Colorimetric Signal Readout for the Detection of Volatile Organic Compounds Using a Printable Glass-Based Dielectric Barrier Discharge-Type Helium Plasma Detector

In this paper, we report on a printable glass-based manufacturing method and new proof-of-concept colorimetric signal readout scheme for dielectric barrier discharge (DBD)-type helium plasma photoionization detector. The sensor consists of millimeter-sized glass chamber manufactured using suspension. Plasma inside the chip is generated custom-built power supply (900 V 83.6 kHz), detector uses ∼5 W power. Our detection based detecting change in color after introduction target gases. first captured by smartphone camera as video output. recorded then processed converted to an image light intensity vs retention time plot (gas chromatogram) three standard space models (red, green, blue (RGB), hue, saturation, lightness (HSL), value (HSV)) with RGB performing best among models. We successfully detected different categories volatile organic compounds our 30-m-long gas chromatography column: (1) straight-chain alkanes (n-pentane, n-hexane, n-heptane, n-octane, n-nonane), (2) aromatics (benzene, toluene, ethylbenzene), (3) polar (acetone, ethanol, dichloromethane). limit 10 ng was achieved benzene at room temperature. Additionally, device showed excellent performance types sample mixtures consisting five compounds. combined ability print complex structures provides research avenue analyze their components.