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

Dataset DOI: https://doi.org/10.5258/SOTON/D3569

Date that the file was created: 06, 2025

-------------------
GENERAL INFORMATION
-------------------

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

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

Links to related data sets: 

Qu, Mengyang (2024) Dataset supporting the publication "Solution-Processed Low Resistivity Zinc Oxide Nanoparticle Film with Enhanced Stability using EVOH". University of Southampton doi:10.5258/SOTON/D3069 [Dataset]

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] 

--------------------------
SHARING/ACCESS INFORMATION
-------------------------- 

License: CC BY

Recommended citation for the data:
Qu, Mengyang (2025) Dataset supporting the thesis "Fully Solution Processed Method to Fabricate ZnO Nanoparticles Devices for Sensing Application". University of Southampton doi:10.5258/SOTON/D3569 [Dataset] 

--------------------
DATA & FILE OVERVIEW
--------------------

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.