A highly sensitive room temperature humidity sensor based on 2D-WS2 nanosheets

S. G. Leonardi, W. Wlodarski, Y. Li, N. Donato, Z. Sofer, Martin Pumera, G. Neri

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Ambient humidity monitoring is of outmost importance in many technological fields. For this reason, there is still a substantial interest in the development of new simple humidity sensors with high performances. Here it is presented a study to the development of a sensitive, selective and reliable conductometric humidity sensor based on two-dimensional (2D) WS2 nanosheets. The 2D nanomaterial was synthesized by exfoliation of a bulk WS2 with tert–butyllithium, and then deposited onto the interdigitated electrodes of a conductometric ceramic platform. To evaluate the sensing performances, the sensor was exposed to different relative humidity (RH) levels, recording in real time the change of conductivity of the 2D-WS2 layer. The sensor exhibited high sensitivity to humidity at room temperature, showing an increase of the current of about 3 orders of magnitude as RH value was varied between 8% and 85% with fast response and recovery times of 140 s and 30 s, respectively. Field tests, carried out to measure the environmental humidity, demonstrated the good performances of the developed sensor as a highly sensitive and reliable relative humidity probe for environmental applications.

Original languageEnglish
Pages (from-to)21-26
Number of pages6
JournalFlatChem
Volume9
DOIs
Publication statusPublished - 2018 May 1

Fingerprint

Humidity sensors
Nanosheets
Temperature sensors
Atmospheric humidity
Sensors
Nanostructured materials
Recovery
Electrodes
Monitoring

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Surfaces, Coatings and Films
  • Materials Chemistry

Cite this

Leonardi, S. G., Wlodarski, W., Li, Y., Donato, N., Sofer, Z., Pumera, M., & Neri, G. (2018). A highly sensitive room temperature humidity sensor based on 2D-WS2 nanosheets. FlatChem, 9, 21-26. https://doi.org/10.1016/j.flatc.2018.05.001
Leonardi, S. G. ; Wlodarski, W. ; Li, Y. ; Donato, N. ; Sofer, Z. ; Pumera, Martin ; Neri, G. / A highly sensitive room temperature humidity sensor based on 2D-WS2 nanosheets. In: FlatChem. 2018 ; Vol. 9. pp. 21-26.
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Leonardi, SG, Wlodarski, W, Li, Y, Donato, N, Sofer, Z, Pumera, M & Neri, G 2018, 'A highly sensitive room temperature humidity sensor based on 2D-WS2 nanosheets', FlatChem, vol. 9, pp. 21-26. https://doi.org/10.1016/j.flatc.2018.05.001

A highly sensitive room temperature humidity sensor based on 2D-WS2 nanosheets. / Leonardi, S. G.; Wlodarski, W.; Li, Y.; Donato, N.; Sofer, Z.; Pumera, Martin; Neri, G.

In: FlatChem, Vol. 9, 01.05.2018, p. 21-26.

Research output: Contribution to journalArticle

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