Growth Mechanisms Involved in the Synthesis of Smooth and Microtextured Films by Acetylene Magnetron Discharges

Vriendt, Valérie De; Miladinović, Saša M.; Colaux, Julien L.; Maseri, Fabrizio; Wilkins, Charles L.; Lucas, Stéphane

doi:10.1021/la2003035

Cited by 10 publications

(12 citation statements)

References 51 publications

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“…Induced polymeric‐like structure is related to a high presence of sp 2 clusters and the generation of transpolyacetylene chains 47. Nanoindentation measurements of the present samples have shown typical hardness value of 3 GPa, whereas the reduced Young's modulus was around 35 GPa, confirming the soft character of the grown a‐C:H coatings 47…”

Section: Resultsmentioning

confidence: 99%

Bioactivity and hemocompatibility study of amorphous hydrogenated carbon coatings produced by pulsed magnetron discharge

López‐Santos

Colaux

Laloy

et al. 2012

J Biomedical Materials Res

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Literature contains very few data about the potential biomedical application of amorphous hydrogenated carbon (a-C:H) thin films deposited by reactive pulsed magnetron discharge even so it is one of the most scalable plasma deposition technique. In this article, we show that such a C2H2 pulsed magnetron plasma produces high quality coating with good hemocompatibility and bioactive response: no effect on hemolysis and hemostasis were observed, and proliferation of various cell types such as endothelial, fibroblast, and osteoblast-like cells was not affected when the deposition conditions were varied. Cell growth on a-C:H coatings is proposed to take place by a two-step process: the initial cell contact is affected by the smooth topography of the a-C:H coatings, whereas the polymeric-like structure, together with a moderate hydrophilicity and a high hydrogen content, directs the posterior cell spreading while preserving the hemocompatible behavior.

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Section: Resultsmentioning

confidence: 99%

Bioactivity and hemocompatibility study of amorphous hydrogenated carbon coatings produced by pulsed magnetron discharge

López‐Santos

Colaux

Laloy

et al. 2012

J Biomedical Materials Res

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“…In this context, the scientific community has intensively investigated the influence of the chemical precursors, among which the methane (CH 4 ) and the acetylene (C 2 H 2 ) have received particular attention. [10,[15][16][17][18] These molecules present significant differences in terms of hydrogen content (H/C ¼ 4 for CH 4 and 1 for C 2 H 2 ) as well as carbon bonding configuration (sp 3 for CH 4 and sp 1 for C 2 H 2 ), resulting in different growth mechanisms which would affect the sp 3 and the hydrogen proportion in the coatings.…”

Section: Introductionmentioning

confidence: 99%

Toward a Better Understanding of the Influence of the Hydrocarbon Precursor on the Mechanical Properties of a‐C:H Coatings Synthesized by a Hybrid PECVD/PVD Method

Thiry

Vreese

Renaux

et al. 2015

Plasma Processes & Polymers

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In this work, we provide new insight on the influence of the precursor (CH 4 vs. C 2 H 2 ) on the mechanical properties of a-C:H coatings synthesized in a hybrid PECVD/PVD process. For a given set of plasma parameters, the films synthesized in CH 4 /Ar gas mixture are found harderthan the ones prepared in C 2 H 2 /Ar atmosphere despite their lower sp 3 density and similar hydrogen content. This unusual behavior is attributed to different molecular organization of the polymeric network constituting the films. The latter is explained considering the influence of the chemical nature of the film-forming species onthe cross-linking and branching degree of the films. The whole set of our results unambiguously demonstrates that additional factorsthan the sp 3 and hydrogen content have to be considered for explaining the mechanical properties of a-C:H layers.

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“…Thus, growth studies based on optical spectroscopy [1,22], spectroscopy ellipsometry [20], mass spectrometry [23,24] and energetic considerations about the impinging species [25] can be found. Other proposed models come from the analysis of the a-CH x coating properties.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Growth Mechanisms of a-CH_x Coatings Deposited by Pulsed Reactive Magnetron Sputtering

et al. 2012

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The study of the growth mechanisms of amorphous hydrogenated carbon coatings (a-CH x ) deposited by reactive pulsed magnetron discharge in Ar+C 2 H 2 , Ar+H 2 and Ar+C 2 H 2 +H 2 low pressure atmospheres is presented in this work. Hydrogen-containing species of the reactant gas affect the microstructure and surface properties of the a-CH x thin films. The dynamic scaling theory has been used to relate the main reactive species involved in the deposition process to the growth mechanisms of the thin film by means of the analysis of the roughness evolution. Anomalous scaling effects have been observed in the smooth a-CH x coatings. Dynamic scaling exponents α, β and z indicate a general growth controlled by surface diffusion mechanisms. Hydrogen species have an influence on the lateral growth of the a-CH x coatings and are involved in the development of a polymeric-like structure. Meanwhile, hydrocarbon species promote the generation of 2 higher aggregates that increases the roughness of a more sp 2 clustering structure of the aa-CH x coating.

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Growth Mechanisms Involved in the Synthesis of Smooth and Microtextured Films by Acetylene Magnetron Discharges

Cited by 10 publications

References 51 publications

Bioactivity and hemocompatibility study of amorphous hydrogenated carbon coatings produced by pulsed magnetron discharge

Bioactivity and hemocompatibility study of amorphous hydrogenated carbon coatings produced by pulsed magnetron discharge

Toward a Better Understanding of the Influence of the Hydrocarbon Precursor on the Mechanical Properties of a‐C:H Coatings Synthesized by a Hybrid PECVD/PVD Method

Investigation of the Growth Mechanisms of a-CH_x Coatings Deposited by Pulsed Reactive Magnetron Sputtering

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Growth Mechanisms Involved in the Synthesis of Smooth and Microtextured Films by Acetylene Magnetron Discharges

Cited by 10 publications

References 51 publications

Bioactivity and hemocompatibility study of amorphous hydrogenated carbon coatings produced by pulsed magnetron discharge

Bioactivity and hemocompatibility study of amorphous hydrogenated carbon coatings produced by pulsed magnetron discharge

Toward a Better Understanding of the Influence of the Hydrocarbon Precursor on the Mechanical Properties of a‐C:H Coatings Synthesized by a Hybrid PECVD/PVD Method

Investigation of the Growth Mechanisms of a-CHx Coatings Deposited by Pulsed Reactive Magnetron Sputtering

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Investigation of the Growth Mechanisms of a-CH_x Coatings Deposited by Pulsed Reactive Magnetron Sputtering