scholarly journals Impact of Perfluoro and Alkylphosphonic Self-Assembled Monolayers on Tribological and Antimicrobial Properties of Ti-DLC Coatings

Materials ◽  
2019 ◽  
Vol 12 (15) ◽  
pp. 2365 ◽  
Author(s):  
Michal Cichomski ◽  
Milena Prowizor ◽  
Ewelina Borkowska ◽  
Ireneusz Piwoński ◽  
Anna Jędrzejczak ◽  
...  
Keyword(s):  
Friction Coefficient ◽  
Control Sample ◽  
Antimicrobial Properties ◽  
Self Assembled Monolayers ◽  
Diamond Like Carbon ◽  
Dispersive Component ◽  
Load Range ◽  
Dlc Coatings ◽  
Assembled Monolayers ◽  
Self Assembled

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 n-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.

scholarly journals The Effect of Physicochemical Properties of Perfluoroalkylsilanes Solutions on Microtribological Features of Created Self-Assembled Monolayers

Materials ◽  
2020 ◽  
Vol 13 (15) ◽  
pp. 3357
Author(s):  
Michał Cichomski ◽  
Ewelina Borkowska ◽  
Milena Prowizor ◽  
Damian Batory ◽  
Anna Jedrzejczak ◽  
...  
Keyword(s):  
Surface Tension ◽  
Liquid Phase ◽  
Silicon Content ◽  
Self Assembled Monolayers ◽  
Diamond Like Carbon ◽  
Liquid Phase Deposition ◽  
Load Range ◽  
Dlc Coatings ◽  
Assembled Monolayers ◽  
Self Assembled

The presented article shows the influence of concentration of perfluoroalkylsilanes in solutions on tribological properties of self-assembled monolayers (SAMs) deposited on three surfaces with different silicon content in the millinewton load range. The SAMs were created using the liquid phase deposition (LPD) method with 1H, 1H, 2H, 2H-perfluorodecyltrichlorosilane (FDTS) and (3, 3, 3-trifluoropropyl) trichlorosilane (FPTS) solutions, for which viscosity and surface tension were estimated. Deposited layers were analyzed in terms of thickness, coverage, wettability, structure and coefficient of friction. The obtained results demonstrated that SAMs created on the silicon-incorporated diamond-like carbon (Si-DLC) coatings possess the best microtribological properties. Systems composed of perfluoroalkylsilane SAM structures deposited on Si-DLC coatings are highly promising candidates as material for microelectromechanical applications.

The influence of self-assembled monolayers on tribological properties of Si-DLC coatings

2019 ◽  
Vol 7 (4) ◽  
pp. 045006 ◽  
Author(s):  
M Cichomski ◽  
A Kisielewska ◽  
M Prowizor ◽  
E Borkowska ◽  
I Piwoński ◽  
...  
Keyword(s):  
Tribological Properties ◽  
Self Assembled Monolayers ◽  
Dlc Coatings ◽  
Assembled Monolayers ◽  
Self Assembled

Odd-Even Effects on Tribology of Self Assembled Monolayers

2011 ◽  
Author(s):  
Leyla Ramin ◽  
Ahmad Jabbarzadeh
Keyword(s):  
Molecular Dynamics ◽  
Friction Coefficient ◽  
Molecular Dynamics Simulations ◽  
Strong Evidence ◽  
Self Assembled Monolayers ◽  
Frictional Properties ◽  
Assembled Monolayers ◽  
Self Assembled ◽  
Dynamics Simulations

We have conducted molecular dynamics simulations to study the frictional properties of alkanethiols on Au(111) surfaces, under various loading and shearing conditions. For alkanethiols we find the film responds to increased loading initially by increasing the tilt and then by deformation of individual molecules. We find strong evidence of the friction coefficient being dependent on the number of carbon atoms in the molecule being odd or even. Odd alkanethiols show consistently higher friction coefficient. The structural origin of this odd-even effect observed under various sliding velocities has been discussed.

Surface and antimicrobial properties of semi-fluorinated quaternary ammonium thiol surfactants potentially usable for Self-Assembled Monolayers

2010 ◽  
Vol 131 (5) ◽  
pp. 592-596 ◽  
Author(s):  
Pascal Thebault ◽  
Elisabeth Taffin de Givenchy ◽  
Serge Géribaldi ◽  
Richard Levy ◽  
Yves Vandenberghe ◽  
...  
Keyword(s):  
Quaternary Ammonium ◽  
Antimicrobial Properties ◽  
Self Assembled Monolayers ◽  
Assembled Monolayers ◽  
Self Assembled

Electrochemical behavior of self-assembled monolayers based on functionalized oligothiophenes

1998 ◽  
Vol 95 (6) ◽  
pp. 1339-1342 ◽  
Author(s):  
R. Michalitsch ◽  
A. El Kassmi ◽  
P. Lang ◽  
A. Yassar ◽  
F. Garnier
Keyword(s):  
Electrochemical Behavior ◽  
Self Assembled Monolayers ◽  
Assembled Monolayers ◽  
Self Assembled

Imaging of patterned self-assembled monolayers by scanning photoelectron microscopy

2003 ◽  
Vol 104 ◽  
pp. 459-462 ◽  
Author(s):  
R. Klauser ◽  
M. Zharnikov ◽  
I.-H. Hong ◽  
S.-C. Wang ◽  
A. Gölzhäuser ◽  
...  
Keyword(s):  
Self Assembled Monolayers ◽  
Assembled Monolayers ◽  
Scanning Photoelectron Microscopy ◽  
Self Assembled
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