@article{Abdullah2022, 
author = {Ahmed Z. Abdullah and Adawiya J. Haider and Allaa A. Jabbar},
title = {Pure TiO2/PSi and TiO2@Ag/PSi structures as controllable sensor for toxic gases},
year = {2022},
journal = {AIMS Materials Science},
volume = {9},
number = {4},
pages = {522-533},
keywords = {gas sensor, titanium oxide, pulsed laser deposition, porous silicon, sensitivity, photo-electrochemical etching},
url = {https://www.sciopen.com/article/10.3934/matersci.2022031},
doi = {10.3934/matersci.2022031},
abstract = {In this research, two pellets of titanium dioxide TiO2 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 TiO2/PSi and TiO2@Ag/PSi composites. The composites were then tested as CO2 gas sensors. The electrical measurements of the composites showed a decrease in the electrical resistance of the CO2 gas sensor doped with a metal. Sensitivity to CO2 increased to up to 55% in Ag-doped TiO2 film with a concentration of 2.5%, and the highest sensitivity value was obtained in the pure titanium dioxide film (26%).}
}