Experimental study of phase separation in films of molecular dimensions

Christenson, Hugo K.; Fang, Jiabin; Israelachvili, Jacob N.

doi:10.1103/physrevb.39.11750

Cited by 50 publications

(42 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Their results are in qualitatively good accord with the theoretical predictions of the author in earlier works. [19][20][21] The thermodynamic theory by Evans and Marini Bettolo Marconi 38 and the experimental evidence reported by Christenson et al [39][40][41] also support these results.…”

Section: B Surface-induced Phase Transitionmentioning

confidence: 66%

Interaction between surfaces with solvophobicity or solvophilicity immersed in solvent: Effects due to addition of solvophobic or solvophilic solute

Kinoshita¹

2003

The Journal of Chemical Physics

View full text Add to dashboard Cite

Integral equation theories with bridge functions incorporated in the closure equations are employed to analyze how the solvent-induced interaction between surfaces is influenced by solute addition to the solvent. The solvent particles interact through a hard-core plus attractive potential. The surfaces are solvophobic or solvophilic, and the solute has rather high solvophobicity or solvophilicity: A total of four combinations of the surface and solute properties are considered. The solute addition always leads to a downward shift, a shift in a more attractive direction, of the surface interaction ͑except at very small surface separations͒. The shift becomes more pronounced as the solute solvophobicity or solvophilicity increases and the solute concentration becomes higher. Overall, the solute effects are the smallest when the solute is neither solvophobic nor solvophilic. The physical origins of the shift are discussed in detail by relating the interaction to the structure of the solventsolute mixture confined between two surfaces.

show abstract

Section: B Surface-induced Phase Transitionmentioning

confidence: 66%

Interaction between surfaces with solvophobicity or solvophilicity immersed in solvent: Effects due to addition of solvophobic or solvophilic solute

Kinoshita¹

2003

The Journal of Chemical Physics

View full text Add to dashboard Cite

show abstract

“…2 Greberg and Patey found the same phenomenon, a surface-induced demixing transition, in simulations of a model twocomponent liquid containing spherical molecules with Lennard-Jones interactions. If this liquid is confined between mica surfaces, which are hydrophilic, when the surfaces are brought to within a critical separation a waterrich phase condenses between the surfaces and large attractive forces appear which pull the surfaces together.…”

Section: Introductionmentioning

confidence: 65%

Shearing of nanoscopic bridges in two-component thin liquid layers between chemically patterned walls

Hemming

Patey

2004

The Journal of Chemical Physics

View full text Add to dashboard Cite

Bridge phases associated with a phase transition between two liquid phases occur when a two-component liquid mixture is confined between chemically patterned walls. In the bulk the liquid mixture with components A, B undergoes phase separation into an A-rich phase and a B-rich phase. The walls bear stripes attractive to A. In the bridge phase A-rich and B-rich regions alternate. Grand canonical Monte Carlo studies are performed with the alignment between stripes on opposite walls varied. Misalignment of the stripes places the nanoscopic liquid bridges under shear strain. The bridges exert a Hookean restoring force on the walls for small displacements from equilibrium. As the strain increases there are deviations from Hooke's law. Eventually there is an abrupt yielding of the bridges. Molecular dynamics simulations show the bridges form or disintegrate on time scales which are fast compared to wall motion and transport of molecules into or from the confined space. Some interesting possible applications of the phenomena are discussed.

show abstract

“…It seems unnecessary to invoke condensation of water from an undersaturated atmosphere when there is a reservoir of water in films adsorbed to the tip and sample surfaces. In the SFA experiments comparisons were also made between the formation of water condensates in OMCTS confined between K-mica and H-mica surfaces [124]. The condensates were observed to form at slightly larger separations with the K-mica surfaces and it was suggested that this was due to a greater affinity of water for the potassium mica due to the surface K + .…”

Section: Mica and The Surface Force Apparatusmentioning

confidence: 99%

The nature of the air-cleaved mica surface

Christenson

Thomson

2016

Surface Science Reports

Self Cite

111

102

View full text Add to dashboard Cite

The accepted image of muscovite mica is that of an inert and atomically smooth surface, easily prepared by cleavage in an ambient atmosphere. Consequently, mica is extensively used a model substrate in many fundamental studies of surface phenomena and as a substrate for AFM imaging of biomolecules. In this review we present evidence from the literature that the above picture is not quite correct. The mica used in experimental work is almost invariably cleaved in laboratory air, where a reaction between the mica surface, atmospheric CO2 and water occurs immediately after cleavage. The evidence suggests very strongly that as a result the mica surface becomes covered by up to one formula unit of K2CO3 per nm 2 , which is mobile under humid conditions, and crystallizes under drier conditions. The properties of mica in air or water vapour cannot be fully understood without reference to the surface K2CO3, and many studies of the structure of adsorbed water on mica surfaces may need to be revisited. With this new insight, however, the air-cleaved mica should provide exciting opportunities to study phenomena such as two-dimensional ion diffusion, electrolyte effects on surface conductivity, and two-dimensional crystal nucleation.

show abstract

Experimental study of phase separation in films of molecular dimensions

Cited by 50 publications

References 29 publications

Interaction between surfaces with solvophobicity or solvophilicity immersed in solvent: Effects due to addition of solvophobic or solvophilic solute

Interaction between surfaces with solvophobicity or solvophilicity immersed in solvent: Effects due to addition of solvophobic or solvophilic solute

Shearing of nanoscopic bridges in two-component thin liquid layers between chemically patterned walls

The nature of the air-cleaved mica surface

Contact Info

Product

Resources

About