Search results for "Domain formation"

showing 3 items of 3 documents

Simulation of Reaction-Induced Phase Separation in Surface Alloy

2008

Using kinetic Monte Carlo method we simulate the dynamics of biatomic Au0.3Ni0.7 surface alloy separation on Ni(111) due to Ni(CO)4 out-reaction. The experiment of Vestergaard et al. is modeled by counterbalancing dynamical processes and interactions between reactants. The simulations demonstrate step flow rate increase with CO coverage, cCO, in qualitative agreement with the experiment only for cCO <∼ 0.45 monolayer. Moreover, we demonstrate both CO influence on reaction process and Au domain formation.

Surface (mathematics)Materials scienceMonolayerAlloyengineeringGeneral Physics and AstronomyThermodynamicsKinetic Monte Carloengineering.materialVolumetric flow rateDomain formationActa Physica Polonica A
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Epifluorescence microscopy studies of fatty acid monolayers: Domain formation induced by polymeric gegenions

1991

The monolayer behavior of long-chain fatty acids at the air/water interface on a poly(ethyleneimine) containing subphase was investigated. The interaction of the polymeric gegenions in the subphase leads to expanded states and permits the visualization of the aggregation behavior of different long-chain fatty acids via fluorescence microscopy. The monolayer morphologies and their variability were intensively studied by fluorescence microscopy. In addition, the transfer of the complexed fatty acid monolayers to solid substrates has been investigated.

chemistry.chemical_classificationPolymers and PlasticschemistryChemical engineeringOrganic ChemistryMonolayerMaterials ChemistryFluorescence microscopeEthyleneimineFatty acidOrganic chemistryCondensed Matter PhysicsDomain formationMakromolekulare Chemie. Macromolecular Symposia
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Domain formation in monolayers

1995

For phospholipids at the air/water interface we demonstrate that molecular chirality in some, but not in all, cases influences the domain shapes. In other cases chirality in the head group region can cause a chiral structure considering the tail arrangement. This indicates head group ordering. Minute changes of the molecular structure may change domain morphology from circular to dendritic. This can be related to slight changes of the lattice structure. In case of a dendritic domain the chains are more tilted, the deviation from hexagonal symmetry is more pronounced, and hence the lattice anisotropy is larger. This can be understood also in view of recent simulations considering diffusion-l…

inorganic chemicalsMacromolecular SubstancesSurface PropertiesHigh Energy Physics::LatticeBiophysicsBiophysical PhenomenaDomain formationMonolayerpolycyclic compoundsheterocyclic compoundsMolecular BiologyPhospholipidsPhysics::Atmospheric and Oceanic PhysicsSurface diffusionMolecular StructureChemistryorganic chemicalsHigh Energy Physics::PhenomenologyWaterStereoisomerismCell BiologyCrystallographyMicroscopy FluorescenceDomain (ring theory)health occupationsChirality (chemistry)OilsMolecular Membrane Biology
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