Effect of ion bombardment on the chemical properties of crystalline tantalum pentoxide films

Pérez, Israel; Sosa, Vı́ctor; Perera, Fidel Gamboa; Galindo, José Trinidad Elizalde; Enríquez-Carrejo, José L.; Mani-González, P.G.

doi:10.1016/j.vacuum.2019.04.037

Cited by 17 publications

(3 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…High-resolution XPS spectra of Ta 4f peaks for non-anodized and anodized samples are displayed in Figure . All peaks observed for XPS spectra of non-anodized and anodized samples were in line with literature findings. − For the non-anodized tantalum, two peaks appeared at 21.9 and 23.8 eV, which belonged to Ta 4f 7/2 and Ta 4f 5/2 peaks of metallic tantalum, respectively (Figure a). For NT-min and NT-max samples (Figure b,c), aside from the metallic tantalum peaks, peaks at 29.4 eV for Ta 4f 5/2 and 27.5 eV for Ta 4f 7/2 were also observed.…”

Section: Results and Discussionsupporting

confidence: 88%

Nanofeature Size and Morphology of Tantalum Oxide Surfaces Control Osteoblast Functions

Uslu

Mimiroglu

Ercan

2021

ACS Appl. Bio Mater.

View full text Add to dashboard Cite

Tantalum is one of the most corrosion-resistant materials and has mechanical properties that are suitable for orthopedic applications. However, tantalum exhibits bioinert characteristics and cannot promote the desired level of osseointegration with juxtaposed bone tissues. To enhance the bioactivity of tantalum, nanoscale surface modifications via anodization could be a potential approach. In this study, surface features having nanotubular, nanodimple, and nanocoral morphologies were fabricated onto tantalum by controlling anodization parameters. Aside from altering the surface morphology, nanotubular, nanodimple, and nanocoral feature sizes were precisely fine-tuned between the 20 and 140 nm range. The results indicated that anodized surfaces consisted of Ta2O5 and non-stoichiometric tantalum suboxide chemistry. Upon the anodization, surface area of the tantalum samples increased up to 2-fold, which was accompanied by up to a 3.5-folds increase in the nanophase surface roughness. Biological studies showed that anodized tantalum surfaces significantly enhanced protein adsorption and improved bone cell proliferation and spreading independently of the anodized surface morphology and feature size. Nanodimple surfaces having a 90 nm feature size promoted 50% more bone cell proliferation and 23% more cellular spreading compared to non-anodized tantalum. Nanodimple surfaces also enhanced alkaline phosphatase activity and increased Ca mineral deposition up to 5 weeks compared to non-anodized tantalum, indicating higher bioactivity. In this study, biological interactions of anodized tantalum surfaces having different morphologies and feature sizes were examined, for the first time, and the potential use of nanostructured tantalum was highlighted for orthopedic applications.

show abstract

Section: Results and Discussionsupporting

confidence: 88%

Nanofeature Size and Morphology of Tantalum Oxide Surfaces Control Osteoblast Functions

Uslu

Mimiroglu

Ercan

2021

ACS Appl. Bio Mater.

View full text Add to dashboard Cite

show abstract

“…These devices are usually fabricated from corrosion-resistant materials, such as stainless steel (316 L), cobalt-chromium (Co-Cr), titanium alloys, platinum-iridium (Pt-Ir) alloys, tantalum (Ta) or nitinol (Ni-Ti) and are permanently implanted (Raab et al , 2020; Fu et al , 2022; Antanasova et al , 2018; Perez et al , 2019; della Valle et al , 2021; Dahiya et al , 2022). Traditional stent manufacturing techniques include etching, micro-electro discharge machining, electroforming, die-casting and laser cutting, as shown in Figure 1 (Wang et al , 2021; McGee et al , 2022).…”

Section: Introductionmentioning

confidence: 99%

3D printing of personalised stents using new advanced photopolymerizable resins and Ti-6Al-4V alloy

Baila,

Sanfilippo,

Savu

et al. 2024

RPJ

View full text Add to dashboard Cite

Purpose The development of new advanced materials, such as photopolymerizable resins for use in stereolithography (SLA) and Ti6Al4V manufacture via selective laser melting (SLM) processes, have gained significant attention in recent years. Their accuracy, multi-material capability and application in novel fields, such as implantology, biomedical, aviation and energy industries, underscore the growing importance of these materials. The purpose of this study is oriented toward the application of new advanced materials in stent manufacturing realized by 3D printing technologies. Design/methodology/approach The methodology for designing personalized medical devices, implies computed tomography (CT) or magnetic resonance (MR) techniques. By realizing segmentation, reverse engineering and deriving a 3D model of a blood vessel, a subsequent stent design is achieved. The tessellation process and 3D printing methods can then be used to produce these parts. In this context, the SLA technology, in close correlation with the new types of developed resins, has brought significant evolution, as demonstrated through the analyses that are realized in the research presented in this study. This study undertakes a comprehensive approach, establishing experimentally the characteristics of two new types of photopolymerizable resins (both undoped and doped with micro-ceramic powders), remarking their great accuracy for 3D modeling in die-casting techniques, especially in the production process of customized stents. Findings A series of analyses were conducted, including scanning electron microscopy, energy-dispersive X-ray spectroscopy, mapping and roughness tests. Additionally, the structural integrity and molecular bonding of these resins were assessed by Fourier-transform infrared spectroscopy–attenuated total reflectance analysis. The research also explored the possibilities of using metallic alloys for producing the stents, comparing the direct manufacturing methods of stents’ struts by SLM technology using Ti6Al4V with stent models made from photopolymerizable resins using SLA. Furthermore, computer-aided engineering (CAE) simulations for two different stent struts were carried out, providing insights into the potential of using these materials and methods for realizing the production of stents. Originality/value This study covers advancements in materials and additive manufacturing methods but also approaches the use of CAE analysis, introducing in this way novel elements to the domain of customized stent manufacturing. The emerging applications of these resins, along with metallic alloys and 3D printing technologies, have brought significant contributions to the biomedical domain, as emphasized in this study. This study concludes by highlighting the current challenges and future research directions in the use of photopolymerizable resins and biocompatible metallic alloys, while also emphasizing the integration of artificial intelligence in the design process of customized stents by taking into consideration the 3D printing technologies that are used for producing these stents.

show abstract

“…Ta 2 O 5 coatings have an excellent biocompatibility, good dielectric properties, and high corrosion resistance [25]. E-gun technology permits corrosion resistance and uniform thin coatings of the angstrom order [26]. In general, physical vapor deposition methods are used for the optical coatings in the field of ophthalmic and precision optical coatings [27].…”

Section: Introductionmentioning

confidence: 99%

Thin Films Deposition of Ta2O5 and ZnO by E-Gun Technology on Co-Cr Alloy Manufactured by Direct Metal Laser Sintering

et al. 2021

View full text Add to dashboard Cite

In recent years in the dental field, new types of materials and techniques for the manufacturing of dental crowns and analog implants have been developed to improve the quality of these products. The objective of this article was to perform the surface characterization and determine the properties of Co-Cr alloy samples fabricated by the direct metal laser sintering (DMLS) process and coated by e-gun technology with thin films of Ta2O5 and ZnO. Both oxides are frequently used for dental products, in pharmacology, cosmetics, and medicine, due to their good anticorrosive, antibacterial, and photo-catalytic properties. Following the deposition of thin oxide films on the Co-Cr samples fabricated by DMLS, a very fine roughness in the order of nanometers was obtained. Thin films deposition was realized to improve the hardness and the roughness of the Co-Cr parts fabricated by the DMLS process. Surface characterization was performed using SEM-EDS, AFM, and XRD. AFM was used to determine the roughness of the samples and the nanoindentation curves were determined to establish the hardness values and modulus of elasticity.

show abstract

Effect of ion bombardment on the chemical properties of crystalline tantalum pentoxide films

Cited by 17 publications

References 52 publications

Nanofeature Size and Morphology of Tantalum Oxide Surfaces Control Osteoblast Functions

Nanofeature Size and Morphology of Tantalum Oxide Surfaces Control Osteoblast Functions

3D printing of personalised stents using new advanced photopolymerizable resins and Ti-6Al-4V alloy

Thin Films Deposition of Ta2O5 and ZnO by E-Gun Technology on Co-Cr Alloy Manufactured by Direct Metal Laser Sintering

Contact Info

Product

Resources

About