Ultra-sensitive ethanol sensor based on rapidly synthesized Mg(OH)₂ hexagonal nanodisks

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• 作者：Ahmad Umar^a ; ^{ahmadumar786@gmail.com}  ; [Author Vitae] ; Faten Al-Hazmi^b  ; [Author Vitae] ; Ghulam Nabi Dar^a  ; [Author Vitae] ; Shabi Abbas Zaidi^a  ; [Author Vitae] ; Reem M. Al-Tuwirqi^b  ; [Author Vitae] ; Fowzia Alnowaiserb^c  ; [Author Vitae] ; Ahmad A. Al-Ghamdi^b  ; [Author Vitae] ; S.W. Hwang^a  ; [Author Vitae]
• 关键词：Mg(OH)2 hexagonal nanodisks ; Morphological and structural properties ; Ethanol sensor ; I&ndash ; V technique
• 刊名：Sensors and Actuators B ; Chemical
• 出版年：2012
• 期刊代码：161_09254005
• 类别：et
• 出版时间：20 May, 2012
• 卷：166-167
• 期：Complete
• 页码：97-102
• 文件大小：794 K

摘要

Magnesium hydroxide (Mg(OH)₂) hexagonal nanodisks were synthesized via a facile microwave-assisted hydrothermal process and used, m>for the first timem>, as an efficient electron mediators for the fabrication of efficient ethanol chemical sensor. The synthesized hexagonal nanodisks were characterized in terms of their morphological and structural properties. The detailed morphological and structural investigations reveal that the synthesized Mg(OH)₂ hexagonal nanodisks are grown in high density, and possessing hexagonal crystal structure. Using as-synthesized Mg(OH)₂ hexagonal nanodisks, an efficient and robust ethanol chemical sensor has been fabricated which showed a very high and reproducible sensitivity of 鈭?.89 卤 0.01 渭A cm^鈭? mM^鈭? with a response time of less than 10 s, linear dynamic range from 0.1 渭M to 10 mM and a correlation coefficient of m>Rm> = 0.9957. The limit of detection (LOD) was estimated to be 鈭?3 nM. This work demonstrates that the simply synthesized Mg(OH)₂ nanostructures can effectively be used for the fabrication of efficient ethanol chemical sensors.