SnO2/Au multilayer heterostructure for efficient CO sensing

被引：22

作者：

Rehman, Bushra ^{[1
,2
]}

Bhalla, Naman Kumar ^{[1
,3
]}

Vihari, Saket ^{[1
]}

Jain, Shubhendra K. ^{[1
,4
]}

Vashishtha, Pargam ^{[1
,4
]}

Gupta, Govind ^{[1
,4
]}

机构：

[1] Natl Phys Lab, Sensor Devices & Metrol, CSIR, Dr KS Krishnan Marg, New Delhi 110012, India

[2] Jamia Millia Islamia, Ctr Nanosci & Nanotechnol, New Delhi 110025, India

[3] Delhi Technol Univ, Dept Appl Phys, Delhi 110042, India

[4] Acad Sci & Innovat Res, CSIR NPL Campus,Dr KS Krishnan Marg, New Delhi 110012, India

来源：

MATERIALS CHEMISTRY AND PHYSICS | 2020年 / 244卷

关键词：

SnO2; Au; Heterastructure; Gas sensor; Carbon monoxide; GAS SENSORS; ZNO NANORODS; OXIDE; NANOSTRUCTURES; NANOPARTICLES;

D O I：

10.1016/j.matchemphys.2020.122741

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this work, SnO2/Au multilayered heterostructures based gas sensors are fabricated to detect CO gas. The Sn/Au multilayer structure was grown by thermal evaporation method followed by oxidation at elevated temperature. The structural characterization of the grown structures was performed by X-ray diffraction (XRD) and the oxidation analysis was performed by X-ray photoelectron spectroscopy (XPS). The electrical properties of SnO2/Au multilayered heterostructures were studied in the temperature range from 25 degrees C to 300 degrees C and sensing of gas was performed for CO (100 ppm). A significant enhancement in CO sensing at 300 degrees C was observed in SnO2/Au multilayered heterostructures than pristine SnO2. The pristine SnO2 sensor displays a sensitivity of 30.81% while it increased to 67.46% in case of SnO2/Au multilayered heterostructures. The change in the sensitivity could be correlated with the oxygen deficiencies as observed in photoluminescence spectra.

引用

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