Patent ID: 6881582

Claim:
A process for preparation of a sensitive, fast response thin film ethanol sensor said process comprises dissolving molybdenum trioxide in oxalic acid solution, the said solution being concentrated to give a blue colored solution, adding 2-ethyl hexanoic acid to said blue colored solution, heating the resulting mixed solution to a temperature in the range of 100 to 150° C. for a period in the range of 30-60 minutes to remove water, the said water free solution being maintained at a temperature in the range of 150 to 200° C. for a period in the range of 30-90 minutes to obtain a hot brown colored solution, adding bismuth trioxide slowly to the said brown colored hot solution under reflux, thereby obtaining bismuth molybdenum precursor solution, depositing a thin film of the said precursor solution on a substrate at a temperature in the range of 200 to 400° C., cooling the deposited film, depositing electrode contacts on the said thin film ethanol sensor.