Fabrication of metal-dielectric nanocomposites using a table-top ion implanter

Шипилова, О. И.; Gorbunov, S. P.; Paperny, V. L.; Черных, А. А.; Dresvyansky, V. P.; Мартынович, Е. Ф.; Ракевич, А. Л.

doi:10.1016/j.surfcoat.2020.125742

Cited by 16 publications

(4 citation statements)

References 31 publications

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“…Alloys have been used as bone implants for many years. Among them, stainless steel, cobalt-based alloys (CoCrMo), and titanium and their alloys are widely used for their good biocompatibility, sufficient mechanical strength, and excellent corrosion resistance ( Gross et al, 2020 ; Shipilova et al, 2020 ). However, implants made from these materials are usually much stiffer than natural bone, leading to stress shielding - a significant source of bone resorption and eventual failure of such implants.…”

Section: Introductionmentioning

confidence: 99%

Bio-high entropy alloys: Progress, challenges, and opportunities

Feng

Tang

Liu

et al. 2022

Front. Bioeng. Biotechnol.

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With the continuous progress and development in biomedicine, metallic biomedical materials have attracted significant attention from researchers. Due to the low compatibility of traditional metal implant materials with the human body, it is urgent to develop new biomaterials with excellent mechanical properties and appropriate biocompatibility to solve the adverse reactions caused by long-term implantation. High entropy alloys (HEAs) are nearly equimolar alloys of five or more elements, with huge compositional design space and excellent mechanical properties. In contrast, biological high-entropy alloys (Bio-HEAs) are expected to be a new bio-alloy for biomedicine due to their excellent biocompatibility and tunable mechanical properties. This review summarizes the composition system of Bio-HEAs in recent years, introduces their biocompatibility and mechanical properties of human bone adaptation, and finally puts forward the following suggestions for the development direction of Bio-HEAs: to improve the theory and simulation studies of Bio-HEAs composition design, to quantify the influence of composition, process, post-treatment on the performance of Bio-HEAs, to focus on the loss of Bio-HEAs under actual service conditions, and it is hoped that the clinical application of the new medical alloy Bio-HEAs can be realized as soon as possible.

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Section: Introductionmentioning

confidence: 99%

Bio-high entropy alloys: Progress, challenges, and opportunities

Feng

Tang

Liu

et al. 2022

Front. Bioeng. Biotechnol.

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“…In the case of solving the problem of surface charging, the implantation of metal ions in the surface of dielectrics is an effective tool for the synthesis of near-surface layers consisting of a composite of the target material and the material of the implanted impurity [11][12][13]. The result of the implantation process is a modification of the mechanical, optical and electrical properties of the dielectric surface while maintaining the original properties in the body of the dielectric [14,15].…”

Section: Introductionmentioning

confidence: 99%

Neutralization of the Surface Charge of an Insulated Target under the Interaction of High-Energy Metal Ion Beams

Savkin

Окс

Nikolaev

et al. 2023

QuBS

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The interaction of ion beams with dielectric materials is an urgent problem, both from the point of view of practical application in ion implantation processes and for understanding the fundamental processes of charge compensation and the effective interaction of beam ions with a target surface. This paper presents the results of studies of the processes of compensation of the surface charge of an insulated collector upon interaction with a beam of metal ions with energies up to 50–150 keV. At low pressure (about 10−6 torr), removing the collector from the region of extraction and beam formation makes it possible to reduce the floating potential to a value of 5–10% of the total accelerating voltage. This phenomenon allows for the efficient implantation of metal ions onto the surface of alumina ceramics. We have shown that the sheet resistance of dielectric targets depends on the material of the implanted metal ions and decreases with an increase in the implantation dose by 3–4 orders of magnitude compared with the initial value at the level of 1012 Ω per square.

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“…Nanosized metallic particles possess unique optic and electronic properties. 6 In addition to these properties, they have a remarkable surface-to-volume ratio, resulting in a high number of available active sites per unit area in comparison with their bulk analogues, making them excellent candidates for catalysis. 7 However, this feature is often strongly altered; when the metallic nanoparticles (MNPs) are used alone, they tend to agglomerate because of their high surface free energy.…”

Section: Introductionmentioning

confidence: 99%

“…Nanosized metallic particles possess unique optic and electronic properties . In addition to these properties, they have a remarkable surface-to-volume ratio, resulting in a high number of available active sites per unit area in comparison with their bulk analogues, making them excellent candidates for catalysis .…”

Section: Introductionmentioning

confidence: 99%

Efficient and Recyclable Heterogeneous Catalyst Based on PdNPs Stabilized on a Green-Synthesized Graphene-like Nanomaterial: Effect of Surface Functionalization

Mahouche‐Chergui

Oun

Haddadou

et al. 2021

ACS Appl. Mater. Interfaces

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This work reports for the first time a straightforward and efficient approach to covalent surface functionalization of a sustainable graphene-like nanomaterial with abundant carboxylic acid groups. This approach results in an efficient and robust chelatant platform for anchoring highly dispersed ultrasmall palladium particles with excellent catalytic activity in the reduction of both cationic (methylene blue, MB) and anionic (eosin-Y, Eo-Y) toxic organic dyes. The large-specific-surface-area (S BET = 266.94 m 2 /g) graphene-like nanomaterial (GHN) was prepared through a green and cost-effective pyrolysis process from saccharose using layered bentonite clay as a template. To introduce a high density of carboxylic acid functions, GHN was first doubly functionalized by successive grafting reaction using two different strategies: (i) in the first case, GHN was first grafted by (3-glycidyloxypropyl) trimethoxysilane (GPTMS) and then bifunctionalized by chemical grafting of tris(4-hydroxyphenyl)methane triglycidyl ether (TGE). In the second case, the grafting order of the two molecules has been reversed. GHN-GPTMS-TGE provided the highest number of grafted reactive epoxy groups, and it was selected for further functionalization with carboxylic acid functions via a ringopening reaction through a two-step hydrolysis (H 2 SO 4 )/oxidation (KMnO 4 ) approach. The GHN nanomaterial bearing carboxylic acid groups was then treated with sodium hydroxide to produce a deprotonated carboxylic acid-rich platform. Finally, due to a high density of accessible chelatant carboxylic acid groups, GHN−COO − binds strongly a great amount of Pd 2+ ions to form stable complexes which after reduction by NaBH 4 leads to highly dispersed, densely anchored, and uniformly distributed nanoscale Pd particles (d ∼ 4.5 nm) on the surface of the functionalized GHN. The GHN−COO − @PdNPs nanohybrid proved to be highly efficient for dye reduction by NaBH 4 in aqueous solution at room temperature. Moreover, because of the high stability of the asprepared graphene-like supported PdNPs, it exhibited very good reusability and could be recycled up to eight times without any significant loss in activity.

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Fabrication of metal-dielectric nanocomposites using a table-top ion implanter

Cited by 16 publications

References 31 publications

Bio-high entropy alloys: Progress, challenges, and opportunities

Bio-high entropy alloys: Progress, challenges, and opportunities

Neutralization of the Surface Charge of an Insulated Target under the Interaction of High-Energy Metal Ion Beams

Efficient and Recyclable Heterogeneous Catalyst Based on PdNPs Stabilized on a Green-Synthesized Graphene-like Nanomaterial: Effect of Surface Functionalization

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