Online citations, reference lists, and bibliographies.
← Back to Search

Concentration-driven Surface Transition In The Wetting Of Mixed Alkanethiol Monolayers On Gold

A. Ulman, S. Evans, Y. Shnidman, R. Sharma, J. Eilers, J. Chang
Published 1991 · Chemistry

Cite This
Download PDF
Analyze on Scholarcy
The construction of mixed monolayers containing hydrophobic and hydrophilic components for which the contact angles for three different liquids vary as a highly nonlinear function of the monolayer composition is reported. It is suggested that a prewetting, crystalline-like layer of water, possibly formed from bulk vapor, is present near the hydrophilic surface, because of an enhanced surface chemical potential ("surface field"). As the concentration of the hydrophilic component is lowered, increasing "quenched randomness" in the distribution of surface fields destroys the surface condensed water phase, thus triggering the observed nonlinearity in the contact angles. The microscopic structure of the water molecules adsorbed on an OH surface is revealed by continuum Monte Carlo simulations, with realistic force fields, and the scenario is supported by mean-field calculations on a simplified lattice-gas model. The observed wetting behavior at 30% relative humidity was altered for a relative humidity 52%, as well as when the surface of the monolayer was molecularly roughened by the addition of two CH2 groups to the hydrophobic (CH,-terminated) component of the mixed monolayers. It is suggested that this transitional phenomenon is due to a possible (true or rounded) surface phase transition, due to the formation of a prewetting water layer. This formation is triggered by variations in the quenched distribution of random surface fields.
This paper references

This paper is referenced by
Multilayers of ω-mercaptoalkanoic acids containing a polar aromatic group: characterization of films
T. Freeman (1994)
Analysis of self-assembled monolayers by thermal desorption mass spectrometry: neighborhood interaction and hydrogen/deuterium exchange.
T. Shibue (2004)
Mixed alkanethiolate monolayers as substrates for studying the Langmuir film deposition process
S. D. Evans (1994)
Surface-confined monomers on electrode surfaces Part 3. Electrochemical reactions and scanning probe microscopy investigations of ω-(N-pyrrolyl) alkanethiol self-assembled monolayers on gold
R. J. Willicut (1995)
Improvement of alternariol monomethyl ether detection at gold electrodes modified with a dodecanethiol self-assembled monolayer
M. B. Moressi (2004)
Discrete membrane arrays.
Y. Cheng (2000)
Solvent-responsive properties of octadecyltrichlorosiloxane nanostructures investigated using atomic force microscopy in liquid.
Shalaka A Kulkarni (2014)
Guest selective adsorption from the gas phase onto a functional self-assembled monolayer immobilized on a super-sensitive quartz-crystal microbalance
K. Matsuura (1996)
Electrochemical quartz crystal microbalance study of covalent tethering of carboxylated thiol to polyaniline for electrocatalyzed oxidation of ascorbic acid in neutral aqueous solution.
Zhaohong Su (2009)
A. Ulman (1991)
Adsorption of 3-mercaptopropyltrimethoxysilane and 3-aminopropyltrimethoxysilane at platinum electrodes
R. Brito (2002)
Electrochemical Behavior of Epinephrine at Two‐Component Self‐Assembled Monolayer of meso‐2,3‐Dimercaptosuccinic Acid and Penicillamine on Gold Electrode
Y. B. He (2007)
Critical issues in applications of self-assembled monolayers
D. Allara (1995)
Self-assembled monolayers of rigid thiols.
A. Ulman (2000)
Chemically Patterned Surfaces as Test Platforms to Study Magnetic and Solvent-Responsive Properties at the Nanoscale: Investigations Using Scanning Probe Microscopy
Shalaka A Kulkarni (2015)
Contact angles and surface forces
N. Churaev (1995)
Self-Assembled Thin Films: Peptides in Hybrid Bilayers and Mixed Organosilanes on Silica
M. B. Smith (2008)
Blocking temperatures of amorphous iron nanoparticles coated by various surfactants
G. Kataby (2002)
Corrosion Behaviors on Polycrystalline Gold Substrates in Self‐Assembled Processes of Alkanethiol Monolayers
Z. Cao (2005)
Use of the laser-desorption technique for the preparation of a mixed-thiol monolayer on a gold electrode
K. Takehara (1992)
Simulations of Microscopic Wetting Phenomena on Self-Assembled Monolayers.
J. Hautman (1991)
Wide-range work function tuning in gold surfaces modified with fluorobenzenethiols toward application to organic thin-film transistors
Takumi Yoshioka (2020)
A Simple Nanocellulose Coating for Self-Cleaning upon Water Action: Molecular Design of Stable Surface Hydrophilicity.
S. Huang (2017)
Gold nanoparticles chemisorbed by a terphenyldithiol self-assembled monolayer for fabrication of a protein biosensor
N. Al-Rawashdeh (2011)
Self-assembled functional organic monolayers on oxide-free copper.
Mabel A. Caipa Campos (2011)
Electrochemical studies of the terminally substituted alkanethiol monolayers formed on a gold electrode: Effects of the terminal group on the redox responses of Fe(CN)3−6, Ru(NH3)3+6 and ferrocenedimethanol
K. Takehara (1994)
Progress on molecular self-assembly of alkanethiols
Wenli Deng (1998)
Modification of thiol-derived self-assembling monolayers by electron and x-ray irradiation: Scientific and lithographic aspects
M. Zharnikov (2002)
Wetting of low-energy surfaces.
N. Churaev (2007)
The Effect of Terminal Hydrogen Bonding on the Structure and Dynamics of Nanoparticle Self-Assembled Monolayers (SAMs): An NMR Dynamics Study.
H. Schmitt (1998)
Physical Chemistry of Wetting Phenomena
N. V. Churaev (2011)
Voltammetry at 115-180 K for Self-Assembled Ferrocene-Tagged Alkanethiol Monolayers on Gold and Silver Electrodes in Butyronitrile/ethyl Chloride Solvent
L. S. Curtin (1993)
See more
Semantic Scholar Logo Some data provided by SemanticScholar