Chitosan-poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate)-AuNPs composite for acetone detection using plasmonic image sensor.

Since acetone has more medical and industrial applications, its detection plays a significant role in indirectly measuring some quantities and controlling human safety in medical and industrial areas. In this research, a surface plasmon resonance image sensor was developed based on chitosan, poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT:PSS), and gold nanoparticles for the detection of acetone. The gold nanoparticles have been fabricated using the laser ablation technique, and chitosan-PEDOT: PSS and chitosan-PEDOT: PSS-gold-nanoparticles composite were used to detect the pure acetone vapor form using a surface plasmon resonance image sensor. The response of the sensor was compared with the sensor's response when acetone was mixed with methanol and ethanol. Consequently, the sensor's response to pure acetone was greater than the sensor's response in the presence of methanol or ethanol. The sensor's response is very insignificant when the sensing layer is contacted with pure methanol and ethanol.