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Titanium dioxide (TiO2) and gold doped TiO2 (Au-TiO2) thin films on langasite (LGS) substrates were employed for carbon monoxide (CO) sensing. These two types of sensors have interdigital electrodes with Ti, Ni and Au metallization film. Thin films of TiO2 were deposited using the radio frequency (RF) magnetron sputtering method. Both TiO2 and Au-TiO2 based gas sensors were exposed to low concentrations...
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