Anchoring of alkylphosphonic derivatives molecules on copper oxide surfaces

Fonder, Gregory J.; Minet, Isabelle; Volcke, Cédric; Devillers, Sébastien; Delhalle, Joseph; Mekhalif, Zineb

doi:10.1016/j.apsusc.2011.02.071

Cited by 43 publications

(27 citation statements)

References 37 publications

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“…[8][9][10][11] Due to the strong binding between sulfur and copper atoms, alkanethiol SAMs formed on nonoxidized copper surface have better protective properties compared to those formed on copper oxides. 11 In contrast to SAMs of alkanethiols, long-chain organic acids, such as carboxylic, [12][13][14][15][16][17][18][19][20] hydroxamic 15,21,22 or phosphonic 15,[23][24][25][26][27] acids bind strongly to oxidized surfaces of metals and alloys, which is an advantage for their practical application as most of the commercially important metals and alloys readily get covered by thin oxide layers when exposed to air. The other advantage of long-chain organic acids, especially carboxylic acids is that they are non-toxic.…”

mentioning

confidence: 99%

The Influence of Thickness of Stearic Acid Self-Assembled Film on Its Protective Properties

Gretić

Mioč

Čadež

et al. 2016

J. Electrochem. Soc.

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Self-assembled mono-and multilayers of stearic acid have been examined as corrosion protection systems for copper-nickel alloy in 3% sodium chloride solution. We found that self-assembled multilayers of stearic acid provide more efficient and durable corrosion protection to copper-nickel alloy than just a single monolayer. Electrochemical techniques, such as potentiodynamic polarization and electrochemical impedance spectroscopy, were used to determine the protective properties of the stearic acids films. Sum frequency generation spectroscopy, atomic force microscopy, contact angle measurements and ellipsometry were used to evaluate structural properties and thickness of the surface layers. It was found that the increase of corrosion protection from mono-to multilayer films depends on the number of layers that are formed but also on their homogeneity.

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mentioning

confidence: 99%

The Influence of Thickness of Stearic Acid Self-Assembled Film on Its Protective Properties

Gretić

Mioč

Čadež

et al. 2016

J. Electrochem. Soc.

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“…This indicates the chemical reaction between the Si-OH group of APTHS and a hydroxyl group of DDPA, whose products can be absorbed on the alloy surface. Amplification of the peaks' intensity as well as "deformation" of some peaks in the FTIR spectra (in the case of the alloy surface) can be explained by overlapping APTHS peaks with those of DDPA in the area of wavenumbers from 1200-950 cm −1 attributed to P-O stretching [47,48]. From obtained FTIR spectra it can be concluded presence of DDPA SAM and APTHS on the surface layer.…”

Section: The Modification Of the Pretreatment Film By Ni-p Coatingmentioning

confidence: 81%

“…For comparison, the impedance spectra of pure nickel, recorded at the same conditions, is presented (inset of Figure 5A). As can be seen, the Nyquist plot shows a capacitive semicircle which is not "closed", and which crosses the straight line at an angle of 45°, indicating the presence of the Warburg impedance characteristic for the process of diffusion [48]. When comparing FTIR spectra of the AZ91D alloy surface (modified with DDPA SAM and APTHS) and pure APTHS, peaks at very similar wavenumbers ( Figure 4A) can be observed.…”

Section: The Modification Of the Pretreatment Film By Ni-p Coatingmentioning

confidence: 82%

“…Two broad bands in the FTIR spectrum of DDPA powder of weak to medium-strong intensity at 2700-2500 cm −1 and 2300-2100 cm −1 are because of the O-H stretching characteristic for compounds which contain a P-OH group [47,48]. The peak of low intensity in the FTIR spectrum of AZ91D alloy with DDPA SAM at a wavenumber of about 2300 cm −1 confirms the presence of free P-OH groups in DDPA SAM.…”

Section: Optimization Of the Pretreatment Parameters For The Formatiomentioning

confidence: 90%

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Effective and Environmentally Friendly Nickel Coating on the Magnesium Alloy

Rončević

Buzuk

Vladislavić

2016

Metals

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Abstract:The low density and good mechanical properties make magnesium and its alloys attractive construction materials in the electronics, automotive, and aerospace industry, together with application in medicine due to their biocompatibility. Magnesium AZ91D alloy is an alloy with a high content of aluminum, whose mechanical properties overshadow the low corrosion resistance caused by the composition of the alloy and the existence of two phases: α magnesium matrix and β magnesium aluminum intermetallic compound. To improve the corrosion resistance, it is necessary to find an effective protection method for the alloy surface. Knowing and predicting electrochemical processes is an essential for the design and optimization of protective coatings on magnesium and its alloys. In this work, the formations of nickel protective coatings on the magnesium AZ91D alloy surface by electrodeposition and chemical deposition, are presented. For this purpose, environmentally friendly electrolytes were used. The corrosion resistance of the protected alloy was determined in chloride medium using appropriate electrochemical techniques. Characterization of the surface was performed with highly sophisticated surface-analytical methods.

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“…It was reported that alkane phosphonic acid molecules bind covalently to the oxide surface (Helmy & Fadeev 2002). The bonding mode (eg monodentate, bidentate or tridentate) however highly depends on the substrate (Fonder et al 2011). It was showed that the water contact angle of copper oxide modified with a self-assembled monolayer of octadecylphosphonic acid is higher than 140° (Hoque et al 2009).…”

Section: Introductionmentioning

confidence: 99%

Adsorption of a PEO–PPO–PEO triblock copolymer on metal oxide surfaces with a view to reducing protein adsorption and further biofouling

et al. 2013

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Biomolecule adsorption is the first stage of biofouling. The aim of this work is to reduce protein adsorption on stainless steel and titanium surfaces by modifying them with a poly(ethylene oxide) (PEO)-poly(propylene oxide) (PPO)-PEO triblock copolymer.Anchoring of the central PPO block of the copolymer is known to be favored by hydrophobic interaction with the substrate. Therefore, the metal oxide surfaces were first modified by self-assembly of octadecylphosphonic acid (OPA). PEO-PPO-PEO preadsorbed on the hydrophobized titanium or stainless steel was shown to prevent bovine serum albumin (BSA), fibrinogen and cytochrome C adsorption, as was monitored by quartz crystal microbalance (QCM). Moreover, X-ray photoelectron spectroscopy (XPS) and time-of-flight secondary ion mass spectrometry (ToF-SIMS) were used to characterize stainless steel and titanium surfaces after competitive adsorption of PEO-PPO-PEO and BSA. The results show that BSA adsorption is well prevented on hydrophobized surfaces, in contrast to native metal oxide surfaces.

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Anchoring of alkylphosphonic derivatives molecules on copper oxide surfaces

Cited by 43 publications

References 37 publications

The Influence of Thickness of Stearic Acid Self-Assembled Film on Its Protective Properties

The Influence of Thickness of Stearic Acid Self-Assembled Film on Its Protective Properties

Effective and Environmentally Friendly Nickel Coating on the Magnesium Alloy

Adsorption of a PEO–PPO–PEO triblock copolymer on metal oxide surfaces with a view to reducing protein adsorption and further biofouling

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