Tailoring the degradation rate of magnesium through biomedical nano-porous titanate coatings

Wadge, Matthew D.; McGuire, Jamie; Hanby, Benjamin V.T.; Felfel, Reda M.; Ahmed, Ifty; Grant, David M.

doi:10.1016/j.jma.2020.07.001

Cited by 16 publications

(11 citation statements)

References 59 publications

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“…Typically, associated peak positions of the 2p3/2 peak for these states are ≈453.9, 455.3, 457.1, and 458.5 eV, however, some variance (±0.2–0.4 eV) can be seen from the literature. [ 9,51–53 ] Potentially, a shift to lower eV of the 4+ state may indicate a shift from anatase ( ≈ 458.6 eV) to rutile ( ≈ 458.5 eV), however, this may be within error due to the use of adventitious C as described by Biesinger et al [ 51 ]…”

Section: Resultsmentioning

confidence: 99%

“…Typically, associated peak positions of the 2p3/2 peak for these states are ≈453.9, 455.3, 457.1, and 458.5 eV, however, some variance (±0.2-0.4 eV) can be seen from the literature. [9,[51][52][53] Potentially, a shift to lower eV of the 4+ state may indicate a shift from anatase (≈458.6 eV) to rutile (≈458.5 eV), however, this may be within error due to the use of adventitious C as described by Biesinger et al [51] EDX measurements (Table 2 and Figure 7) detailed significant differences between the Ti6_MS, Ti6_TC, and Ti6_TC_HT samples. The native Ti6_MS powder, as expected, only contained Ti, Al and V at ≈86.5 (90.1), 9.8 (5.8), and 3.7 (4.1) at% (wt%), respectively.…”

Section: Crystalline Structural and Chemical Characterizationmentioning

confidence: 99%

“…[ 3,4 ] Despite its high band gap ( E bg = 3.2 eV [ 5 ] ), and other favorable electronic properties such as stability in electrochemical environments, [ 6,7 ] significant enhancement of these properties are needed to address the diverse challenges posed. Alkaline titanate structures have been of particular interest in a number of sectors, such as biomaterials [ 8–10 ] and energy storage, [ 11,12 ] due to their capability of apatite formation in vitro and in vivo, as well as large ion‐exchange capacity, fast ion diffusion and intercalation, and high surface charge density, as described by Zhang et al [ 13 ] These properties are a direct result of the crystal structure of titanate materials, whereby exchangeable cations sit in the interlayer between negatively charged 2D Ti‐containing sheets. [ 14 ]…”

Section: Introductionmentioning

confidence: 99%

“…[14] An advantage of wet-chemically converted titanates, as compared to those prepared through sintering, is the ability to generate unique nanoporous structures into the film structure. [8,9,15] Recent work highlighted the ability to generate such nanoporous titanate structures onto Ti6Al4V microspheres, broadening their applicability. [16] While studies have assessed the usage of hydrogen titanate nanotubes [17,18] for improved electron conductivity to aid catalytic performance of Pt-based catalysts, nanoporous titanate films without the formation of nanotubular structures, have not been fully investigated in this regard.…”

Section: Introductionmentioning

confidence: 99%

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Nanostructured, Alkaline Titanate‐Converted, and Heat‐Treated Ti6Al4V Microspheres via Wet‐Chemical Alkaline Modification and their ORR Electrocatalytic Response

Wadge

Bird

Sankowski

et al. 2022

Adv Materials Inter

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This study describes the chemical conversion and heat treatment of Ti6Al4V microspheres (Ti6_MS), and the resulting effects on their electrocatalytic properties. The wet‐chemical conversion (5.0 m NaOH, 60 °C, 24 h; Sample label: Ti6_TC) converts the top surface of the Ti6_MS powder into an ≈820 nm thick sodium titanate surface. Heat‐treatment (Ti6_TC_HT) at 450 °C increases the stability of the surface, through partial titanate crystallization, while mitigating excess rutile formation. All samples are analyzed chemically (XPS, EDX, Raman, EELS), structurally (XRD and TEM), and morphologically (SEM, TEM), demonstrating the characteristic formation of sodium titanate dendritic structures, with minimal chemical, structural, and morphological differences due to the 450 °C heat‐treatment. The effect of the preparation methodology on oxygen reduction reaction (ORR) electrocatalytic performance is also tested. The introduction of the sodium titanate layer changes the mechanism of the ORR, from a mixed 4 electron/2 electron pathway to a predominantly 2‐electron pathway. By maintaining the microspherical nature of the material while also tuning the surface of the material toward different reaction mechanisms, a design strategy for new electrocatalyst materials is explored.

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Section: Resultsmentioning

confidence: 99%

Section: Crystalline Structural and Chemical Characterizationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Nanostructured, Alkaline Titanate‐Converted, and Heat‐Treated Ti6Al4V Microspheres via Wet‐Chemical Alkaline Modification and their ORR Electrocatalytic Response

Wadge

Bird

Sankowski

et al. 2022

Adv Materials Inter

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“…After 21 days, the results indicated that the corrosion rate of samples immersed in EBSS buffered with sodium bicarbonate was similar to that obtained in vivo. In addition to EBSS, cell culture media, such as DMEM and MEM, are preferable to investigate the corrosion behavior of Mg-based biomaterials [88][89][90].…”

Section: Mg Corrosion In Simulated Body Environmentsmentioning

confidence: 99%

Biodegradable Magnesium Biomaterials—Road to the Clinic

Amukarimi

Mozafari

2022

Bioengineering

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In recent decades, we have witnessed radical changes in the use of permanent biomaterials. The intrinsic ability of magnesium (Mg) and its alloys to degrade without releasing toxic degradation products has led to a vast range of applications in the biomedical field, including cardiovascular stents, musculoskeletal, and orthopedic applications. With the use of biodegradable Mg biomaterials, patients would not suffer second surgery and surgical pain anymore. Be that as it may, the main drawbacks of these biomaterials are the high corrosion rate and unexpected degradation in physiological environments. Since biodegradable Mg-based implants are expected to show controllable degradation and match the requirements of specific applications, various techniques, such as designing a magnesium alloy and modifying the surface characteristics, are employed to tailor the degradation rate. In this paper, some fundamentals and particular aspects of magnesium degradation in physiological environments are summarized, and approaches to control the degradation behavior of Mg-based biomaterials are presented.

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Comparative study of calcium phosphate formation on sol-gel and solid-state synthesized calcium titanate surfaces

Abbasloo,

Mozammel,

Roghani-Mamaqani

et al. 2024

J Sol-Gel Sci Technol

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Tailoring the degradation rate of magnesium through biomedical nano-porous titanate coatings

Cited by 16 publications

References 59 publications

Nanostructured, Alkaline Titanate‐Converted, and Heat‐Treated Ti6Al4V Microspheres via Wet‐Chemical Alkaline Modification and their ORR Electrocatalytic Response

Nanostructured, Alkaline Titanate‐Converted, and Heat‐Treated Ti6Al4V Microspheres via Wet‐Chemical Alkaline Modification and their ORR Electrocatalytic Response

Biodegradable Magnesium Biomaterials—Road to the Clinic

Comparative study of calcium phosphate formation on sol-gel and solid-state synthesized calcium titanate surfaces

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