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Ultrasensitive H2S ...
Ultrasensitive H2S gas sensors based on p-type WS2 hybrid materials
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- Asres, Georgies Alene (author)
- Univ Oulu, Finland
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- Baldoví, José J. (author)
- Max Planck Inst Struct and Dynam Matter, Germany; Univ Basque Country, Spain
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- Dombovari, Aron (author)
- Univ Oulu, Finland
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- Järvinen, Topias (author)
- Univ Oulu, Finland
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- Lorite, Gabriela Simone (author)
- Univ Oulu, Finland
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- Mohl, Melinda (author)
- Univ Oulu, Finland
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- Shchukarev, Andrey (author)
- Umeå universitet,Kemiska institutionen,Umea Univ, Sweden
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- Pérez Paz, Alejandro (author)
- Univ Basque Country, Spain; Yachay Tech Univ, Ecuador
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- Xian, Lede (author)
- Max Planck Inst Struct and Dynam Matter, Germany; Univ Basque Country, Spain
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- Mikkola, Jyri-Pekka (author)
- Umeå universitet,Kemiska institutionen,Industrial Chemistry & Reaction Engineering, Department of Chemical Engineering, Johan Gadolin Process Chemistry Centre, Åbo Akademi University, Åbo-Turku, Finland,Umea Univ, Sweden; Abo Akad Univ, Finland
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- Lloyd Spetz, Anita (author)
- Linköpings universitet,Sensor- och aktuatorsystem,Tekniska fakulteten,Univ Oulu, Finland
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- Jantunen, Heli (author)
- Univ Oulu, Finland
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- Rubio, Ángel (author)
- Max Planck Inst Struct and Dynam Matter, Germany; Univ Basque Country, Spain
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- Kordás, Krisztian (author)
- Univ Oulu, Finland
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(creator_code:org_t)
- 2018-02-20
- 2018
- English.
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In: Nano Reseach. - : Springer. - 1998-0124 .- 1998-0000. ; 11:8, s. 4215-4224
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Abstract
Subject headings
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- 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.
Subject headings
- NATURVETENSKAP -- Kemi -- Materialkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Materials Chemistry (hsv//eng)
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Keyword
- WS2
- nanowire
- nanoflake
- gas sensor
- H2S
- O doping
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Asres, Georgies ...
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Baldoví, José J.
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Dombovari, Aron
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Järvinen, Topias
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Lorite, Gabriela ...
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Mohl, Melinda
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Shchukarev, Andr ...
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Pérez Paz, Aleja ...
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Xian, Lede
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Mikkola, Jyri-Pe ...
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Lloyd Spetz, Ani ...
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Jantunen, Heli
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Rubio, Ángel
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Kordás, Krisztia ...
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- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Chemical Science ...
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and Materials Chemis ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Condensed Matter ...
- Articles in the publication
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Nano Reseach
- By the university
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Umeå University
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Linköping University