Kim, Do Hong Shim, Young-Seok Jeon, Jong-Myeong Jeon, Hu Young Park, Sung Soo Kim, Young-Woon Kim, Jin-Sang Lee, Jong-Heun Jang, Ho Won 2024-01-20T09:01:25Z 2024-01-20T09:01:25Z 2021-09-02 2014-09-10 1944-8244 https://pubs.kist.re.kr/handle/201004/126358 Vertically ordered nanotube array is a desirable configuration to improve gas sensing properties of the hematite which is the most abundant and cheapest metal oxide semiconductor on earth but has low and sluggish chemiresistive responses. We have synthesized a vertically aligned, highly ordered hematite nanotube array directly on a patterned SiO2/Si substrate and then it used as a gas sensor without additional processing. The nanotube array sensor shows unprecedentedly ultrahigh and selective responses to acetone with detection limits down to a few parts per billion and response time shorter than 3 s. English American Chemical Society GAS-SENSING PROPERTIES HYDROTHERMAL SYNTHESIS GROWTH-MECHANISM ALPHA-FE2O3 TRANSPARENT PERFORMANCE Vertically Ordered Hematite Nanotube Array as an Ultrasensitive and Rapid Response Acetone Sensor Article 10.1021/am504156w 1 ACS Applied Materials & Interfaces, v.6, no.17, pp.14779 - 14784 ACS Applied Materials & Interfaces 6 17 14779 14784 scie scopus 000341544200004 2-s2.0-84907829428 Nanoscience & Nanotechnology Materials Science, Multidisciplinary Science & Technology - Other Topics Materials Science Article GAS-SENSING PROPERTIES HYDROTHERMAL SYNTHESIS GROWTH-MECHANISM ALPHA-FE2O3 TRANSPARENT PERFORMANCE hematite nanotube array acetone sensor earth abundant ultrasensitive