Visible light assisted NO2 sensing at room temperature by CdS nanoflake array

被引：74

作者：

Li, Hua-Yao ^{[1
]}

Yoon, Ji-Won ^{[1
]}

Lee, Chul-Soon ^{[1
]}

Lim, Kyeorei ^{[1
]}

Yoon, Ji-Wook ^{[1
]}

Lee, Jong-Heun ^{[1
]}

机构：

[1] Korea Univ, Dept Mat Sci & Engn, Seoul 02841, South Korea

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2018年 / 255卷

基金：

新加坡国家研究基金会;

关键词：

Cadmium sulfide; Gas sensor; Nitrogen dioxide; Room temperature; Visible light; GAS SENSOR; OXIDE; FILM; NANOSTRUCTURES; NANOPARTICLES; NANOSHEETS; SURFACE; UV;

D O I：

10.1016/j.snb.2017.09.118

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A Highly ordered CdS nanoflake array was fabricated by CVD, and its gas sensing characteristics were investigated. The sensor exhibited high response (resistance ratio) of 89% to 5 part per million (ppm) nitrogen dioxide (NO2) under green LED illumination (wavelength 500-540 nm, irradiance 21 W/m(2)) with excellent selectivity and little interference by humidity. Moreover, the sensor showed promising potential for operating under fluorescent lamp and natural solar light, which can be used for medical diagnosis and indoor/outdoor environment monitoring. This performance is attributed to the low band gap energy (2.4 eV) of CdS and the unique morphology of nanoflake array which can enhance both the light absorption and conductivity. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：2963 / 2970

页数：8

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