Publication

Water adsorption on etched hydrophobic surfaces of L-, D- and DL-valine crystals

2014
Journal Articles

Abstract

The adsorption of water on etched (001) surfaces of L-, D- and DL-valine crystals has been characterized by atomic force microscopy (AFM) using different operational modes (contact, non-contact and electrostatic) above and below the dew point, the temperature at which water vapor from humid air condenses into liquid water at constant atmospheric pressure. The analysis of the images suggests the formation of aggregates of solvated valine molecules that easily diffuse on the hydrophobic terraces only constrained by step barriers of the well-defined chiral parallelepipedic patterns induced by the etching process. (C) 2013 Elsevier B.V. All rights reserved.

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https://infoscience.epfl.ch/entities/publication/2e785f80-c412-492e-990e-6e8c9c35aedc

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2014
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/2e785f80-c412-492e-990e-6e8c9c35aedc

About this result

Related concepts (32)

Water vapor

Water vapor, water vapour or aqueous vapor is the gaseous phase of water. It is one state of water within the hydrosphere. Water vapor can be produced from the evaporation or boiling of liquid water or from the sublimation of ice. Water vapor is transparent, like most constituents of the atmosphere. Under typical atmospheric conditions, water vapor is continuously generated by evaporation and removed by condensation. It is less dense than most of the other constituents of air and triggers convection currents that can lead to clouds and fog.

Vapor pressure

Vapour pressure or equilibrium vapor pressure is the pressure exerted by a vapor in thermodynamic equilibrium with its condensed phases (solid or liquid) at a given temperature in a closed system. The equilibrium vapor pressure is an indication of a liquid's thermodynamic tendency to evaporate. It relates to the balance of particles escaping from the liquid (or solid) in equilibrium with those in a coexisting vapor phase. A substance with a high vapor pressure at normal temperatures is often referred to as volatile.

Vapor

In physics, a vapor (American English) or vapour (British English and Canadian English; see spelling differences) is a substance in the gas phase at a temperature lower than its critical temperature, which means that the vapor can be condensed to a liquid by increasing the pressure on it without reducing the temperature of the vapor. A vapor is different from an aerosol. An aerosol is a suspension of tiny particles of liquid, solid, or both within a gas.

Related publications (32)

Water adsorption on etched hydrophobic surfaces of L-, D- and DL-valine crystals

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