Surface energy, wettability, and blood compatibility phosphorus doped diamond-like carbon films

Kwok, Sunny; Wang, Jin; Chu, Paul K.

doi:10.1016/j.diamond.2004.07.019

Cited by 236 publications

(120 citation statements)

References 25 publications

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“…For the DLC-O, the contact angle obtained was (63 6 2) (SFE ¼ 39 6 1 mN/m) and, for the DLC-F, was (90 6 1) (SFE ¼ 27 6 2 mN/m), which is compatible with the literature results. [42][43][44] These results agree with those previously reported by Duailibi et al, 45 showing that hydrophilic surfaces benefit cell growth. Concerning to the DLC without plasma treatment, cell growth presented different behaviors for each of the three independent experiments.…”

Section: Resultssupporting

confidence: 83%

Cell adhesion and growth on surfaces modified by plasma and ion implantation

Araujo

Teixeira

Silva

et al. 2014

Journal of Applied Physics

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In this study, we show and discuss the results of the interaction of living CHO (Chinese Hamster Ovary) cells, in terms of adhesion and growth on glass, SU-8 (epoxi photoresist), PDMS (polydimethylsiloxane), and DLC (hydrogen free diamond-like carbon) surfaces. Glass, SU-8, and DLC but not PDMS showed to be good surfaces for cell growth. DLC surfaces were treated by oxygen plasma (DLC-O) and sulfur hexafluoride plasma (DLC-F). After 24 h of cell culture, the number of cells on DLC-O was higher than on DLC-F surface. SU-8 with silver implanted, creating nanoparticles 12 nm below the surface, increased significantly the number of cells per unit area. V C 2014 AIP Publishing LLC. [http://dx

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Section: Resultssupporting

confidence: 83%

Cell adhesion and growth on surfaces modified by plasma and ion implantation

Araujo

Teixeira

Silva

et al. 2014

Journal of Applied Physics

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“…It is widely recognised that surface energy is an important parameter affecting polymers adhesion, material wettability and even biocompatibility [18].…”

Section: Determination Of Surface Energy By Contact Angle Measurementmentioning

confidence: 99%

Modification of the biopolymer castor oil with free isocyanate groups to be applied as bioadhesive

Ferreira

Pereira

Coelho

et al. 2007

International Journal of Biological Macromolecules

133

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Surgical adhesives have been used for several applications, including haemostasis, sealing air leakages and tissue adhesion. The aim of this work was to develop a biodegradable urethane-based bioadhesive containing free isocyanate groups. This material presents the advantage of being biodegradable, biocompatible and having the capacity of reacting with amino groups present in the biological molecules.A urethane based on castor oil (CO) was synthesized by reaction of the molecule with isophorone diisocyanate (IPD). The characterization of the material was accomplished by different techniques: ATR-FT-IR (attenuated transmittance reflection-Fourier transform infrared), swelling capacity determination, evaluation of the moisture curing kinetics, reaction with aminated substrates and determination of surface energy by contact angle measurement. The study of the urethane thermal properties was performed by DMTA (dynamical mechanical thermal analysis) and TGA (thermogravimetric analysis). The haemocompatibility of the urethane was also evaluated by thrombosis and haemolysis tests.

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“…However, the silicon-containing DLC coatings had 20 times lower wear resistance than undoped DLC films. In other recent study [9], phosphorus-doped DLC films were deposited by applying hybrid plasma immersion ion implantation and deposition (PIIID) techniques; the good wettability exhibited by P-doped DLC samples leads to an increase in hemocompatibility. However, in this study the mechanical properties of the modified films were not analyzed.…”

Section: Introductionmentioning

confidence: 99%

Functionalization of hydrogen-free diamond-like carbon films using open-air dielectric barrier discharge atmospheric plasma treatments

Endrino

Marco

Allen

et al. 2008

Applied Surface Science

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A dielectric barrier discharge (DBD) technique has been employed to produce uniform atmospheric plasmas of He and N 2 gas mixtures in open air in order to functionalize the surface of filtered-arc deposited hydrogen-free diamond-like carbon (DLC) films. XPS measurements were carried out on both untreated and He/N 2 DBD plasma treated DLC surfaces. Chemical states of the C 1s and N 1s peaks were collected and used to characterize the surface bonds. Contact angle measurements were also used to record the short-and long-term variations in wettability of treated and untreated DLC.In addition, cell viability tests were performed to determine the influence of various He/N 2 atmospheric plasma treatments on the attachment of osteoblast MC3T3 cells.Current evidence shows the feasibility of atmospheric plasmas in producing long-lasting variations in the surface bonding and surface energy of hydrogen-free DLC and consequently the potential for this technique in the functionalization of DLC coated devices. IntroductionIn a recent study it was shown that the nanoscale wettability of a hydrogenterminated diamond surface was lower than that of regions that had been oxidized using an atomic force microscope tip [1]. The difference in wettability between modified diamond surfaces suggests the application of control wettability of modified carbon surfaces in the fields of medicine and biotechnology, which could also be extended to diamond-like carbon films.Diamond-like carbon (DLC) films are known to be hard, low friction and chemically inert materials. Numerous in-vitro and in-vivo experiments have indicated that DLC can have both excellent biocompatibility and hemocompatibility [2][3][4][5]. In the past, the wettability of DLC coatings has been modified by selective doping using both metal and non-metal dopants [6][7][8]. For instance, both silicon and fluorine can be used to increase the surface energy and reduce the contact angle with water. In one study [6], researchers modified the surface energy of DLC by incorporating oxygen and silicon into the bonding network, thus avoiding the use of harmful fluorine-containing hydrocarbon gases. However, the silicon-containing DLC coatings had 20 times lower wear resistance than undoped DLC films. In other recent study [9], phosphorus-doped DLC films were deposited by applying hybrid plasma immersion ion implantation and deposition (PIIID) techniques; the good wettability exhibited by P-doped DLC samples leads to an increase in hemocompatibility. However, in this study the mechanical properties of the modified films were not analyzed. In a different study [5], substrates with various substrate roughness were employed to investigate the attachment of human osteoblast cells to amorphous carbon films with different surface textures. This study concluded that cell attachment increased monotonically with surface roughness. However, smooth surfaces are critical in the vast majority of biomedical applications and topological functionalization of the surface cannot be seen as a wide-rang...

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Surface energy, wettability, and blood compatibility phosphorus doped diamond-like carbon films

Cited by 236 publications

References 25 publications

Cell adhesion and growth on surfaces modified by plasma and ion implantation

Cell adhesion and growth on surfaces modified by plasma and ion implantation

Modification of the biopolymer castor oil with free isocyanate groups to be applied as bioadhesive

Functionalization of hydrogen-free diamond-like carbon films using open-air dielectric barrier discharge atmospheric plasma treatments

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