WANG Kun, YAN Yuxiang, MAO Junkun, et al. Investigation of laser speckle sensing based on polymer-stabilized liquid crystals[J]. 2026, 45(7): 75-79.DOI:
Acetone is a common volatile organic compound (VOC) in industry. In this experiment
polymer-stabilized liquid crystal (PSLC) films with different morphologies are prepared by adopting different mass ratios of 5CB liquid crystal and ultraviolet curing conditions. The sensing of acetone vapor is realized by observing the speckle changes when laser light passes through the PSLC films. The experimental results show that the PSLC gas sensor can achieve the sensing of acetone vapor within the concentration range of 1400×10
-6
to 3400×10
-6
. Both the response time and recovery time reach 60s, and the sensor also exhibits excellent selectivity and repeatability.