UZH-Logo

Maintenance Infos

Humidity sensors based on Aurivillius type Bi2MO6 (M = W, Mo) oxide films


Zheng, K; Zhou, Y; Gu, L; Mo, X; Patzke, G R; Chen, G (2010). Humidity sensors based on Aurivillius type Bi2MO6 (M = W, Mo) oxide films. Sensors and Actuators B: Chemical, 148(1):240-246.

Abstract

Humidity sensors based on Aurivillius type Bi2MO6(M = W or Mo) materials have been fabricated using the ``Doctor Blade'' method. The structure and morphology of the fabricated films were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The sensing properties were investigated with respect to both impedance and capacitance characteristics. The humidity sensing tests displayed ultra-high sensitivities with impedance changes of 4-5 orders of magnitude with the increase of the relative humidity (RH) from 11 to 95%. The Bi2MO6 materials furthermore revealed a rapid response and recovery time with good reproducibility. The sensing properties of the Bi2WO6 sample are superior to those of the Bi2MoO6 materials due to their larger surface-to-volume ratio and different degrees of hydrophilicity. In addition, the sensing mechanism of the Bi2MO6 based sensors is discussed. These results open up promising applications of Aurivillius type oxides in electronic devices for highly sensitive environmental monitoring and humidity control. (C) 2010 Elsevier B.V. All rights reserved.

Humidity sensors based on Aurivillius type Bi2MO6(M = W or Mo) materials have been fabricated using the ``Doctor Blade'' method. The structure and morphology of the fabricated films were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The sensing properties were investigated with respect to both impedance and capacitance characteristics. The humidity sensing tests displayed ultra-high sensitivities with impedance changes of 4-5 orders of magnitude with the increase of the relative humidity (RH) from 11 to 95%. The Bi2MO6 materials furthermore revealed a rapid response and recovery time with good reproducibility. The sensing properties of the Bi2WO6 sample are superior to those of the Bi2MoO6 materials due to their larger surface-to-volume ratio and different degrees of hydrophilicity. In addition, the sensing mechanism of the Bi2MO6 based sensors is discussed. These results open up promising applications of Aurivillius type oxides in electronic devices for highly sensitive environmental monitoring and humidity control. (C) 2010 Elsevier B.V. All rights reserved.

Citations

21 citations in Web of Science®
21 citations in Scopus®
Google Scholar™

Altmetrics

Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Department of Chemistry
Dewey Decimal Classification:540 Chemistry
Language:English
Date:2010
Deposited On:23 Feb 2011 17:41
Last Modified:05 Apr 2016 14:49
Publisher:Elsevier
ISSN:0925-4005
Publisher DOI:https://doi.org/10.1016/j.snb.2010.05.035
Other Identification Number:ISI:000280047400035

Download

Full text not available from this repository.View at publisher

TrendTerms

TrendTerms displays relevant terms of the abstract of this publication and related documents on a map. The terms and their relations were extracted from ZORA using word statistics. Their timelines are taken from ZORA as well. The bubble size of a term is proportional to the number of documents where the term occurs. Red, orange, yellow and green colors are used for terms that occur in the current document; red indicates high interlinkedness of a term with other terms, orange, yellow and green decreasing interlinkedness. Blue is used for terms that have a relation with the terms in this document, but occur in other documents.
You can navigate and zoom the map. Mouse-hovering a term displays its timeline, clicking it yields the associated documents.

Author Collaborations