READ ME File For 'Dataset supporting the publication "Solution-Processed Diode-like Zinc Oxide Nanoparticle Device with Tunable Threshold Voltage and Super-Nernstian Ion Sensitivity"'

Dataset DOI: 10.5258/SOTON/D3538 

Date that the file was created: 05, 2025

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GENERAL INFORMATION
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ReadMe Author: Mengyang Qu, University of Southampton [https://orcid.org/0009-0003-3685-8658]

Date of data collection: 01 2024- 04 2025

Information about geographic location of data collection: Figure 1,2,3,5.

Related projects:
Royal Academy of Engineering under the Chairs in Emerging Technologies Scheme

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SHARING/ACCESS INFORMATION
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Licenses/restrictions placed on the data, or limitations of reuse:CC BY
Recommended citation for the data:

This dataset supports the publication: Solution-Processed Diode-like Zinc Oxide Nanoparticle Device with Tunable Threshold Voltage and Super-Nernstian Ion Sensitivity
AUTHORS:Mengyang Qu, Huanghao Dai, Omesh Kapur, Stephen Beeby, Harold Chong.
TITLE:Solution-Processed Diode-like Zinc Oxide Nanoparticle Device with Tunable Threshold Voltage and Super-Nernstian Ion Sensitivity
JOURNAL:Small
PAPER DOI IF KNOWN:

Links to other publicly accessible locations of the data:

Links/relationships to ancillary or related data sets: 


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DATA & FILE OVERVIEW
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This dataset contains:

Figure 1. c) I-V measurement of the DI water used for preparing the pH solution on a device with carbon electrodes without ZnO and a device containing carbon electrodes with the ZnO NPs and TiOx and SiO2 layers. Insert shows the SEM cross-section of ZnO NPs with TiOx and SiO2 layers. The film reveals a porous structure that permits water permeation into the ZnO NPs layer.
Figure 2.  a) The intrinsic diode-like behaviour of the LR-HR ZnO NPs interface with a solid carbon electrode 
Figure 3. a) - e) Diode-like pH sensor behaviour for five devices. They all start with measuring pH 9 as the reference and then the target pH level. The threshold voltage increases as the pH level applied to the device decreases. f) One device measures different pH solutions g) The titration curve shows the sensor sensitivity is 360 ± 11 mV/pH.  h) The subthreshold swing of different pH detection. 
Figure 5. a) The time-dependent measurement for the ZnO NPs pH sensor shows a stable character.  The voltage between the electrodes was set at 2.5V. b) The current value from a for each pH measurement at 60th second, and the fitted curve is obtained from the derived equation 9.