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International Journal of Bio-Inorganic Hybrid Nanomaterials
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(2013). The Study of Pure and Mn Doped ZnO Nanocrystals for Gas-sensing Applications. International Journal of Bio-Inorganic Hybrid Nanomaterials, 2(1), 295-302.
. "The Study of Pure and Mn Doped ZnO Nanocrystals for Gas-sensing Applications". International Journal of Bio-Inorganic Hybrid Nanomaterials, 2, 1, 2013, 295-302.
(2013). 'The Study of Pure and Mn Doped ZnO Nanocrystals for Gas-sensing Applications', International Journal of Bio-Inorganic Hybrid Nanomaterials, 2(1), pp. 295-302.
The Study of Pure and Mn Doped ZnO Nanocrystals for Gas-sensing Applications. International Journal of Bio-Inorganic Hybrid Nanomaterials, 2013; 2(1): 295-302.

The Study of Pure and Mn Doped ZnO Nanocrystals for Gas-sensing Applications

Article 3, Volume 2, Issue 1, Spring 2013, Page 295-302  XML PDF (420.24 K)
Document Type: Research Paper
Abstract
ZnO and ZnO: Mn nanocrystals were synthesized via reverse micelle method. The structural properties of nanocrystals were investigated by XRD. The XRD results indicated that the synthesized nanocrystals had a pure wurtzite (hexagonal phase) structure. Resistive gas sensors were fabricated by providing ohmic contacts on the tablet obtained from compressed nanocrystals powder and the installation of a custom made micro heater beneath the substrate. Sensitivity (S= Ra/Rg) of ZnO and ZnO: Mn nanocrystals were investigated as a function of temperature and concentration of ethanol and gasoline vapor. The obtained data indicated that optimum working temperatures of the ZnO and ZnO: Mn nanocrystals sensors are about 360°C and 347°C for ethanol vapor and about 287°C and 335°C for gasoline vapor. Based on gas sensing results, although Mn impurity reduces the Sensitivity but the sensor got saturated at much higher gas concentration.
Keywords
ZnO Nanocrystals; Gas sensor; Response time; Recovery time; Micelle method
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