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.

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.

On Preparation of SrTiO3 Thin Films with Self-Assembled Monolayers by Liquid Phase Deposition and its Dielectric Properties

2012 ◽  
Vol 512-515 ◽  
pp. 1165-1170
Author(s):  
Wei Guang Han ◽  
Guo Qiang Tan ◽  
Ao Xia ◽  
Hui Jun Ren
Keyword(s):  
Thin Films ◽  
Dielectric Constant ◽  
Dielectric Properties ◽  
Liquid Phase ◽  
Dielectric Loss ◽  
Precursor Solution ◽  
Self Assembled Monolayers ◽  
Liquid Phase Deposition ◽  
Assembled Monolayers ◽  
Self Assembled

In this paper, titanium ammonium fluoride ((NH4)TiF6), strontium nitrate (Sr(NO3)2) and boric acid (H3BO3) were used as raw materials, the precursor solution was prepared with molar ratio of AHFT/SN/BA=1/1/3. SrTiO3 dielectric thin films were deposited with the self-assembled monolayers (SAMs) by the liquid-phase deposition on FTO substrate. X-ray diffraction (XRD), scanning election microscopy (SEM) and Agilent E4980A precision LCR Meter were used to characterize the SrTiO3 films. The precursor solution concentration and the pH values of precursor solution had the effects on the dielectric properties of the as-prepared thin films. When the precursor concentration was 0.0125mol/L, the crystallization of as-prepared SrTiO3 thin films was high and the grain sizes on the film surface were even and dense. When the frequency was 15~100KHz, the optimal dielectric constant was up to 1060, the minimal dielectric loss was 4.053. As pH=3.30, the frequency of the as-prepared SrTiO3 thin films was 15~100KHz. The optimal dielectric constant was up to 1060, too. The minimal dielectric loss was 1.914. The optimal dielectric constants were 346.3 and 424.1 when the pH was 3.1 and below 3.5 respectively. The minimal dielectric losses were respectively 18.10 and 54.82.

Properties of BiFeO3 Thin Films Prepared with Self-Assembled Monolayers by Liquid Phase Deposition

2012 ◽  
Vol 512-515 ◽  
pp. 1244-1248
Author(s):  
Jun Yin ◽  
Guo Qiang Tan ◽  
Li Hua Song ◽  
Ao Xia ◽  
Hui Jun Ren
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Liquid Phase ◽  
Deposition Temperature ◽  
Raw Materials ◽  
Self Assembled Monolayers ◽  
Liquid Phase Deposition ◽  
Test Frequency ◽  
Assembled Monolayers ◽  
Self Assembled

Using iron nitrate, bismuth nitrate, citric acid and glacial acetic acid as the raw materials, the BiFeO3 thin films in crystalline state were prepared on FTO substrate with the self-assembled monolayers by liquid phase deposition after graded induction and annealing at 550°C for 30min. The physical phase composition, the surface morphology and dielectric properties of the thin films were characterized respectively by XRD, SEM, and Precision LCR Meter. This paper studied that the deposition temperature and the number of film layers had the effects on the thin films. The results show that the as-prepared thin films show the random orientation and good crystalline. When the deposition temperature is 70°C, the surface of the as-prepared thin film is smooth and uniform. The size of grain is 100nm. The thin film has a dense structure without the apparent pore phase. When the test frequency is between 1kHz and 1MHz, the loss of the thin films is decreased as the increase of the number of the film layers. When the number of the layers is 15, the dielectric constant of the thin films is 44 and the loss is 0.02 when the test frequency is 10kHz.

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