Wireless Microwave VOC Detection Using Polydimethylsiloxane Cantilever Array

Microwave sensors hold promise for monitoring environmental stimuli. This paper outlines a wireless detection method utilizing a PDMS-coated cantilever array to investigate polymer and volatile organic compound (VOC) interactions. It has been demonstrated, a 1 mm thick PDMS-coated cantilevers exhibit mechanical deflection in exposure to 3 mL of THF vapor. The developed wireless VOC monitoring system operates at 9.08 GHz, and captures real-time responses, revealing a 30 MHz variation in the resonant frequency of the reflection coefficient
$S_11$
response. The study contributes to advancing wireless sensing technologies, holding promise for real-world scenarios demanding precise and rapid detection of VOCs in wireless and contactless methods.