Barium titanate nanoparticle based nonlinear optical humidity sensor

被引：9
|
作者：
Reynolds, Aaron J. [1 ]
Conboy, John C. [1 ]
机构：
[1] Univ Utah, Dept Chem, 315 South 1400 East RM 2020, Salt Lake City, UT 84112 USA
来源：
SENSORS AND ACTUATORS B-CHEMICAL | 2018年 / 273卷
基金：
美国国家科学基金会;
关键词：
Second harmonic generation; Humidity sensor; Barium titanate; 2ND-HARMONIC GENERATION; SURFACE; INTERFACES; PROBE; FILMS; WATER; ADSORPTION; CHEMISTRY;
D O I：
10.1016/j.snb.2018.07.004
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
A second harmonic generation humidity sensor was constructed with a sensing layer composed of cubic phase barium titanate nanoparticles. The sensor shows a linear response up to a relative humidity of 80%, with response times of 40 +/- 10 s for decreasing, and 39 +/- 7 s for increasing humidity. The mechanism of humidity sensitivity is attributed to the modulation of interfacial electric fields due to water vapor adsorption. This research represents the first attempt to bring the surface sensitivity of second harmonic generation to bear on the issue of humidity sensing.
引用
收藏
页码：921 / 926
页数：6
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