Large-sized α-MoO3 layered single crystals for superior NO2 gas sensing

Wei Li; Qingdong Ou; Xiaodong Wang; Kaijian Xing; Tuquabo Tesfamichael; Nunzio Motta; Dong Chen Qi

doi:10.1016/j.apsusc.2022.152793

Large-sized α-MoO₃ layered single crystals for superior NO₂ gas sensing

Wei Li, Qingdong Ou, Xiaodong Wang, Kaijian Xing, Tuquabo Tesfamichael, Nunzio Motta, Dong Chen Qi

Research output: Contribution to journal › Article › Research › peer-review

20 Citations (Scopus)

Abstract

Molybdenum trioxide (MoO₃) has attracted considerable research interest due to its unique structural and electronic properties. Herein, we report a monolithic and scalable NO₂ gas sensor based on centimeter-sized single-crystalline α-MoO₃ synthesized via vapor phase transport method. A combination of advanced characterization probes were utilized to study morphology, composition and crystalline structures of the as-synthesized crystals. At the optimal operating temperature of 100 °C, the centimeter-sized α-MoO₃ single crystal based sensor shows an outstanding sensitivity towards NO₂ with a limit of detection as low as 5 ppb, as well as superior selectivity and reversibility. The scalability and the intrinsic sensing response are further demonstrated by microscale sensor devices fabricated on individual exfoliated α-MoO₃ nanoribbons. Our study presents promising opportunities to develop a high-performance gas sensing platform based on crystalline α-MoO₃ to enable monolithic, scalable and integrable sensing technologies.

Original language	English
Article number	152793
Number of pages	12
Journal	Applied Surface Science
Volume	586
DOIs	https://doi.org/10.1016/j.apsusc.2022.152793
Publication status	Published - 1 Jun 2022

Keywords

Centimeter-sized
Gas sensor
Integrable
Molybdenum trioxide
Nitrogen dioxide
Single crystalline
Ultrasensitive

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10.1016/j.apsusc.2022.152793

Cite this

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title = "Large-sized α-MoO3 layered single crystals for superior NO2 gas sensing",

abstract = "Molybdenum trioxide (MoO3) has attracted considerable research interest due to its unique structural and electronic properties. Herein, we report a monolithic and scalable NO2 gas sensor based on centimeter-sized single-crystalline α-MoO3 synthesized via vapor phase transport method. A combination of advanced characterization probes were utilized to study morphology, composition and crystalline structures of the as-synthesized crystals. At the optimal operating temperature of 100 °C, the centimeter-sized α-MoO3 single crystal based sensor shows an outstanding sensitivity towards NO2 with a limit of detection as low as 5 ppb, as well as superior selectivity and reversibility. The scalability and the intrinsic sensing response are further demonstrated by microscale sensor devices fabricated on individual exfoliated α-MoO3 nanoribbons. Our study presents promising opportunities to develop a high-performance gas sensing platform based on crystalline α-MoO3 to enable monolithic, scalable and integrable sensing technologies.",

keywords = "Centimeter-sized, Gas sensor, Integrable, Molybdenum trioxide, Nitrogen dioxide, Single crystalline, Ultrasensitive",

author = "Wei Li and Qingdong Ou and Xiaodong Wang and Kaijian Xing and Tuquabo Tesfamichael and Nunzio Motta and Qi, {Dong Chen}",

note = "Publisher Copyright: {\textcopyright} 2022 Elsevier B.V.",

year = "2022",

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doi = "10.1016/j.apsusc.2022.152793",

language = "English",

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journal = "Applied Surface Science",

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T1 - Large-sized α-MoO3 layered single crystals for superior NO2 gas sensing

AU - Li, Wei

AU - Ou, Qingdong

AU - Wang, Xiaodong

AU - Xing, Kaijian

AU - Tesfamichael, Tuquabo

AU - Motta, Nunzio

AU - Qi, Dong Chen

PY - 2022/6/1

Y1 - 2022/6/1

N2 - Molybdenum trioxide (MoO3) has attracted considerable research interest due to its unique structural and electronic properties. Herein, we report a monolithic and scalable NO2 gas sensor based on centimeter-sized single-crystalline α-MoO3 synthesized via vapor phase transport method. A combination of advanced characterization probes were utilized to study morphology, composition and crystalline structures of the as-synthesized crystals. At the optimal operating temperature of 100 °C, the centimeter-sized α-MoO3 single crystal based sensor shows an outstanding sensitivity towards NO2 with a limit of detection as low as 5 ppb, as well as superior selectivity and reversibility. The scalability and the intrinsic sensing response are further demonstrated by microscale sensor devices fabricated on individual exfoliated α-MoO3 nanoribbons. Our study presents promising opportunities to develop a high-performance gas sensing platform based on crystalline α-MoO3 to enable monolithic, scalable and integrable sensing technologies.

AB - Molybdenum trioxide (MoO3) has attracted considerable research interest due to its unique structural and electronic properties. Herein, we report a monolithic and scalable NO2 gas sensor based on centimeter-sized single-crystalline α-MoO3 synthesized via vapor phase transport method. A combination of advanced characterization probes were utilized to study morphology, composition and crystalline structures of the as-synthesized crystals. At the optimal operating temperature of 100 °C, the centimeter-sized α-MoO3 single crystal based sensor shows an outstanding sensitivity towards NO2 with a limit of detection as low as 5 ppb, as well as superior selectivity and reversibility. The scalability and the intrinsic sensing response are further demonstrated by microscale sensor devices fabricated on individual exfoliated α-MoO3 nanoribbons. Our study presents promising opportunities to develop a high-performance gas sensing platform based on crystalline α-MoO3 to enable monolithic, scalable and integrable sensing technologies.

KW - Centimeter-sized

KW - Gas sensor

KW - Integrable

KW - Molybdenum trioxide

KW - Nitrogen dioxide

KW - Single crystalline

KW - Ultrasensitive

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U2 - 10.1016/j.apsusc.2022.152793

DO - 10.1016/j.apsusc.2022.152793

M3 - Article

AN - SCOPUS:85124593435

SN - 0169-4332

VL - 586

JO - Applied Surface Science

JF - Applied Surface Science

M1 - 152793

ER -

Large-sized α-MoO₃ layered single crystals for superior NO₂ gas sensing

Abstract

Keywords

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Engineering twisted two-dimensional materials for mid-infrared detectors

ARC Centre of Excellence in Future Low-energy Electronics Technologies

Cite this

Large-sized α-MoO3 layered single crystals for superior NO2 gas sensing

Abstract

Keywords

Access to Document

Other files and links

Projects

Engineering twisted two-dimensional materials for mid-infrared detectors

ARC Centre of Excellence in Future Low-energy Electronics Technologies

Cite this

Large-sized α-MoO₃ layered single crystals for superior NO₂ gas sensing