TY  - JOUR
AU  - Iskandarani, Mahmoud Z. 
PY  - 2010
TI  - Mathematical Modeling and Characterization of Thin Film, Narrow Gap Sensor Array Units (SAU)
JF  - American Journal of Applied Sciences
VL  - 7
IS  - 9
DO  - 10.3844/ajassp.2010.1277.1284
UR  - https://thescipub.com/abstract/ajassp.2010.1277.1284
AB  - 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.