Acetone gas detection using TiO2 nanoparticles functionalized In2O3 nanowires for diagnosis of diabetes

Abstract

TiO2 nanoparticles functionalized In2O3 nanowires are synthesized by spin coating and a thermal annealing process using In2O3 nanowires synthesized by VLS mechanism and hydrothermally synthesized TiO2 nanoparticles. This sensor exhibits high performance acetone gas detection at low temperatures and ethanol gas detection at high temperatures. Sub-ppm scale acetone gas detection is important when diagnosing diabetes since exhaled breath contains approximately 1.8–10 ppm of acetone gas for diabetes sufferers, whereas it contains under 0.8 ppm of acetone gas for those without diabetes. Some kinds of sensing factors are controlled to enhance the sensing performance of acetone sensors using TiO2 nanoparticles functionalized In2O3 nanowires. In this research, we fabricate an acetone sensor which has good selectivity and responses, and research its sensing mechanisms.