High sensitive detection of volatile organic compounds using superhydrophobic quartz crystal microbalance
High sensitive detection of volatile organic compounds using superhydrophobic quartz crystal microbalance
复制标题
DOI：
10.1016/j.snb.2012.01.051
复制
发表时间：
2012-03-31
影响因子：
8.4
通讯作者：
Saito, Nagahiro
中科院分区：
文献类型：
--
作者：
Andreeva, Nina;Ishizaki, Takahiro;Saito, Nagahiro
研制了一种涂有超疏水膜的石英晶体微天平（QCM）化学传感器，用于检测甲醛和甲苯等挥发性有机化合物（VOCs）。采用微波等离子体增强化学气相沉积法（MPECVD）制备了超疏水薄膜。在室温条件下研究了涂有超疏水膜的QCM传感器对甲醛和甲苯等挥发性有机污染物的灵敏度。通过超疏水表面修饰，传感器对甲醛和甲苯的灵敏度得到了显著提高。表面改性促进了膜表面的微观织构化，从而增加了传感器对甲醛和甲苯的吸附的有效比表面积。此外，与传统QCM传感器相比，超疏水膜的存在使得水分子的吸附量最小化，从而促进了甲醛和甲苯分子在超疏水膜QCM传感器上的优先吸附.此外，还对甲醛-水和甲苯-水分子在超疏水膜上的吸附机理进行了探讨。(C)2012爱思唯尔有限公司版权所有。
A quartz crystal microbalance (QCM) chemical sensor coated with superhydrophobic film for detecting volatile organic compounds (VOCs) such as formaldehyde and toluene under ambient conditions was developed. The superhydrophobic film was deposited by means of microwave plasma enhanced chemical vapor deposition (MPECVD). The sensitivities of QCM sensor coated with superhydrophobic film to VOCs such as formaldehyde and toluene were investigated under ambient conditions. The sensitivity of the sensor to formaldehyde and toluene was considerably improved by the superhydrophobic surface modification. The surface modification promoted microscopic texturing to the film surface and thus increased the effective specific surface area of the sensor for the adsorption of formaldehyde and toluene. In addition, the adsorption of water molecules was minimized due to the superhydrophobic film deposited on the sensor surface, thus promoting the preferential adsorption of formaldehyde and toluene molecules on the QCM sensor coated with superhydrophobic film, compared to the conventional QCM sensor. Moreover, the adsorption mechanisms of formaldehyde-water and toluene-water molecules to the superhydrophobic film were discussed. (C) 2012 Elsevier B.V. All rights reserved.