Comparative H<sub>2</sub>S Sensing Characteristics of Fe<sub>2</sub>O<sub>3</sub>: Thin Film vs. Bulk

作     者：Vishal Balouria Ajay Singh Niranjan Suryakant Ramgir Anil Krishan Debnath Aman Mahajan Ratish Kumar Bedi Dinesh Kumar Aswal Shiv Kumar Gupta 

作者机构：Material Science Laboratory Department of Physics Guru Nanak Dev University Amritsar India. Technical Physics Division Bhabha Atomic Research Center Mumbai India Technical Physics Division Bhabha Atomic Research Center Mumbai India 

出 版 物：《Soft Nanoscience Letters》 (软纳米科学报（英文）)

年 卷 期：2013年第3卷第4期

页      面：6-8页

学科分类：1002[医学-临床医学] 100214[医学-肿瘤学] 10[医学] 

主　　题：Fe2O3 Thin Film Pellets H2S Sensor 

摘      要：Comparative investigations of gas sensing characteristics of Fe2O3 in both thin film as well as bulk forms have been performed. Thin film sensors were realized by first depositing Fe films using electron-beam evaporation followed by thermal oxidation. Bulk sensors in the form of pellets were prepared by cold pressing commercial Fe2O3 powder with subsequent sintering. Both thin film and bulk Fe2O3 sensors exhibited a selective and reversible response characteristics towards H2S with maximum response at an operating temperature of 250°C and 200°C, respectively. A negligible response towards other interfering gases was observed. Thin film sensors exhibited an enhanced response in comparison to that of pellets.