Quartz crystal microbalance coated by PAN nanofibers and PEDOT:PSS for humidity sensor

Fabrication of quartz crystal microbalance (QCM) based humidity sensor has been carried out by electrospinning polyacrylonitrile (PAN) nanofiber followed with deposition of poly (3,4-ethylenedioxythiophene): polystyrene sulfonate (PEDOT:PSS) on the QCM surface. The PAN nanofibers were deposited using electrospinning technique and PEDOT:PSS were deposited using drop and dip coating technique. After dried, the sensors were tested using various relative humidity values ranging from 38% to 59% at a constant room temperature. As a result, the sensitivity of the sensor was showed in very high (about 86.92 Hz/%RH) rate when the deposition of PEDOT:PSS was performed using the dip coating technique.