Related Experiment Video
Updated: Aug 23, 2026

The Mechanics of (Poro-)Elastic Contractile Actomyosin Networks As a Model System of the Cell Cytoskeleton
Published on: March 10, 2023
Structure of liquid and glassy methanol confined in cylindrical pores
Denis Morineau1, Regis Guegan, Yongde Xia
1Laboratoire de Chimie Physique, CNRS-UMR 8000, Batiment 349, Universite de Paris-Sud, F-91405 Orsay, FranceGroupe Matiere Condensee et Materiaux, CNRS-UMR 6626, Batiment 11A, Universite de Rennes 1, F-35042 Rennes, France. denis.morineau@univ-rennes1.fr
Abstract:
We present a neutron scattering analysis of the density and the static structure factor of confined methanol at various temperatures. Confinement is performed in the cylindrical pores of MCM-41 silicates with pore diameters D=24 and 35 A. A change of the thermal expansivity of confined methanol at low temperature is the signature of a glass transition, which occurs at higher temperature for the smallest pore. This is evidence of a surface induced slowing down of the dynamics of the fluid. The structure factor presents a systematic evolution with the pore diameter, which has been analyzed in terms of excluded volume effects and fluid-matrix cross correlation. Conversely to the case of Van der Waals fluids, it shows that stronger fluid-matrix correlations must be invoked most probably in relation with the H-bonding character of both methanol and silicate surface.
Related Concept Videos
Molecular Comparison of Gases, Liquids, and Solids
Surface Tension, Capillary Action, and Viscosity
The various IMFs between identical molecules of a substance are examples of cohesive forces. The molecules within a liquid are surrounded by other molecules and are attracted equally in all directions by the cohesive forces within the liquid. However, the molecules on the surface of a liquid are attracted only by about one-half as many molecules. Because of the unbalanced molecular attractions on the surface molecules, liquids contract to form a shape that minimizes the number...
Vapor Pressure
Intermolecular Forces and Physical Properties
Fluid Mosaic Model

