Adsorption-controlled transition of the electrical properties realized in Hematite （alpha-Fe2O3） nanorods ethanol sensing

Adsorption-controlled transition of the electrical properties realized in Hematite （alpha-Fe2O3） nanorods ethanol sensing

Alpha-Fe203 nanorods are synthesized through a hydrotherrnal method with no surfactant introduced and ethanol sensors are fabricated from these nanorods. The device can respond to ethanol vapour in a concentration range from 1 to 1500 parts per million and shows both p-type and n-type responding cha...

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Veröffentlicht in:中国物理：英文版 2011, Vol.20 (5), p.210-214
1. Verfasser: 王翀 王菲菲 付星球 张恩迪 许志
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Sprache:eng
Schlagworte:
Fe2O3
乙醇传感器
化学吸附
控制
浓度范围
电气性能
表面活性剂
赤铁矿
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description Alpha-Fe203 nanorods are synthesized through a hydrotherrnal method with no surfactant introduced and ethanol sensors are fabricated from these nanorods. The device can respond to ethanol vapour in a concentration range from 1 to 1500 parts per million and shows both p-type and n-type responding characteristics during the investigation of the ethanol sensing. The sensor displays a p-type characteristic when the ethanol concentration is low and converted into an n-type characteristic as the concentration exceeds a certain value. Such a phenomenon is attributed to the chemisorbed oxygen, which leads to different modifications of the energy band at the surface, namely, depletion layer or inversion layer.
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subjects Fe2O3
乙醇传感器
化学吸附
控制
浓度范围
电气性能
表面活性剂
赤铁矿
title Adsorption-controlled transition of the electrical properties realized in Hematite （alpha-Fe2O3） nanorods ethanol sensing
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