A percolation model of semiconductor gas sensors with a hierarchical pore structure

EAI Endorsed Transactions on Energy Web

S.S. Nalimova¹  A.Ts. Georgieva²  V.A. Moshnikov³  N.D. Yakushova⁴  I.A. Averin⁴  I.A.Pronin⁴  B.V. Donkova⁵  D.Tz. Dimitrov⁵ 

[1] Engineering, University of Florida, Gainesville, FL 32611, USA;;Department of Materials Science &Department of Micro- and Nanoelectronics, Saint-Petersburg Electrotechnical University, Saint-Petersburg 197376, Russia;Department of Nano- and Microelectronics, Penza State University, Penza 440026, Russia;Laboratory of Nanoparticle Science and Technology, Department of General and Inorganic Chemistry, Faculty of Chemistry and Pharmacy, University of Sofia, Sofia 1164, Bulgaria;

关键词: gas sensor;    percolation;    sol-gel method;    fractals;    hierarchical structures;   

DOI  :  10.4108/eai.22-1-2019.156516

来源: DOAJ

【 摘 要 】

A percolation model of gas sensors is proposed, on the basis of which the effect of material porosity, pore size and pore size distribution on the gas detection threshold is analyzed. It is shown that micropores exert the greatest influence on gas sensitive properties. An increase in the percolation threshold leads to an increase in the detection threshold of reducing gases. The developed percolation model is used to explain high sensitivity values of sensor structures obtained by the chemical co-precipitation method.

【 授权许可】

Unknown