title: Synthesis, Structure, and Ethanol Gas Sensing Properties of In2O3 Nanorods Decorated with Bi2O3 Nanoparticles.
abstract: Bi2O3-decorated In2O3 nanorods were synthesized using a one-step process, and their structure, as well as the effects of decoration of In2O3 nanorods with Bi2O3 on the ethanol gas-sensing properties were examined. The multiple networked Bi2O3-decorated In2O3 nanorod sensor showed responses of 171-1774% at ethanol concentrations of 10-200 ppm at 200 °C. The responses of the Bi2O3-decorated In2O3 nanorod sensor were stronger than those of the pristine-In2O3 nanorod sensors by 1.5-4.9 times at the corresponding concentrations. The two sensors exhibited short response times and long recovery times. The optimal Bi concentration in the Bi2O3-decorated In2O3 nanorod sensor and the optimal operation temperature of the sensor were 20% and 200 °C, respectively. The Bi2O3-decorated In2O3 nanorod sensor showed selectivity for ethanol gas over other gases. The origin of the enhanced response, sensing speed, and selectivity for ethanol gas of the Bi2O3-decorated In2O3 nanorod sensor to ethanol gas is discussed.
authors.affiliation: Department of Materials Science and Engineering, Inha University, Yonghyun-dong, Nam-gu, Incheon 402-751, Republic of Korea.
authors.forename: Sunghoon
authors.initials: S
authors.lastname: Park
authors.affiliation: Department of Materials Science and Engineering, Inha University, Yonghyun-dong, Nam-gu, Incheon 402-751, Republic of Korea.
authors.forename: Soohyun
authors.initials: S
authors.lastname: Kim
authors.affiliation: Department of Materials Science and Engineering, Inha University, Yonghyun-dong, Nam-gu, Incheon 402-751, Republic of Korea.
authors.forename: Gun-Joo
authors.initials: GJ
authors.lastname: Sun
authors.affiliation: Department of Materials Science and Engineering, Inha University, Yonghyun-dong, Nam-gu, Incheon 402-751, Republic of Korea.
authors.forename: Chongmu
authors.initials: C
authors.lastname: Lee
keywords: Bi2O3; In2O3; ethanol; gas sensor; nanorods