Reaction of CH<sub>3</sub>CH<sub>2</sub>OH and H on a ZnO Single Crystal Surface

Motin, Md. Abdul; Sadiq, Muhammad; Kim, Chang Min

doi:10.1002/bkcs.11890

Cited by 3 publications

(1 citation statement)

References 17 publications

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“…The reaction pathways including the above equations have been discussed by observing the reaction product using, for example, gas chromatography-related techniques 5 and the surface-sensitive temperature-programmed desorption (TPD). 6 − 9 Although EtOH sensing by ZnO is one of the most intensively studied target gas—sensing material combinations from both experimental and theoretical approaches, 4 , 5 , 10 − 23 the central working mechanism of the gas sensing remains controversial.…”

Section: Introductionmentioning

confidence: 99%

Ethanol Gas Sensing by a Zn-Terminated ZnO(0001) Bulk Single-Crystalline Substrate

et al. 2020

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Metal oxide semiconductor gas sensors have been widely studied for the selective detection of various gases with trace concentrations. The identification of the reaction scheme governing the gas sensing response is crucial for further development; however, the mechanism of ethanol (EtOH) gas sensing by ZnO is still controversial despite being one of the most intensively studied target gas and sensing material combinations. In this work, for the first time, the detailed mechanism of EtOH sensing by ZnO is studied by using a bulk single-crystalline substrate, which has a well-defined stoichiometry and atomic arrangement, as the sensing material. The sensing response is substantial on the ZnO substrate even with a millimeter-size thickness, and it becomes larger with resistance of the substrate. The large sensing response is described in terms of the adsorption/desorption of the oxygen species on the substrate surface, namely, oxygen ionosorption. The valence state of the ionosorbed oxygen involved in EtOH sensing is identified to be O 2– regardless of the temperature. The increase in the sensing response with the temperature is attributed to the enhanced oxidation rate of the EtOH molecule on the surface as analyzed by pulsed-jet temperature-programmed desorption mass spectrometry, which has been newly developed for analyzing surface reactions in simulated working conditions.

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Section: Introductionmentioning

confidence: 99%

Ethanol Gas Sensing by a Zn-Terminated ZnO(0001) Bulk Single-Crystalline Substrate

et al. 2020

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He+ LEIS analysis combined with pulsed jet technique of ethanol sensing by a ZnO surface

Suzuki

Adachi

Ohgaki

et al. 2021

Applied Surface Science

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Electrical resistance response of a ZnO single-crystalline substrate to trace ethanol under pulsed air jet irradiation

Suzuki

Adachi

Ohgaki

et al. 2020

Vacuum

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Reaction of CH₃CH₂OH and H on a ZnO Single Crystal Surface

Cited by 3 publications

References 17 publications

Ethanol Gas Sensing by a Zn-Terminated ZnO(0001) Bulk Single-Crystalline Substrate

Ethanol Gas Sensing by a Zn-Terminated ZnO(0001) Bulk Single-Crystalline Substrate

He+ LEIS analysis combined with pulsed jet technique of ethanol sensing by a ZnO surface

Electrical resistance response of a ZnO single-crystalline substrate to trace ethanol under pulsed air jet irradiation

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Reaction of CH3CH2OH and H on a ZnO Single Crystal Surface

Cited by 3 publications

References 17 publications

Ethanol Gas Sensing by a Zn-Terminated ZnO(0001) Bulk Single-Crystalline Substrate

Ethanol Gas Sensing by a Zn-Terminated ZnO(0001) Bulk Single-Crystalline Substrate

He+ LEIS analysis combined with pulsed jet technique of ethanol sensing by a ZnO surface

Electrical resistance response of a ZnO single-crystalline substrate to trace ethanol under pulsed air jet irradiation

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Reaction of CH₃CH₂OH and H on a ZnO Single Crystal Surface