Copper surface protection by organothiol self-assembled monolayers

2015 ◽  
Vol 1746 ◽  
Author(s):  
Sira Suren ◽  
Supattra Haokratoke ◽  
Soorathep Kheawhom
Keyword(s):  
Corrosion Inhibition ◽  
Coating Layer ◽  
Copper Surface ◽  
Self Assembled Monolayers ◽  
Oxygen Plasma Treatment ◽  
Water Contact ◽  
Surface Protection ◽  
Assembled Monolayers ◽  
Forming Temperature ◽  
Self Assembled

ABSTRACTThis work investigates the effects of concentration of organothiol molecules and temperature used during self-assembled monolayers (SAMs) formation on quality of the organothiol SAMs coating layer obtained in terms of wettability, corrosion inhibition efficiency and carbon to copper ratio. The organothiol SAMs were coated on copper substrates prepared by electro-polishing followed by oxygen plasma treatment for 15 s. Three types of organothiol SAMs including 1-octanethiol (OTT), 2-ethylhexanethiol (2-EHT) and 2-phenylethanethiol (2-PET) were investigated. Concentration of organothiol molecules ranging from 0.005 to 0.02 M in isopropanol and forming temperature ranging from -15 to 50°C were studied. It was found that all organothiol SAMs of 0.01 M provided the SAMs coating layer with the highest quality. The SAMs formed at 40°C with OTT and 2-EHT, and at 0°C with 2-PET were the most favorable condition with the highest water contact angle of 124.79o, 130.66o and 120.58o at corrosion inhibition efficiencies of 96.24%, 99.37% and 98.90%, respectively.

Thermal Stability of Thiolate Self-Assembled Monolayers on Copper Surface

2013 ◽  
Vol 646 ◽  
pp. 18-23 ◽  
Author(s):  
Pacharaporn Kongsumrit ◽  
Soorathep Kheawhom
Keyword(s):  
Thermal Stability ◽  
Oxygen Plasma ◽  
Copper Surface ◽  
Self Assembled Monolayers ◽  
Oxygen Plasma Treatment ◽  
Bond Stability ◽  
Assembled Monolayers ◽  
Ft Ir ◽  
Self Assembled ◽  
Thermal Stability Of

The formation of self-assembled monolayers (SAMs) of organothiol is one of the excellent methods for corrosion protection. This work studies the thermal stability of thiolate SAMs coating on a copper surface. Three types of thiolate SAMs including 1-octanethiol (OTT), 2-ethylhexanethiol (2-EHT), and 2-phenylethanethiol (2-PET) are investigated. These chemicals are similar in terms of the chemical formula but different in chemical structure. Contact angle, AFM, FT-IR, XPS, and potentiodynamic polarization are used to analyze hydrophilic and hydrophobic features, roughness, decomposition of SAMs, and corrosion inhibition efficiency, respectively. The optimum condition of oxygen plasma treatment is determined. The results show that the optimum time for the treatment is 15 s. The oxygen plasma increases roughness of the Cu surface and induces the hydrophilic feature, which is suitable for SAMs to form on the Cu surface. The Cu surfaces coated by each SAMs are annealed at the temperature ranging from 25 to 250°C. The OTT is decomposed at 80°C while the 2-EHT is decomposed at 140°C. The 2-PET is not decomposed at 140°C, because the 2-PET consists of aromatic rings that are more stable than other functional groups in OTT and 2-EHT structures. These results also refer to improvement of thiolate bond stability aided by aromatic ring in the 2-PET molecule. All SAMs are completely decomposed at 250°C. In conclusion, the 2-PET is the most favorable in terms of thermal stability.

scholarly journals Sulfamide chemistry applied to the functionalization of self-assembled monolayers on gold surfaces

2017 ◽  
Vol 13 ◽  
pp. 648-658 ◽  
Author(s):  
Loïc Pantaine ◽  
Vincent Humblot ◽  
Vincent Coeffard ◽  
Anne Vallée
Keyword(s):  
Photoelectron Spectroscopy ◽  
Self Assembled Monolayers ◽  
Gold Surfaces ◽  
Water Contact ◽  
X Ray ◽  
Infrared Reflection Absorption Spectroscopy ◽  
Infrared Reflection ◽  
End Groups ◽  
Assembled Monolayers ◽  
Self Assembled

Aniline-terminated self-assembled monolayers (SAMs) on gold surfaces have successfully reacted with ArSO2NHOSO2Ar (Ar = 4-MeC6H4 or 4-FC6H4) resulting in monolayers with sulfamide moieties and different end groups. Moreover, the sulfamide groups on the SAMs can be hydrolyzed showing the partial regeneration of the aniline surface. SAMs were characterized by water contact angle (WCA) measurements, Fourier-transform infrared reflection absorption spectroscopy (IRRAS) and X-ray photoelectron spectroscopy (XPS).

Self-Assembled Monolayers in Corrosion Inhibition

2021 ◽  
pp. 307-318
Author(s):  
Sunder Ramachandran ◽  
Carlos Menendez ◽  
Tracey Jackson
Keyword(s):  
Corrosion Inhibition ◽  
Self Assembled Monolayers ◽  
Assembled Monolayers ◽  
Self Assembled

Reconfigurable Hydrophobic/Hydrophilic Surfaces Based on Self-Assembled Monolayers

2003 ◽  
Vol 774 ◽  
Author(s):  
Joanne Deval ◽  
Teodoro A. Umali ◽  
Brandee L. Spencer ◽  
Esther H. Lan ◽  
Bruce Dunn ◽  
...  
Keyword(s):  
Contact Angle ◽  
Surface Water ◽  
Water Contact Angle ◽  
Self Assembled Monolayers ◽  
Ionic Surfactant ◽  
Initial Surface ◽  
Lauryl Sulfate ◽  
Water Contact ◽  
Assembled Monolayers ◽  
Self Assembled

AbstractThe fabrication of micron-scale channels and reaction chambers using micromachining techniques has created devices with large surface to volume ratios. As a result, surface properties play a major role in determining the behavior of micromachined devices. In this work, we present strategies that can be used to reconfigure surfaces from hydrophobic to hydrophilic or from hydrophilic to hydrophobic. The reversible nature of the surface is made possible by using deposition and removal of biomolecules or amphiphiles on self-assembled monolayers (SAMs). When the initial surface was hydrophobic (using a CH3-terminated SAM on the surface, water contact angle ∼100), it was rendered hydrophilic (water contact angle ≤60°) using monolayer adsorption of avidin protein. To retrieve the hydrophobicity, the avidin was subsequently removed using non-ionic surfactant octyl-β-D-glucopyranoside. Moreover, by incorporating a biotinylated poly(ethyleneglycol), the avidin-coated surface was resistant to further non-specific adsorption. If the initial surface was hydrophilic (using a CO2H-terminated SAM on the surface, water contact angle ≤20°), it was rendered hydrophobic (water contact angle >90°) using monolayer amphiphilic octadecylamine adsorption. The hydrophilicity was restored after subsequently removing the amphiphile using anionic surfactant sodium lauryl sulfate. Both types of surfaces showed excellent reversibility and demonstrated the ability to control surface wettability.

Sign in / Sign up

Export Citation Format

Share Document