AI Article Synopsis
- The study investigates the impact of different titanium content in diamond-like carbon (DLC) coatings on silicon substrates, modified by self-assembled monolayers of decylphosphonic acid (DP) and perfluorodecylphosphonic acid (PFDP).
- The presence of these monolayers was confirmed using Fourier transform infrared spectroscopy (FTIR), and their modification significantly improved the coatings' wettability, friction properties, and antimicrobial activity.
- Results indicated that the dispersive component of surface free energy (SFE) played a crucial role in reducing bacterial growth by up to 95% and lowering the friction coefficient under various loading conditions.
Article Abstract
The diamond-like carbon (DLC) coatings containing 1.6%, 5.3% and 9.4 at.% of Ti deposited by the radio frequency plasma enhanced chemical vapor deposition (RF PECVD) method on the silicon substrate were modified by -decylphosphonic acid (DP) and 1H, 1H, 2H and 2H-perfluorodecylphosphonic acid (PFDP). The presence of perfluoro and alkylphosphonic self-assembled monolayers prepared by the liquid phase deposition (LPD) technique was confirmed by Fourier transform infrared spectroscopy (FTIR). It was shown that DP and PFDP monolayers on the surface of titanium incorporated diamond-like carbon (Ti-DLC) coatings had a huge influence on their wettability, friction properties, stability under phosphate- and tris-buffered saline solutions and on antimicrobial activity. It was also found that the dispersive component of surface free energy (SFE) had a significant influence on the value of the friction coefficient and the percentage value of the growth inhibition of bacteria. The dispersive component of SFE caused a reduction in the growth of bacteria and the friction coefficient in mili- and nano-newton load range. Additionally, both self-assembled monolayers prepared on Ti-DLC coatings strongly reduced bacterial activity by up to 95% compared to the control sample.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6696178 | PMC |
| http://dx.doi.org/10.3390/ma12152365 | DOI Listing |
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