| Title: | Colorimetric Signal Readout for the Detection of Volatile Organic Compounds Using a Printable Glass-Based Dielectric Barrier Discharge-Type Helium Plasma Detector |
| Author(s): | Mao J; Liu L; Atwa Y; Hou J; Wu Z; Shakeel H; |
| Address: | "School of Electronics, Electrical Engineering and Computer Science, Queen's University Belfast, Belfast BT7 1NN, U.K. State Key Laboratory of Millimeter Waves, School of Information Science and Engineering, Southeast University, Nanjing 210096, China. Queen's Management School, Queen's University Belfast, Belfast BT7 1NN, U.K" |
| DOI: | 10.1021/acsmeasuresciau.3c00012 |
| ISSN/ISBN: | 2694-250X (Electronic) 2694-250X (Linking) |
| Abstract: | "In this paper, we report on a printable glass-based manufacturing method and a new proof-of-concept colorimetric signal readout scheme for a dielectric barrier discharge (DBD)-type helium plasma photoionization detector. The sensor consists of a millimeter-sized glass chamber manufactured using a printable glass suspension. Plasma inside the chip is generated using a custom-built power supply (900 V and 83.6 kHz), and the detector uses approximately 5 W of power. Our new detection scheme is based on detecting the change in the color of plasma after the introduction of target gases. The change in color is first captured by a smartphone camera as a video output. The recorded video is then processed and converted to an image light intensity vs retention time plot (gas chromatogram) using three standard color space models (red, green, blue (RGB), hue, saturation, lightness (HSL), and hue, saturation, value (HSV)) with RGB performing the best among the three models. We successfully detected three different categories of volatile organic compounds using our new detection scheme and a 30-m-long gas chromatography column: (1) straight-chain alkanes (n-pentane, n-hexane, n-heptane, n-octane, and n-nonane), (2) aromatics (benzene, toluene, and ethylbenzene), and (3) polar compounds (acetone, ethanol, and dichloromethane). The best limit of detection of 10 ng was achieved for benzene at room temperature. Additionally, the device showed excellent performance for different types of sample mixtures consisting of three and five compounds. Our new detector readout method combined with our ability to print complex glass structures provides a new research avenue to analyze complex gas mixtures and their components" |
| Notes: | "PubMed-not-MEDLINEMao, Jingqin Liu, Longze Atwa, Yahya Hou, Junming Wu, Zhenxun Shakeel, Hamza eng 2023/08/21 ACS Meas Sci Au. 2023 May 30; 3(4):287-300. doi: 10.1021/acsmeasuresciau.3c00012. eCollection 2023 Aug 16" |
