Patent ID: 8178157
Filing Date: 2012-05-15
Classification: B82Y,G01N

Abstract:
1. A manufacturing method of a gas sensor, comprising: (a) providing a substrate with a pair of electrodes thereon; (b) coating a mixture of carbon nanotubes and a tin-containing organo-metallic solution on the substrate to fully cover the electrode; wherein the tin-containing organo-metallic solution is formed by solubilizing tin (II)-2-ethylhexanoate in 2-ethylhexanoic acid; and wherein the tin (II)-2-ethylhexanoate in the tin-containing organo-metallic solution is 5% to 20% by weight, and the carbon nanotubes in the organo-metallic solution are 0.0005% to 0.1% by weight; and (c) oxidizing the mixture to obtain a gas sensing porous thin film composed of carbon nanotubes and tin oxide, wherein the oxidizing step is performed at 400 to 700° C. for 20 to 60 minutes.