High-sensitivity Acetone Gas Sensors based on Rod-shaped SWCNT-polypyrrole:camphorsulfonic acid Nanocomposites
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초록
내용
In this study, a nanocomposite rod-like structure in which single-walled carbon nanotubes (SWCNTs) were embedded in camphorsulfonic acid (CSA)-doped polypyrrole (PPy), SWCNT@CSA-doped-PPy, was synthesized using emulsion polymerization for an acetone gas sensor. The morphological structure of the surface was analyzed using SEM and TEM, and the chemical structure was confirmed by Raman spectrum. As for the sensor characteristics, it was confirmed that a response of 2.1% was shown at an acetone concentration of 5 ppm, which is at least 30% higher than PPy detected in other types of dopants studied previously. However, the SWCNT@CSA-doped-PPy core-shell nanocomposite was found to be important in the selection of dopants as a gas sensing material, and is considered to be the result of increased applicability in the gas sensor field.