Dataset for Solution-Processed Diode-like ZnO Nanoparticle device with tunable threshold voltage and Super-Nernstian Ion sensitivity
Dataset for Solution-Processed Diode-like ZnO Nanoparticle device with tunable threshold voltage and Super-Nernstian Ion sensitivity
This study introduces a fabrication method to produce a zinc oxide nanoparticles (ZnO NPs) diode-like interface device for sensing applications. This structure is achieved via the modulation of ionized oxygen molecules adsorbed on the surfaces of the ZnO NPs, distinguishing it from the conventional diode devices. The device exhibits an on/off ratio of 105 and features a tunable threshold voltage contingent upon varying surface charge conditions, positioning it as a promising candidate for high-sensitivity chip-level pH sensing applications. A highly sensitive pH sensor based on this interface was successfully fabricated using a fully solution-based process, excluding any high-temperature steps. As the pH value of the test solution decreases, the sensor demonstrates an increase in threshold voltage, achieving a super-Nernstian sensitivity of 360 ± 11 mV/pH. The fabrication process reaches a maximum temperature of 120°C and employs a UV-vacuum-heating (UVVH) technique. To maintain the electrical integrity of ZnO NPs, ethylene-vinyl alcohol (EVOH) is utilized to provide a protective, waterproof and oxygen-barrier passivation layer. The operational behaviour and diode-like characteristics of the sensor, attributed to ionized oxygen molecule adsorption on ZnO NPs, are accurately predicted using a combined adsorption isotherm and electrical model, aligning well with experimental results.
University of Southampton
Qu, Mengyang
111ae526-7a41-4ec2-96ac-f04e29a00c99
Qu, Mengyang
111ae526-7a41-4ec2-96ac-f04e29a00c99
Qu, Mengyang
(2025)
Dataset for Solution-Processed Diode-like ZnO Nanoparticle device with tunable threshold voltage and Super-Nernstian Ion sensitivity.
University of Southampton
doi:10.5258/SOTON/D3538
[Dataset]
Abstract
This study introduces a fabrication method to produce a zinc oxide nanoparticles (ZnO NPs) diode-like interface device for sensing applications. This structure is achieved via the modulation of ionized oxygen molecules adsorbed on the surfaces of the ZnO NPs, distinguishing it from the conventional diode devices. The device exhibits an on/off ratio of 105 and features a tunable threshold voltage contingent upon varying surface charge conditions, positioning it as a promising candidate for high-sensitivity chip-level pH sensing applications. A highly sensitive pH sensor based on this interface was successfully fabricated using a fully solution-based process, excluding any high-temperature steps. As the pH value of the test solution decreases, the sensor demonstrates an increase in threshold voltage, achieving a super-Nernstian sensitivity of 360 ± 11 mV/pH. The fabrication process reaches a maximum temperature of 120°C and employs a UV-vacuum-heating (UVVH) technique. To maintain the electrical integrity of ZnO NPs, ethylene-vinyl alcohol (EVOH) is utilized to provide a protective, waterproof and oxygen-barrier passivation layer. The operational behaviour and diode-like characteristics of the sensor, attributed to ionized oxygen molecule adsorption on ZnO NPs, are accurately predicted using a combined adsorption isotherm and electrical model, aligning well with experimental results.
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data_Small.xlsx
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README.txt
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Published date: 2025
Identifiers
Local EPrints ID: 501820
URI: http://eprints.soton.ac.uk/id/eprint/501820
PURE UUID: afee0813-fe61-4975-ad6a-7d397565205c
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Date deposited: 10 Jun 2025 16:55
Last modified: 17 Jun 2025 02:03
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Creator:
Mengyang Qu
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