Design of Functionalized Single-Wall Carbon Nanotubes Gas Sensors at Room Temperature
Abstract
Functionalized single-walled carbon nanotubes (SWCNTs) silicon were tested for their ability to detect ammonia (NH3), hydrogen (H2), and nitrogen dioxide (NO2) gas. Drop casting is used to deposit single-walled carbon nanotubes (SWCNTs) on porous silicon. AFM, FT-IR Spectroscopy, X-ray diffraction (XRD), and Scanning Electron Microscopy (SEM) were used to analyze the materials. The properties of F-SWCNT gas sensors were explored and the findings were compared for NH3, H2, and NO2 gas. For NH3 gas, the F-SWCNT sensor shows a considerable improvement in sensor reaction/recovery qualities with good repeatability when compared to H2 and NO2 gases at ambient temperature. The reaction/recovery time of the F-SWCNTs sensor was found to be essentially approximately 20 s at room temperature and 33 s towards NH3 gas. The findings suggest that this sensor might be utilized to detect very small amounts of NH3 gas in a number of applications.