The porous nature of ZnO thin films deposited by sol–gel Spin-Coating technique

Karyaoui, M.; Jaballah, A. Ben; Mechiak, R; Chtourou, R.

doi:10.1088/1757-899x/28/1/012019

Cited by 6 publications

(4 citation statements)

References 25 publications

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“…Consequently the diffusion, reflection and the optical absorption of light in the film would increase. So the film would be less transparent [28].…”

Section: Discussion About the Porosity And Density Of Zno Layersmentioning

confidence: 99%

Deposition of ZnO thin films from aqueous solution in a low power plasma reactor

Ma¹,

Rousseau²,

Donsanti³

et al. 2015

Surface and Coatings Technology

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“…Consequently the diffusion, reflection and the optical absorption of light in the film would increase. So the film would be less transparent [28].…”

Section: Discussion About the Porosity And Density Of Zno Layersmentioning

confidence: 99%

Deposition of ZnO thin films from aqueous solution in a low power plasma reactor

Ma¹,

Rousseau²,

Donsanti³

et al. 2015

Surface and Coatings Technology

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“…2b coalesced into a continuous film of crystalline ZnO characterized by a significant residual porosity. 44 Such porosity played a fundamental role on the gas permeability of the layer, hence strongly influencing sensing performances. 45 Before loading the precursor into the cartridge, its printability was evaluated.…”

Section: Resultsmentioning

confidence: 99%

Inkjet Printed ZnO Sensors for Early Prostate Cancer Detection by Means of Urine Odor Analysis

Bax

Bernasconi

Massironi

et al. 2021

J. Electrochem. Soc.

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In the second half of the 20th century, inkjet printing has rapidly evolved from a mere digital image reproduction technique into a highly versatile materials deposition technology. Recently, inkjet production of metal oxide-based gas sensors (MOS) has emerged, and inkjet sensors have been proposed for different applications. In this context, this paper proposes the adoption of inkjet MOS sensors for urine analysis for the purpose of developing an innovative tool for the early prostate cancer (KP) diagnosis. Based on the results reported in the scientific literature, proving the correlation between urine color and odor alterations and cancer, the study focuses on the analysis by means of MOS sensor array of odors emanated from urine samples from prostate cancer patients versus healthy donors. The results achieved in terms of diagnostic accuracy, sensitivity, and specificity (i.e., about 80%) proved the potentialities of inkjet MOS sensor for the challenging purpose of detection of prostate cancer in its early stages. Resulting significantly more powerful than current KP diagnostic protocol, the approach here presented might become, after validation, a rapid, non-invasive and low-cost screening tool, capable to provide a solution to the problems of patients’ overtreatment and high health spending associated to procedures currently adopted.

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“…Sputtering, Molecular Beam Epitaxy (MBE), Pulse Laser Deposition (PLD), and Metal-Organic Chemical Vapor Deposition (MOCVD) are considered as complicated and expensive methods, which involve sophisticated experimental apparatus and specific conditions [27][28][29][30][31][32]. Soft chemistry methods such as spray pyrolysis, dip-and spin-coating, and electrodeposition are regarded as relatively easy and inexpensive techniques [33][34][35][36][37].…”

Section: Introductionmentioning

confidence: 99%

Electroplating of hydrophobic/hydrophilic ZnO nano-structural coatings on metallic substrates

Belamri,

Boumaza,

Boudjadar

2023

Phys. Scr.

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In the present work, ZnO thin film is shown as a coating on an aluminum substrate. In order to synthesize ZnO thin films, electroplated Zn thin layers were thermally oxidized in atmospheric air for different times (1h–4h) at a fixed annealing temperature of 500 °C. The samples were characterized by scanning electron microscopy (FEG-SEM) equipped with energy dispersive x-ray analysis (EDX), a profilometer, x-ray diffraction (XRD), and Raman spectroscopy. The wettability properties of the synthesized films were evaluated by measuring the contact angle between the surface of the films and a deposited water drop (WCA). The FEG-SEM images show that the surface morphologies change throughout treatment time. The sample treated for 2 h shows flower-like microstructures with an average size of 100 μm, which are covered with spherical ZnO nanostructures with a size less than 50 nm. Measured surface roughness ranges from 5.800 μm to 6.560 μm. Layers thicknesses vary between 31 and 38 μm. Structural characterization by XRD demonstrates that the synthesized ZnO thin films were polycrystalline and have Wurtzite hexagonal structures, grown manly along the (101) plan. The estimated crystallite sizes are in the nanometric scale and reach their maximum value for the sample treated for 2 h. This annealing time corresponds to the low dislocation density (δ) and low lattice strain (ε), indicating fewer defects. The Raman analysis shows five normal vibrational modes, which correspond to the ZnO Wurtzite structure. It was possible to obtain both hydrophobic and hydrophilic surfaces; the shape and surface roughness of the as-prepared films had an impact on the results. The largest measured contact angle, of 97°, was obtained after annealing for 2 h at 500 °C.

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The porous nature of ZnO thin films deposited by sol–gel Spin-Coating technique

Cited by 6 publications

References 25 publications

Deposition of ZnO thin films from aqueous solution in a low power plasma reactor

Deposition of ZnO thin films from aqueous solution in a low power plasma reactor

Inkjet Printed ZnO Sensors for Early Prostate Cancer Detection by Means of Urine Odor Analysis

Electroplating of hydrophobic/hydrophilic ZnO nano-structural coatings on metallic substrates

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