Control of calcium phosphate thin film stoichiometry using multi-target sputter deposition

Boyd, Adrian; O'Kane, Christopher A. J.; Meenan, Brian J.

doi:10.1016/j.surfcoat.2013.04.017

Cited by 51 publications

(78 citation statements)

References 49 publications

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“…RF magnetron sputtering of CaP thin films has been shown to offer significant advantages over other deposition techniques due to the fact that it can offer significant control over the processing conditions [104]. An extensive range of sputter deposition parameters have been investigated and shown to influence the properties of the resultant HA-based surfaces, including discharge power level [105], gas pressure [106], thermal processing conditions [107], and target stoichiometry [99,100,108].…”

Section: Antimicrobial and Bioactive Coatingsmentioning

confidence: 99%

“…An extensive range of sputter deposition parameters have been investigated and shown to influence the properties of the resultant HA-based surfaces, including discharge power level [105], gas pressure [106], thermal processing conditions [107], and target stoichiometry [99,100,108]. For a given operational condition, the target composition and stoichiometry can directly influence the Ca/P ratio of the sputter-deposited surface [104]. The content of the silicon was 1.2 and 4.6 at.% for the coatings prepared using the Si-HA precursor powders with a chemical formula of Ca 10 (PO 4 ) 6-x (SiO 4 ) x (OH) 2-x , where x = 0.5 and 1.72.…”

Section: Antimicrobial and Bioactive Coatingsmentioning

confidence: 99%

“…As-deposited sputtered Si-HA coatings with 4.6 at.% of Si are amorphous but can be annealed using an appropriate energy source to increase the presence of crystalline phases [104]. The annealed silicate-containing HA-based coatings have shown an improvement in biological performance over their undoped counterparts [90,91].…”

Section: Antimicrobial and Bioactive Coatingsmentioning

confidence: 99%

See 2 more Smart Citations

Bioceramic Coatings for Metallic Implants

Vlădescu

Surmeneva

Cotruț

et al. 2016

Handbook of Bioceramics and Biocomposites

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Section: Antimicrobial and Bioactive Coatingsmentioning

confidence: 99%

Section: Antimicrobial and Bioactive Coatingsmentioning

confidence: 99%

Section: Antimicrobial and Bioactive Coatingsmentioning

confidence: 99%

See 1 more Smart Citation

Bioceramic Coatings for Metallic Implants

Vlădescu

Surmeneva

Cotruț

et al. 2016

Handbook of Bioceramics and Biocomposites

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“…Однако в научно-технической литературе на сегодняшний день практически отсутствует информация по модифицированию поверхности биорезорбируемых полимеров в плазме аномально тлеющего разряда, возникающего в процессе высокочастотного магнетронного распыления (ВЧМР) твердых диэлектрических мишеней. Вместе с тем, применение метода ВЧМР для модификации биорезорбируемых полимеров позволяет в широких пределах изменять химический состав обрабатываемой поверхности, не только путём изменения рабочей атмосферы, но и путём изменения состава распыляемой мишени [14,15].…”

Section: Introductionunclassified

Effect of radio frequency discharge plasma on surface properties and biocompatibility of polycaprolactone matrices

et al. 2016

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Surface modification of bioresorbable polymer material (polycaprolactone, PCL) with abnormal glow discharge, initiated during radio-frequency magnetron sputtering of a hydroxyapatite target was investigated. Plasma treatment resulted in an increase of surface roughness of PCL, crystallite size, the surface free energy and hydrophilicity. Increased treatment time (30, 60, 150 seconds) provoked the polymer surface saturation with the sputtering target ions (calcium, phosphorus). The assessment of plasma exposure of PCL surface on bone marrow multipotent mesenchymal stromal cells behavior (BM MSCs) has been performed. Modification of the polymer surface with the abnormal glow discharge stimulated adhesion and subsequent proliferation of BM MSCs; thus, maximum values were achieved with the surface treatment for 60 s. This type of plasma modification did not affect cell viability (apoptosis, necrosis). Thus, the surface modification with abnormal glow discharge, initiated during radio-frequency magnetron sputtering of a hydroxyapatite target, appear to be a promising method of surface modification of bioresorbable polymer material (PCL) for tissue engineering.

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“…As shown by Lo et al, Radio frequency (RF) magnetron sputtering has proven to be a useful technique for the controlled deposition of dense uniform thin films of controlled crystallinity of HA and single and mixed phases of CaP based targets [16][17][18][19] . In addition a number of bioactive silicate glass compositions have been sputtered, including the composition deposited by Stan and Berbecaru et al SiO2-40.5 CaO-32 P2O5-1.5 Na2O-9 MgO-17 mol% which showed the formation of apatite in vitro following submersion in Simulated Body Fluid (SBF) [20][21][22][23][24][25] .…”

Section: Introductionmentioning

confidence: 99%

Degradation and Characterization of Resorbable Phosphate-Based Glass Thin-Film Coatings Applied by Radio-Frequency Magnetron Sputtering

Stuart

Gimeno-Fabra

Segal

et al. 2015

ACS Appl. Mater. Interfaces

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(2015) Degradation and characterization of resorbable phosphate-based glass thin-film coatings applied by radio-frequency magnetron sputtering. ACS Applied Materials and Interfaces, 7 (49). pp. 27362-27372. ISSN 1944-8252 Access from the University of Nottingham repository: http://eprints.nottingham.ac.uk/34759/1/Pre-Proof-Degradation%20and%20Characterisation %20of%20Resorbable%20Thin%20Films%20%28002%29.pdf Copyright and reuse:The Nottingham ePrints service makes this work by researchers of the University of Nottingham available open access under the following conditions. This article is made available under the University of Nottingham End User licence and may be reused according to the conditions of the licence. For more details see: http://eprints.nottingham.ac.uk/end_user_agreement.pdf A note on versions:The version presented here may differ from the published version or from the version of record. If you wish to cite this item you are advised to consult the publisher's version. Please see the repository url above for details on accessing the published version and note that access may require a subscription. respectively. This factor led to highly soluble coatings, exhibiting a t 1/2 degradation dependence in the first 2 hours in distilled water, followed by a more characteristic linear profile as the subsequent layers were less soluble. Hydration and degradation was observed to preferentially occur, forming voids characteristic of pitting corrosion which was confirmed by use of a Focused Ion Beam. Coating degradation in PBS precipitated a (PO3) -metaphosphate, X-Ray amorphous layer, which remained adherent to the substrate and seemingly formed a protective diffusion barrier which inhibited further coating degradation.The implications are that whilst compositionally similar, sputter deposited coatings and melt quenched glasses are structurally dissimilar, most notably, with regards to the surface layer.This factor has been attributed to surface etching of the as deposited coating layer during 2 deposition and variation in the thermal history between the processes of magnetron sputtering and melt quenching.

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Control of calcium phosphate thin film stoichiometry using multi-target sputter deposition

Cited by 51 publications

References 49 publications

Bioceramic Coatings for Metallic Implants

Bioceramic Coatings for Metallic Implants

Effect of radio frequency discharge plasma on surface properties and biocompatibility of polycaprolactone matrices

Degradation and Characterization of Resorbable Phosphate-Based Glass Thin-Film Coatings Applied by Radio-Frequency Magnetron Sputtering

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