-IR analysis was used to confirm the attachment of the carboxyl and amide functional groups to the modified CNF. As per the results of the characterization, CNF was successfully modified with the carboxyl and amide functional groups, as evidenced by the presence of new peaks in the FT-IR spectra. The modified CNF was then dropped cast onto IDT and placed in a customised chamber with an electrical feedthrough occupied with outlet/inlet gas. The resistance of modified CNF upon injection of ammonia gas was monitored with a digital multimeter and compared with the resistance of pristine CNF. Based on the result, modified C NF showed a better response and higher sensitivity than pristine CNF at room temperature. The resistance of modified CNF to acetone gas injection was measured using a digital multimeter and compared to the resistance of pristine CNF. Result shown that, modified CNF performed better and had higher sensitivity than pristine CNF at room temperature.