HAL will be down for maintenance from Friday, June 10 at 4pm through Monday, June 13 at 9am. More information
Skip to Main content Skip to Navigation
Preprints, Working Papers, ...

Structure of liquid and glassy methanol confined in cylindrical pores

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 angstrom and D=35 angstrom. 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 an 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.
Complete list of metadata

Cited literature [18 references]  Display  Hide  Download

Contributor : Denis Morineau Connect in order to contact the contributor
Submitted on : Friday, March 12, 2004 - 4:41:05 PM
Last modification on : Friday, December 10, 2021 - 3:46:44 AM
Long-term archiving on: : Friday, June 11, 2010 - 11:23:52 AM



Denis Morineau, Régis Guégan, Yongde Xia, Christiane Alba-Simionesco. Structure of liquid and glassy methanol confined in cylindrical pores. 2004. ⟨hal-00001284⟩



Record views


Files downloads