The beauty inhabited inside the modified Graphene for moisture detection at different frequencies

The present paper details on the synthesis and characterization of the modified Graphene and its moisture sensing application. The characterization tools as Brunauer–Emmett–Teller (BET), Scanning Electron Microscopy (SEM), Electron Dispersive X -rays (EDX), Particle size distribution, Fourier-Transform Infrared (FTIR), UV–Vis spectrophotometry and Raman are employed for characterizing the synthesized material. The BET demonstrations of the synthesized material have a specific surface area as 10.55 m2/g together with pore size distribution range from 10.34 to 97.44 nm, confirming the mesoporous material. The SEM, EDX, FTIR, UV–Vis spectroscopy and Raman analysis of the synthesized material confirmed that it is the modified Graphene (m-Graphene). Presence of the ID/IG = 1.55 confirms more defects along with many dangling bonds which are more beneficial for the humidity detection. The humidity sensing characteristics of m-Graphene based sensor have been observed from 100 Hz to 10 kHz frequencies and the best sensitivity was found at 100 Hz. The sensor shows high sensitivity of 2.51 MΩ/%RH along with the calculated repeatability, response and recovery time of 96.05%, 24 and 13 s, respectively, at room temperature.