READ ME File For 'Dataset supporting the thesis "Fully Solution Processed Method to Fabricate ZnO Nanoparticles Devices for Sensing Application"'

Dataset DOI: 

Date that the file was created: 06, 2025

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GENERAL INFORMATION
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ReadMe Author: Mengyang Qu, University of Southampton 

Date of data collection: 01 2022- 02 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 thesis: Fully Solution Processed Method to Fabricate ZnO Nanoparticles Devices for Sensing Application
AUTHORS:Mengyang Qu
TITLE:Fully Solution Processed Method to Fabricate ZnO Nanoparticles Devices for Sensing Application

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 4.2 a) The resistance of interdigitated device without any passivation obtained after different UV-vacuum-heating times. The samples were exposed to the 365 nm wavelength UV and heated to 190 °C in 10-2 mbar vacuum condition. 
Figure 4.3 Measured time dependent sheet resistance changes. The sheet resistance is calculated from the measured resistance of the device to its W/L ratio (See Figure S2e). The lines joining the dots are only for eye guide. 
Figure 4.12 Measured O 1s XPS spectra of ZnO NP film, a) with EVOH passivation and UV-vacuum-heat process b) without the passivation and the UV-vacuum-heat process.


Figure 5.3. 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 5.5. 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 5.10.  a) The intrinsic diode-like behaviour of the LR-HR ZnO NPs interface with a solid carbon electrode 
Figure 5.13 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.