NiO가 장식된 In2O3 Nanorods의 HCHO 감지 특성 향상
Enhanced HCHO Sensing Performance of NiO-decorated In2O3 Nanorods
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Formaldehyde (HCHO) is a major primary indoor air pollutant with various adverse effects on the human body, includingsuch as sickbuilding syndrome, lung cancer, and nasal cancer. Therefore, gas sensors for effective HCHO detection detecting HCHO are crucial formaintaining a healthy indoor environments, and research is being conducted to develop high-performance sensors for this purpose. AnOne of the effective methods for enhancing the to enhance sensing properties is involves modifying the p-n heterojunction structure,which improves sensing through via electronic sensitization based on the expanded depletion region and chemical sensitization that dissociates specific gases. In this studyHerein, weWe fabricated NiO-decorated In2O3 NRs using an e-beam evaporator based on the glancing angle deposition technique by optimizing the NiO thickness (0, 1, 2, and 3 nm). When exposed to 50 ppm HCHO, NiO-decoratedIn2O3 NRs showed a 3.91%-fold enhancement in the gas response (Ra/Rg-1= 23.9) and a 41.47% faster response time (40.7 s) thancompared to bare In2O3 NRs with an extremely low theoretical detection limit of ≈approximately 9.3 ppb.
Abstract
Formaldehyde (HCHO) is a major primary indoor air pollutant with various adverse effects on the human body, includingsuch as sickbuilding syndrome, lung cancer, and nasal cancer. Therefore, gas sensors for effective HCHO detection detecting HCHO are crucial formaintaining a healthy indoor environments, and research is being conducted to develop high-performance sensors for this purpose. AnOne of the effective methods for enhancing the to enhance sensing properties is involves modifying the p-n heterojunction structure,which improves sensing through via electronic sensitization based on the expanded depletion region and chemical sensitization that dissociates specific gases. In this studyHerein, weWe fabricated NiO-decorated In2O3 NRs using an e-beam evaporator based on the glancing angle deposition technique by optimizing the NiO thickness (0, 1, 2, and 3 nm). When exposed to 50 ppm HCHO, NiO-decoratedIn2O3 NRs showed a 3.91%-fold enhancement in the gas response (Ra/Rg-1= 23.9) and a 41.47% faster response time (40.7 s) thancompared to bare In2O3 NRs with an extremely low theoretical detection limit of ≈approximately 9.3 ppb.
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