Giant humidity responsiveness of WSe2 nanosheets for novel electronic listening and touchless positioning interface

Since few years, sensing electronics based on metal oxide, carbon based materials, inorganic–organic hybrid materials have intensively exploited for biomedical applications. The performance of sensors most likely to be relies on high surface to volume ratio of primary sensing elements for better int...

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Bibliographic Details
Published inJournal of materials science. Materials in electronics Vol. 30; no. 3; pp. 3137 - 3143
Main Authors Pataniya, Pratik, Solanki, G. K., Zankat, Chetan K., Tannarana, Mohit, Patel, K. D., Pathak, V. M.
Format Journal Article
LanguageEnglish
Published New York Springer US 01.02.2019
Springer Nature B.V
Subjects
Biomedical materials
Characterization and Evaluation of Materials
Chemistry and Materials Science
Detection
Dynamic response
Human motion
Humidity
Material properties
Materials Science
Nanosheets
Optical and Electronic Materials
Raman spectroscopy
Reproducibility
Sensors
Spectrum analysis
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Summary:Since few years, sensing electronics based on metal oxide, carbon based materials, inorganic–organic hybrid materials have intensively exploited for biomedical applications. The performance of sensors most likely to be relies on high surface to volume ratio of primary sensing elements for better interactions. Monitoring dynamic response demands highly sensitive fast response sensors. Here we report for the first time, high performance sensors based on WSe 2 nanosheets having extrinsic semiconducting behaviour as active resistive sensing material. The WSe 2 nanosheets are synthesized by high yield sonochemical exfoliation technique and are characterized by TEM, absorption spectroscopy and Raman spectroscopy. Subsequently, WSe 2 resistive sensor was fabricated and fast humidity sensing is demonstrated. The sensor was exploited for electronic listening towards human breathing, whistling and speaking. The novel touchless motion sensing applications are also demonstrated. The sensor shows excellent performance with better sensitivity and reproducibility due to optimized material properties and device configuration. Over all, the results advocate development of resistive sensors for biomedical as well as for intelligent touchless sensing applications.
ISSN:0957-4522
1573-482X
DOI:10.1007/s10854-018-00593-2