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Room temperature hi...
Room temperature highly toxic NO2 gas sensors based on rootstock/scion nanowires of SnO2/ZnO, ZnO/SnO2, SnO2/SnO2 and, ZnO/ZnO
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- Duoc, Vo Thanh (författare)
- Hanoi Univ Sci & Technol HUST, Int Training Inst Mat Sci ITIMS, 1 Dai Co Viet, Hanoi 100000, Vietnam.
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- Hung, Chu Manh (författare)
- Hanoi Univ Sci & Technol HUST, Int Training Inst Mat Sci ITIMS, 1 Dai Co Viet, Hanoi 100000, Vietnam.
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- Nguyen, Hugo, 1955- (författare)
- Uppsala universitet,Mikrosystemteknik
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- Van Duy, Nguyen (författare)
- Hanoi Univ Sci & Technol HUST, Int Training Inst Mat Sci ITIMS, 1 Dai Co Viet, Hanoi 100000, Vietnam.
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- Van Hieu, Nguyen (författare)
- Phenikaa Univ, Phenikaa Inst Adv Study PIAS, Fac Elect & Elect Engn, Hanoi, Vietnam.
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- Hoa, Nguyen Duc (författare)
- Hanoi Univ Sci & Technol HUST, Int Training Inst Mat Sci ITIMS, 1 Dai Co Viet, Hanoi 100000, Vietnam.
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Hanoi Univ Sci & Technol HUST, Int Training Inst Mat Sci ITIMS, 1 Dai Co Viet, Hanoi 100000, Vietnam Mikrosystemteknik (creator_code:org_t)
- Elsevier, 2021
- 2021
- Engelska.
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Ingår i: Sensors and actuators. B, Chemical. - : Elsevier. - 0925-4005 .- 1873-3077. ; 348
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Grafted structures between SnO2 and ZnO nanowires were realized in a two-step process of growth. First, the rootstocks of SnO2 or ZnO nanowires were synthesized by thermal evaporation technique. Second, a thin Au layer was sputter deposited on the sample and synthesis of nanowire scions of ZnO or SnO2, respectively, on the rootstocks was realized by thermal evaporation technique again. In both growth steps, SnO2 powder or a mixture of ZnO and carbon powders was use as source materials for the synthesis. Different rootstock/scion combinations of SnO2/ZnO, ZnO/SnO2 nanowires (called heterostructures) and ZnO/ZnO, SnO2/SnO2 nanowires (called homostructures) were synthesised. The fabricated grafted nanowires were examined by field-emission scanning electron microscope and their compositions were analyzed by energy dispersive spectroscopy and X-ray diffraction analysis. The test results indicate that this type of nanostructure material is very promising for NO2 gas sensing at ppt level at room temperature. Among the fabricated structures the SnO2/ZnO nanowires showed the best sensing performance with the high sensitivity and fast response and recovery time. We also discussed the gas sensing mechanism of the fabricated sensors based on the band diagram.
Ämnesord
- NATURVETENSKAP -- Kemi -- Materialkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Materials Chemistry (hsv//eng)
Nyckelord
- Grafted nanowires
- SnO2
- ZnO heterojunction
- Room temperature gas sensor
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- art (ämneskategori)
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