| 초록 |
In this study, ACFs were treated with oxygen plasma to investigate the gas-sensing properties of dimethyl methylphosphonate, a simulated gas of chemical weapons, according to the oxygen functional group content of ACFs. As the flow rate of oxygen gas during the plasma treatment increased, the proportion of C-O, C=O and O=C-O bonds increased, and the oxygen content increased by 36.6%. On the other hand, as the flow rate increases, the specific surface area tends to decrease because the activated carbon fiber surface is etched by the active species during oxygen plasma treatment. The resistance change rate of the DMMP gas sensor increased from 4.2% to 25.1% as the oxygen plasma treatment flow rate increased. This is because the surface polarity of ACFs increased by oxygen plasma treatment, and the interaction with DMMP increased. Therefore, oxygen plasma treatment can be also considered as one of the major surface treatment method of detecting DMMP. |
