The effect of hydrogen and acetylene mixing ratios on the surface, mechanical and biocompatible properties of diamond-like carbon films

Wei, Chehung; Peng, Kang-Shen; Hung, Min-Sheng

doi:10.1016/j.diamond.2015.10.031

Cited by 23 publications

(6 citation statements)

References 51 publications

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“…The enhancement of SFE is a desirable effect since it improves interfacial interactions ideal for cell growth and biological response. 49,56) As shown in Fig. 9, the surface-modified PTFE would allow complete wetting of the representative bodily fluids such as blood, synovial fluid, and human plasma since these fluids lie inside the envelope.…”

Section: Discussionmentioning

confidence: 99%

Grafting of acrylic acid onto microwave plasma-treated polytetrafluoroethylene (PTFE) substrates

Valerio

Nakajima

Vasquez

2018

Jpn. J. Appl. Phys.

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Polytetrafluoroethylene (PTFE) has limited use in biomedical applications due to its poor wettability and low adhesion strength. Enhancing these properties through modification via plasma treatment coupled with grafting can further improve its surface properties ideal for biomedical applications. In this study, hydrophilic PTFE samples were successfully realized using a modified 2.45 GHz microwave oven as the plasma treatment device followed by grafting copolymerization using acrylic acid (AAc). This resulted to an increase in surface free energy (SFE) where samples subjected to air plasma treatment and AAc grafting exhibited the largest increase in SFE of 58 mJ m−2 compared to 17 mJ m−2 for the untreated samples. Fourier-transform infrared spectroscopy and X-ray photoelectron spectroscopy revealed new functional groups in the O1s and C1s regions of PTFE after plasma treatment and grafting. Atomic force microscopy analysis showed increase in surface roughness with the largest value of 67.7 nm found in air plasma-treated and grafted samples compared to 20.9 nm for the untreated PTFE sample. The plasma-treated and grafted PTFE surfaces did not exhibit hydrophobic recovery during a 7 d observation period as compared to plasma-treated samples only. The effective combination of plasma treatment and grafting process would broaden potential applications of PTFE as a biomaterial.

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Section: Discussionmentioning

confidence: 99%

Grafting of acrylic acid onto microwave plasma-treated polytetrafluoroethylene (PTFE) substrates

Valerio

Nakajima

Vasquez

2018

Jpn. J. Appl. Phys.

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“…Hydrophobicity, rough pre-deposition substrate, low surface free energy, low hydrogen content, and large residual stress are adverse for cell viability, with the ejection of cellular lamellipodia and controlled escalation of the cells depending on substrate topography [173][174][175]. Higher hydrogen precursor contents (>30%) give rise to smoother surfaces, lower contact angles, and higher surface free energy, which seem to be favorable to cell cultures, presenting greater cell growth [176]. In human fibroblast primary cells (AG 01522D), DLC coatings deposited by magnetron sputtering show the best biocompatibility results, demonstrating that the electron-beam modification of DLC coatings is a suitable process for controlling and guiding cell adhesion on implant surfaces [177].…”

Section: Dlc Biocompatibilitymentioning

confidence: 99%

Overview on the Antimicrobial Activity and Biocompatibility of Sputtered Carbon-Based Coatings

et al. 2021

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Due to their outstanding properties, carbon-based structures have received much attention from the scientific community. Their applications are diverse and include use in coatings on self-lubricating systems for anti-wear situations, thin films deposited on prosthetic elements, catalysis structures, or water remediation devices. From these applications, the ones that require the most careful testing and improvement are biomedical applications. The biocompatibility and antibacterial issues of medical devices remain a concern, as several prostheses still fail after several years of implantation and biofilm formation remains a real risk to the success of a device. Sputtered deposition prevents the introduction of hazardous chemical elements during the preparation of coatings, and this technique is environmentally friendly. In addition, the mechanical properties of C-based coatings are remarkable. In this paper, the latest advances in sputtering methods and biocompatibility and antibacterial action for diamond-based carbon (DLC)-based coatings are reviewed and the greater outlook is then discussed.

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“…Diamond remains a material of choice for applications where extremes of thermal conductivity (2000 W m -1 K -1 ), Young's modulus (1220 GPa), mechanical surface and bulk hardness (100 GPa), optical index of refraction from ultra-violet (UV) to infra-red (IR) range (2.41), dielectric constant (5.7) and electrical resistivity (10 13 -10 16 Ohm-cm) and low thermal expansion (1.1 × 10 -6 K -1 ) are required [1][2][3][4], such as in ultra-high precision machining tools [5], micro-electro mechanical system (MEMS) and MEMS components [6], robust optical gratings [7], inert and environmentally stable medical coatings [8][9][10], and electronic devices for harsh environments [11]. The availability of synthetic diamonds in different grades (i.e., 'a' and 'b' grades), in various degrees of crystallinity, purity, degrees and types of doping, physical shapes and forms and, subsequently, at highly varied prices, made synthetic diamonds both more attractive and more economically accessible for a wide range of industrial applications compared to their natural counterpart [12,13], including the applications where diamond and its derivatives are used as machining tools [14].…”

Section: Introductionmentioning

confidence: 99%

Femtosecond laser micromachining of diamond: Current research status, applications and challenges

Ali

Litvinyuk

Rybachuk

2021

Carbon

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Ultra-fast femtosecond (fs) lasers provide a unique technological opportunity to precisely and efficiently micromachine materials with minimal thermal damage owing to the reduced heat transfer into the bulk of the work material offered by short pulse duration, high laser intensity and focused optical energy delivered on a timescale shorter than the rate of thermal diffusion into the surrounding area of a beam foci. There is an increasing demand to further develop the fs-machining technology to improve the machining quality, minimize the total machining time and increase the flexibility of machining complex patterns on diamond. This article offers an overview of recent research findings on the application of fs-laser technology to micromachine diamond. The laser technology to precisely micromachine diamond is discussed and detailed, with a focus on the use of fs-laser irradiation systems and their characteristics, laser interaction with various types of diamonds, processing and the subsequent post-processing of the irradiated samples and, appropriate sample characterisation methods. Finally, the current and emerging application areas are discussed, and the challenges and the future research prospects in the fs-laser micromachining field are also identified.

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The effect of hydrogen and acetylene mixing ratios on the surface, mechanical and biocompatible properties of diamond-like carbon films

Cited by 23 publications

References 51 publications

Grafting of acrylic acid onto microwave plasma-treated polytetrafluoroethylene (PTFE) substrates

Grafting of acrylic acid onto microwave plasma-treated polytetrafluoroethylene (PTFE) substrates

Overview on the Antimicrobial Activity and Biocompatibility of Sputtered Carbon-Based Coatings

Femtosecond laser micromachining of diamond: Current research status, applications and challenges

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