Electrical conduction mechanism and gas sensing properties of Pd-doped TiO2 films
Journal of Non-Crystalline Solids, cilt.357, sa.7, ss.1774-1779, 2011 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 357 Sayı: 7
- Basım Tarihi: 2011
- Doi Numarası: 10.1016/j.jnoncrysol.2011.01.035
- Dergi Adı: Journal of Non-Crystalline Solids
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Sayfa Sayıları: ss.1774-1779
- Anahtar Kelimeler: Electronic properties, Pd-doped TiO2 thin films, Sensor, Sol-gel
- Ankara Yıldırım Beyazıt Üniversitesi Adresli: Evet
Özet
Undoped and Pd-doped titanium oxide thin films (0.5 wt.%) were prepared by the sol-gel technique (dip-coating) on glass and silicon substrates. The as-deposited thin films were compacted by subjecting them to different annealing temperatures (300 °C, 500 °C). The dependences of the electrical conductivity vs. inverse temperature were investigated in air and in vacuum. A study of the effects of Pd-doping, annealing temperature and ambient conditions on their electrical properties was performed. The sensing behavior of titanium oxide thin films exposed to some reducing gases (methane, acetone, ethanol, formaldehyde and liquefied petroleum gas) was carried out, by means of electrical conductivity measurements. All the studied films are most sensitive to formaldehyde, with a special remark for the Pd-doped ones deposited on silicon substrates. © 2011 Elsevier B.V. All rights reserved.