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  Ultrasensitive H2S gas sensors based on p-type WS2 hybrid materials

Asres, G. A., Baldovi, J., Dombovari, A., Järvinen, T., Lorite, G. S., Mohl, M., et al. (2018). Ultrasensitive H2S gas sensors based on p-type WS2 hybrid materials. Nano Research, 11(8), 4215-4224. doi:10.1007/s12274-018-2009-9.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0001-B16C-E Version Permalink: http://hdl.handle.net/21.11116/0000-0003-A490-0
Genre: Journal Article

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Asres2018_Article_UltrasensitiveH2SGasSensorsBas.pdf (Publisher version), 3MB
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This article is distributed under the terms of the Creative Commons Attribution 4.0 International License, which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
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12274_2018_2009_MOESM1_ESM.pdf (Supplementary material), 2MB
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"Ultrasensitive H2S gas sensors based on p-type WS2 hybrid materials"
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https://dx.doi.org/10.1007/s12274-018-2009-9 (Publisher version)
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"Ultrasensitive H2S gas sensors based on p-type WS2 hybrid materials"

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 Creators:
Asres, G. A.1, Author
Baldovi, J.2, 3, Author              
Dombovari, A.1, Author
Järvinen, T.1, Author
Lorite, G. S.1, Author
Mohl, M.1, Author
Shchukarev, A.4, Author
Paz, Alejandro Pérez, Author
Xian, L. D.2, 3, Author              
Mikkola, J.-P.4, 5, Author
Spetz, A. L.1, 6, Author
Jantunen, H.1, Author
Rubio, A.2, 3, Author              
Kordas, K.1, Author
Affiliations:
1 Microelectronics Research Unit, Faculty of Information Technology and Electrical Engineering, University of Oulu, ou_persistent22              
2Theory Group, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_2266715              
3Nano-Bio Spectroscopy Group, European Theoretical Spectroscopy Facility (ETSF), Universidad del País Vasco, CFM SCIC-UPV/EHU- MPC DIPC, ou_persistent22              
4Technical Chemistry, Department of Chemistry, Chemical-Biological Centre, Umeå University, ou_persistent22              
5 Industrial Chemistry & Reaction Engineering, Department of Ch emical Engineering, Johan Gadolin Process Chemistry Centre, Åbo Akademi University, ou_persistent22              
6Sensor and Actuator Systems, Department of Physics, Chemistry and Biology, Link öping University, ou_persistent22              

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Free keywords: WS2, nanowire, nanoflake, gas sensor, H2S, O doping
 Abstract: Owing to their higher intrinsic electrical conductivity and chemical stability with respect to their oxide counterparts, nanostructured metal sulfides are expected to revive materials for resistive chemical sensor applications. Herein, we explore the gas sensing behavior of WS2 nanowire-nanoflake hybrid materials and demonstrate their excellent sensitivity (0.043 ppm-1) as well as high selectivity towards H2S relative to CO, NH3, H2, and NO (with corresponding sensitivities of 0.002, 0.0074, 0.0002, and 0.0046 ppm-1, respectively). Gas response measurements, complemented with the results of X-ray photoelectron spectroscopy analysis and first-principles calculations based on density functional theory, suggest that the intrinsic electronic properties of pristine WS2 alone are not sufficient to explain the observed high sensitivity towards H2S. A major role in this behavior is also played by O doping in the S sites of the WS2 lattice. The results of the present study open up new avenues for the use of transition metal disulfide nanomaterials as effective alternatives to metal oxides in future applications for industrial process control, security, and health and environmental safety.

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Language(s): eng - English
 Dates: 2018-01-232017-11-162018-01-272018-02-202018-08
 Publication Status: Published in print
 Pages: 10
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1007/s12274-018-2009-9
 Degree: -

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Project name : Funding received from Bio4Energy programme, Academy of Finland (projects Suplacat and ClintoxNP (No. 268944)), University of Oulu (More than Moore research community) and University of Oulu Graduate School (Infotech Oulu) is acknowledged. We acknowledge support from the EU (No. ERC-2016-AdG-694097 QSpec-NewMat) and the Basque Government “Grupos Consolidados UPV/EHU” (No. IT578-13). J. J. B. and L. D. X. thank the EU for the Marie Curie Fellowship (Nos. H2020-MSCA-IF-2016-751047 and H2020-MSCA-IF-2015-709382). A. P. P. thanks postdoctoral fellowship from the Spanish “Juan de la Cierva-incorporación” program (No. IJCI-2014-20147). We also would like to acknowledge Sami Saukko (Center of Microscopy and Nanotechnology, University of Oulu) for his assistance with TEM analyses. A. L. S. acknowledges the Swedish Government Strategic Research Area in Materials Science on Functional Materials at Linköping University (Faculty Grant SFO-Mat-LiU No. 2009-00971).
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Source 1

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Title: Nano Research
Source Genre: Journal
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Publ. Info: Beijing, China : Tsinghua University Press
Pages: 10 Volume / Issue: 11 (8) Sequence Number: - Start / End Page: 4215 - 4224 Identifier: ISSN: 1998-0124
CoNE: /journals/resource/1998-0124