Asian Science Citation Index is committed to provide an authoritative, trusted and significant information by the coverage of the most important and influential journals to meet the needs of the global scientific community.  
ASCI Database
308-Lasani Town,
Sargodha Road,
Faisalabad, Pakistan
Fax: +92-41-8815544
Contact Via Web
Suggest a Journal
American Journal of Applied Sciences
Year: 2010  |  Volume: 7  |  Issue: 9  |  Page No.: 1277 - 1284

Mathematical Modeling and Characterization of Thin Film, Narrow Gap Sensor Array Units (SAU)

Mahmoud Z. Iskandarani    

Abstract: Design, modeling, testing and analysis multi-gap PbPc sensor array units for the purpose of gas detection are carried out. The tested devices showed reduction in conductance as a function of increasing gap width and reducing film thickness and an increase as a function of temperature up to 160°C. An observed morphological change in the sublimed film is realized at 190°C as the conductance of the sensor array started to drop. Analytical modeling using semi-infinite coplanar electrode arrangement supported the obtained testing results. Problem statement: Stability in gas detection and subsequent discrimination is closely related to sensor design and test parameter and its response to an applied set of chemicals. Approach: To enhance sensor performance and improve sensor designs, a suggested design with mathematical analysis and gas response analysis is carried out. Results: A solid analytical mathematical model is established with both electric field and conductance equations. Effect of deposited sensor film thickness and inter-electrode separation on its response is also established and proved through practical test data. Conclusion: The obtained experimental results agree with the derived mathematical solutions.

View Fulltext    |   Related Articles   |   Back
  Related Articles

No Article Found
Copyright   |   Desclaimer   |    Privacy Policy   |   Browsers   |   Accessibility