Author:
Abdullah Ahmed Z.,Haider Adawiya J.,Jabbar Allaa A.
Abstract
<abstract> <p>In this research, two pellets of titanium dioxide TiO<sub>2</sub> were prepared at room temperature. The first was pure titanium dioxide, and the other was doped with silver (2.5%). The pellets were deposited on porous silicon (PSi) with the pulsed laser deposition (PLD) technique. The results of scanning electron microscopy and energy-dispersive X-ray spectroscopy showed improvements in the surface morphologies of the TiO<sub>2</sub>/PSi and TiO<sub>2</sub>@Ag/PSi composites. The composites were then tested as CO<sub>2</sub> gas sensors. The electrical measurements of the composites showed a decrease in the electrical resistance of the CO<sub>2</sub> gas sensor doped with a metal. Sensitivity to CO<sub>2</sub> increased to up to 55% in Ag-doped TiO<sub>2</sub> film with a concentration of 2.5%, and the highest sensitivity value was obtained in the pure titanium dioxide film (26%).</p> </abstract>
Publisher
American Institute of Mathematical Sciences (AIMS)
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