Synthesis and Characterization of Nanocoatings Thin films by Atomic Layer Deposition for Medical Applications

Wadullah, Haitham M.; Ajeel, Sami A.; Abbass, Muna Khethier

doi:10.1088/1757-899x/518/3/032057

Cited by 7 publications

(7 citation statements)

References 5 publications

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“…The increased roughness observed in the DLC/TiO2-film samples on the AISI 316L substrate may be attributable to several factors influencing the deposition process. Variations in deposition conditions, such as temperature, pressure, and precursor concentrations, can lead to non-uniform growth of the TiO 2 layer, resulting in surface irregularities [50][51][52][53]. Additionally, interactions between the TiO 2 molecules and the substrate surface may contribute to the formation of rough surface features during the nucleation and growth stages [51,52].…”

Section: Film Thickness and Roughness Measurementsmentioning

confidence: 99%

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Enhancing UV Radiation Resilience of DLC-Coated Stainless Steel with TiO2: A Dual-Layer Approach

Macário,

da Silveira,

Vieira

et al. 2024

Coatings

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This study presents an innovative dual-layer coating approach integrating titanium dioxide (TiO2) onto diamond-like carbon (DLC)-coated 316L stainless steel. The combination of PECVD-deposited DLC and ALD-deposited TiO2 aims to preserve the inherent tribological properties of DLC while mitigating UV-induced degradation. By leveraging the ability of TiO2 to absorb, reflect, and scatter UV light, this dual-layer strategy significantly enhances the durability of DLC coatings in radiation-prone environments. The effects of accelerated aging through UV exposure on DLC and DLC/TiO2 films were evaluated using an Accelerated Weathering Tester. Comprehensive analyses were conducted to assess the structural and mechanical properties before and after UV exposure, including Raman spectroscopy, profilometry, SEM, EDS, nanoindentation, and tribometry. The results demonstrate that the TiO2 layer effectively mitigates UV-induced damage, preserving the DLC film’s integrity and tribological performance even after 408 h of UV aging. Specifically, the DLC/TiO2 coatings maintained lower roughness, higher hardness, and better adhesion than DLC-only coatings under identical conditions. This research significantly advances protective coating technology by enhancing the durability and performance of DLC films, particularly in aerospace and other demanding industries where exposure to UV radiation is a critical concern.

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Section: Film Thickness and Roughness Measurementsmentioning

confidence: 99%

“…concentrations, can lead to non-uniform growth of the TiO2 layer, resulting in surface irregularities [50][51][52][53]. Additionally, interactions between the TiO2 molecules and the substrate surface may contribute to the formation of rough surface features during the nucleation and growth stages [51,52].…”

Section: Film Thickness and Roughness Measurementsmentioning

confidence: 99%

Enhancing UV Radiation Resilience of DLC-Coated Stainless Steel with TiO2: A Dual-Layer Approach

Macário,

da Silveira,

Vieira

et al. 2024

Coatings

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“…These excitons react at the surface of TiO2 with surrounding water molecules to form reactive species such as hydroxyl (•OH) and superoxide (•O2−) radicals, capable of mineralizing a wide range of organic compounds [3], acting as a photocatalyst material. There have been several papers reporting the disinfection of bacteria, viruses, and other pathogens by photoactive titania [4] [5][6] [7].…”

Section: Introductionmentioning

confidence: 99%

“…The present work describes a parametric study of TiO2 deposition on 304 and 316L stainless steel (SS) substrates via atomic layer deposition (ALD). The atomic layer deposition is an advantageous technique that guarantees the control of the TiO2 film thickness according to the number of deposition cycles that no other deposition technique provides [7] [23]. The TiO2 films were compared after deposition on 304 and 316L substrates to evaluate the film's structure, adhesion, and composition phases (rutile, anatase, and brookite) according to different stainless steel compositions.…”

Section: Introductionmentioning

confidence: 99%

Heterostructure, Morphology, and Adherence Evaluation of TiO<sub>2</sub> Film Deposited on Stainless Steel 304 and 316L via Atomic Layer Deposition

Marques¹,

Manfroi²,

Vieira³

et al. 2023

Preprint

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Titanium dioxide (TiO2) thin films have been widely used in transparent optoelectronic devices owing to their excellent optical properties also is used in photocatalysis, cosmetics, and many other biomedical applications. However, a lack of studies was published on microstructure and adherence comparison of the TiO2 deposited on both AISI substrates. In this work, TiO2 thin films were deposited onto AISI 304 and AISI 316L stainless steel (SS) substrates via atomic layer deposition. Its heterostructure, morphology, and adhesion were compared in both substrates looking for synergistic and multifunctional properties. Raman spectroscopy mapping and X-ray diffraction using the Rietveld refinement method showed that the films are composed of anatase and rutile phases in different percentages. Scratching tests were used to analyze the film adher-ence and friction between a diamond tip and TiO2 film, showing well adhered in both substrates.

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“…thin film with defect-free, and improved localized electrochemical corrosion resistance on artificial saliva at 37 °C. Wadullah et al 5 used the Atomic Layer Deposition (ALD) technique to describe the deposition of 25nm and 50nm thin films of Alumina, Titania, and Alumina/ Titania multilayer thin films on Co-Cr alloy (ASTM F75). The results showed homogeneous thin films with no defects or micro cracks.…”

Section: Introductionmentioning

confidence: 99%

Structure, Characteristics and Corrosion Behaviour of Gold Nanocoating Thin Film for Biomedical Applications

2022

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Nanocoatings thin films are layers deposited to improve required properties and corrosion resistance as a major objective for materials that are used for various biomedical applications such as biosensors. In this study, Gold (Au) thin films with 50 nm and 100 nm have been synthesized on Ni-Cr-Mo alloys by magnetron sputtering deposition technique. X-Ray diffraction (XRD), Atomic Force Microscopy (AFM), and Energy-dispersive X-Ray spectroscopy /Scanning Electron Microscopy (EDS/SEM ) have been used to distinguish the surfaces morphology. The results showed that there is no defects or micro-cracks with a uniform and homogenous film. It has spherical nanoparticles diameter morphology with 200-400 nm shaped to fine aggregation. The roughness average (Ra) decreased from 3.91 nm for 50 nm films to 3.70 nm for 100nm films with FCC crystal structure (111) for gold thin films. In vivo, after 50 nm and 100 nm nanocoated thin film by gold, a significant improvement in the localized corrosion resistance has been obtained in artificial saliva corrosive media at 37 °C compared with the uncoated surface.

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Synthesis and Characterization of Nanocoatings Thin films by Atomic Layer Deposition for Medical Applications

Cited by 7 publications

References 5 publications

Enhancing UV Radiation Resilience of DLC-Coated Stainless Steel with TiO2: A Dual-Layer Approach

Enhancing UV Radiation Resilience of DLC-Coated Stainless Steel with TiO2: A Dual-Layer Approach

Heterostructure, Morphology, and Adherence Evaluation of TiO<sub>2</sub> Film Deposited on Stainless Steel 304 and 316L via Atomic Layer Deposition

Structure, Characteristics and Corrosion Behaviour of Gold Nanocoating Thin Film for Biomedical Applications

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