Amorphous carbon nitrogenated films prepared by plasma immersion ion implantation and deposition

Rangel, Elidiane Cipriano; Durrant, Steven F.; Rangel, Rita C.C.; Kayama, M. E.; Landers, Richard; Cruz, Nilson Cristino da

doi:10.1016/j.tsf.2006.05.016

Cited by 16 publications

(10 citation statements)

References 22 publications

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“…Besides plasma reactivity and species availability, another factor that influences the concentration of C-H in the film is ion bombardment promoted by the self-bias voltage of the driven electrode. Indeed, the proportion of argon in the plasma itself influences the ion bombardment process [ 22 ]. Thus, the presence of argon affects the proportion of C-H in the solid phase [ 21 , 22 ].…”

Section: Resultsmentioning

confidence: 99%

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Cell Adhesion to Plasma-Coated PVC

Rangel

Souza

Moraes

et al. 2014

The Scientific World Journal

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To produce environments suitable for cell culture, thin polymer films were deposited onto commercial PVC plates from radiofrequency acetylene-argon plasmas. The proportion of argon in the plasmas, PAr, was varied from 5.3 to 65.8%. The adhesion and growth of Vero cells on the coated surfaces were examined for different incubation times. Cytotoxicity tests were performed using spectroscopic methods. Carbon, O, and N were detected in all the samples using XPS. Roughness remained almost unchanged in the samples prepared with 5.3 and 28.9% but tended to increase for the films deposited with PAr between 28.9 and 55.3%. Surface free energy increased with increasing PAr, except for the sample prepared at 28.9% of Ar, which presented the least reactive surface. Cells proliferated on all the samples, including the bare PVC. Independently of the deposition condition there was no evidence of cytotoxicity, indicating the viability of such coatings for designing biocompatible devices.

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Section: Resultsmentioning

confidence: 99%

“…Indeed, the proportion of argon in the plasma itself influences the ion bombardment process [ 22 ]. Thus, the presence of argon affects the proportion of C-H in the solid phase [ 21 , 22 ].…”

Section: Resultsmentioning

confidence: 99%

Cell Adhesion to Plasma-Coated PVC

Rangel

Souza

Moraes

et al. 2014

The Scientific World Journal

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“…Modification of the plasma conditions may produce surfaces with different characteristics 9,10 . One of the surface properties that may be greatly modified by plasma exposure is the contact angle.…”

Section: Resultsmentioning

confidence: 99%

Evaluation of blood compatibility of plasma deposited heparin-like films and SF6 plasma treated surfaces

et al. 2010

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In devices used in open-heart surgery and dialysis, blood must be continuously processed using extracorporeal circuits composed of peristaltic pumps and active components such as specific filters and oxygenators. Several procedures have been employed to avoid blood coagulation induced by contact with the artificial surfaces of such devices. Often heparin, a bioactive protein able to prevent clot formation, is employed. In this work, we have used heparin-containing gas plasmas to evaluate the possibility of depositing adherent anticoagulant films onto PVC and glass surfaces. The films were produced by radiofrequency plasma enhanced chemical vapor deposition from heparin/isopropanol and heparin/hexamethyldisiloxane solutions. In addition, the effects of exposure to SF 6 plasmas on the compatibility of such surfaces have also been investigated. The blood compatibility was evaluated through the determination of the density of platelets and fibrinogen and activated partial thromboplastin (APTT) and prothrombin times (PT) of human blood freshly collected and after contact for 2.5 hours with different surfaces. The deposited films were also characterized by infrared spectroscopy, contact angle and surface energy measurements. The coagulation time of blood, placed in contact with glass substrates coated by PECVD films of heparin/isopropanol mixtures, and in contact with SF 6 plasma-treated PVC, increased by about 60 and 20%, respectively, compared to the values measured with untreated samples.

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“…Films were produced by PECVD in a conventional in-house built radiofrequency system described in detail elsewhere [17]. In brief, a cylindrical stainless-steel chamber is fed gases via precision flowmeters and vapors of liquid monomers from glass vessels sealed by needle valves.…”

Section: Methodsmentioning

confidence: 99%

Characterization of amorphous hydrogenated chlorinated plasma polymers

Rossi

Schreiner

Durrant

2016

Surface and Coatings Technology

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Thin films were produced by plasma enhanced chemical vapor deposition from propanol-chloroform-argon mixtures. The main system parameter studied was the percentage of chloroform in the chamber feed, C Cl. Plasma polymers doped with chlorine were produced at deposition rates of up to 110 nm min −1. As revealed by infraredand X-ray photoelectron spectroscopy, the films consisted of a hydrogenated carbon matrix with a carbon content of at least 80 at.%, and a roughly constant oxygen content of about 12 at.%. A maximum chlorine content of~8 at.% was obtained. The surface contact angle of the films was around 75°, and was reduced slightly at greater chlorine contents. Optical properties were obtained from ultraviolet-visible-near infrared spectroscopic data. While the refractive index of the films was around 1.56 independently of C Cl , the chlorinated films showed a distinct optical gap of~2.5 eV compared to~1.9 eV for the unchlorinated film.

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Amorphous carbon nitrogenated films prepared by plasma immersion ion implantation and deposition

Cited by 16 publications

References 22 publications

Cell Adhesion to Plasma-Coated PVC

Cell Adhesion to Plasma-Coated PVC

Evaluation of blood compatibility of plasma deposited heparin-like films and SF6 plasma treated surfaces

Characterization of amorphous hydrogenated chlorinated plasma polymers

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