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<strong>Ammonia gas sensing property of nanocrystalline Cu<sub>2</sub>S thin films</strong>

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Title Statement <strong>Ammonia gas sensing property of nanocrystalline Cu<sub>2</sub>S thin films</strong>
 
Added Entry - Uncontrolled Name Shinde, Mahendra Shantaram; PSGVPMS'S science college Shahada
 
Uncontrolled Index Term specific instrumentation and techniques of general use in physics
Thin films; Copper Sulphide (Cu2S), sensitivity, response times, Ammonia gas sensor
 
Summary, etc. Nanocrystalline semiconducting thin films of copper sulphide (Cu<sub>2</sub>S) were deposited by novel chemical route using aqueous solution of 0.1 M copper chloride, 0.05 M thiourea, complexing agent 10% aqueous ammonia (NH<sub>3</sub>) and hydrazine hydrate. The characterization and gas sensitivity of as deposited Cu<sub>2</sub>S thin film sensor have been investigated. The as deposited Cu<sub>2</sub>S thin films were observed to be very sensitive for NH<sub>3</sub> gas at room temperature. Upon exposure of NH<sub>3</sub> gas the Cu<sub>2</sub>S sensors lead to decrease in resistance which is attributed due to inter-conversion of Cu(I) and Cu(II) charge states. The response to ammonia gas by Cu<sub>2</sub>S thin film is detected at 200 to 500 ppm concentration in air. The maximum sensitivity (19.78%) for ammonia gas by Cu<sub>2</sub>S sensor was found at 500 ppm gas concentration. The quick response (~60 s) and fast recovery (~90 s) are the main features of these sensors. The effects of gas concentrations on the gas sensing performance of the Cu<sub>2</sub>S sensor have been studied and discussed
 
Publication, Distribution, Etc. Indian Journal of Pure & Applied Physics (IJPAP)
2016-06-10 12:52:15
 
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http://op.niscair.res.in/index.php/IJPAP/article/view/1091
 
Data Source Entry Indian Journal of Pure & Applied Physics (IJPAP); ##issue.vol## 51, ##issue.no## 10 (2013): Indian Journal of Pure & Applied Physics
 
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