Abstract
Thin films of Cu(II) tetrakis(p-tert-butylphenyl)porphyrin (CuP) and 4-n-octaethyl-porphine ruthenium (II) carbonyl (RuOEPCO) were used as sensing materials for optical detection of ethanol at 100 ppm concentration. Thin films were deposited on polymethyl methacrylate (PMMA) substrate and characterized using Atomic Force Microscopy. A prototype configuration of an optical sensing system in reflectance mode was designed and developed to evaluate the change in the thin film reflectance in the presence of ethanol vapor between 400 to 800 nm. It was found that CuP and RuOEPCO were sensitivity towards the 100 ppm ethanol vapor. Further, the change in the reflectance is reversible and multi-cycle sensitive i.e. thin films gave similar response to ethanol vapor during the repetitive measurements.
| Original language | English (US) |
|---|---|
| State | Published - 2007 |
| Externally published | Yes |
| Event | 2007 ASABE Annual International Meeting, Technical Papers - Minneapolis, MN, United States Duration: Jun 17 2007 → Jun 20 2007 |
Conference
| Conference | 2007 ASABE Annual International Meeting, Technical Papers |
|---|---|
| Country/Territory | United States |
| City | Minneapolis, MN |
| Period | 6/17/07 → 6/20/07 |
Bibliographical note
Funding Information:Thanks are given to J Bixby, B Dickson and W Hendriks for sharing unpublished data, and to J Chilton, R Aricescu and I McKinnell for helpful comments on this manuscript. Work in my laboratory is supported by the Wellcome Trust, University of London Central Research Fund, the Royal Society (UK) and the Medical Research Council.
Keywords
- Electronic nose
- Meat safety
- Optical sensor
- Organic volatile compounds
- Porphyrin
- Thin film