Metallic 1T-WS2 for Selective Impedimetric Vapor Sensing

Carmen C. Mayorga-Martinez, Adriano Ambrosi, Alex Yong Sheng Eng, Zdeněk Sofer, Martin Pumera

Research output: Contribution to journalArticle

71 Citations (Scopus)

Abstract

Selective gas sensing is of immense importance for industrial as well as safety purposes. Here it is shown that metallic 1T phase transition metal dichalcogenides, such as tungsten sulfide (WS2), provide sensitive and selective platform for gas sensing. Using impedance spectroscopy distinguishable alterations can be detected on the impedance phase spectrum of interdigitated gold electrode modified with chemically exfoliated 1T-WS2 caused by different vapors. In particular, it is found that the impedance phase spectra of 1T-WS2 device present different resonant frequencies with maximum around 1 Hz in the presence of methanol vapor and around 1 kHz in the presence of water vapor. Such a well-distinguished signal allows their selective detection also when they are present in a mixture. The impedance phase spectra allow the selective methanol and water vapor sensing with an impedimetric device based on 1T-WS2. This system utilizing 1T phase of WS2 for selective gas sensing based on impedance spectroscopy opens new avenues for gas sensing and shall find wide spectra of applications.

Original languageEnglish
Pages (from-to)5611-5616
Number of pages6
JournalAdvanced Functional Materials
Volume25
Issue number35
DOIs
Publication statusPublished - 2015 Sep 1

Fingerprint

Gases
Vapors
vapors
impedance
Steam
Water vapor
Methanol
Spectroscopy
gases
Tungsten
water vapor
Sulfides
methyl alcohol
Gold
Transition metals
Natural frequencies
Phase transitions
spectroscopy
Electrodes
resonant frequencies

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Mayorga-Martinez, C. C., Ambrosi, A., Eng, A. Y. S., Sofer, Z., & Pumera, M. (2015). Metallic 1T-WS2 for Selective Impedimetric Vapor Sensing. Advanced Functional Materials, 25(35), 5611-5616. https://doi.org/10.1002/adfm.201502223
Mayorga-Martinez, Carmen C. ; Ambrosi, Adriano ; Eng, Alex Yong Sheng ; Sofer, Zdeněk ; Pumera, Martin. / Metallic 1T-WS2 for Selective Impedimetric Vapor Sensing. In: Advanced Functional Materials. 2015 ; Vol. 25, No. 35. pp. 5611-5616.
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Mayorga-Martinez, CC, Ambrosi, A, Eng, AYS, Sofer, Z & Pumera, M 2015, 'Metallic 1T-WS2 for Selective Impedimetric Vapor Sensing', Advanced Functional Materials, vol. 25, no. 35, pp. 5611-5616. https://doi.org/10.1002/adfm.201502223

Metallic 1T-WS2 for Selective Impedimetric Vapor Sensing. / Mayorga-Martinez, Carmen C.; Ambrosi, Adriano; Eng, Alex Yong Sheng; Sofer, Zdeněk; Pumera, Martin.

In: Advanced Functional Materials, Vol. 25, No. 35, 01.09.2015, p. 5611-5616.

Research output: Contribution to journalArticle

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