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Table 1. The gas sensing properties of the sol-gel derived other nanocrystalline semiconductor oxides.

Sensor

Precursors

Calcination temp.

Film thickness (nm)

Crystallite size (nm)

Operating temp.

Sensitivity

Ref.

Zinc Oxide Zinc

Oxide-Pd2+ Catalyst

Barium Strontium Titanate

Lead Zirconate Titanate

Titania

Zinc Acetate

Lead Acetate Trihydrate, Zirconium Acetylacetone, Titanium Isopropoxide

Titanium Butanol

Alkoxide Titanium Butoxide

Titania-Niobium Titanium Butoxide, Oxide Niobium Ethoxide

Titania

Titanium Sulfate, Niobium Chloride

Titania-Niobium Oxide

Titania

Tetraethyl

Ortho-Titanatate

Titanium Isopropyl Alkoxide

Indium Oxide

Indium Oxide-Pt

Indium Oxide-Au

Indium Oxide

3oo-5oo

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