氨
材料科学
制作
解吸
吸附
分析化学(期刊)
单斜晶系
聚对苯二甲酸乙二醇酯
再现性
基质(水族馆)
化学工程
化学
复合材料
色谱法
物理化学
分子
有机化学
病理
工程类
替代医学
地质学
海洋学
医学
作者
Bhuvaneshwari Sakthivel,Libu Manjakkal,N. Gopalakrishnan
标识
DOI:10.1109/jsen.2017.2749334
摘要
Here, we report the fabrication of a flexible room temperature ammonia gas sensor using surfactant-free hydrothermally synthesized copper oxide (CuO) nanorectangles. The structural analysis revealed that the CuO nanorectangles possessed monoclinic structure with an average length and breadth of 950 and 450 nm, respectively. The specific surface area of CuO nanorectangles was determined to be 29 m 2 /g. The sensor was fabricated on a flexible polyethylene terephthalate substrate by screen printing technique. The room temperature ammonia sensing measurement exhibited significant response down to 5 ppm of ammonia with a quick response time of 90 s and recovered to baseline within 120 s. Maximum response of 0.99 was recorded for 100 ppm of ammonia. The rate constants for adsorption and desorption were estimated for 6.5 to 100 ppm of ammonia from the exponential conductance changes during response and recovery process. The sensor showed appreciable stability and reproducibility of the sensing performance over a period of three months. The fabricated flexible sensor demonstrated its ability to detect a wide range of ammonia concentrations at room temperature irrespective of the mechanical deformations applied. Thus, the fabricated sensor is promising and can be suitably employed for practical applications in environments where efficient gas sensing is vitally important.
科研通智能强力驱动
Strongly Powered by AbleSci AI