Structure and relaxation processes of an anisotropic molecular fluid confined into 1D nanochannels

TL;DR

This study investigates how confinement within 1D nanochannels affects the structural order and relaxation dynamics of an anisotropic molecular fluid, revealing strong coupling between confinement geometry and molecular behavior.

Contribution

It provides new insights into the anisotropic structural and dynamical properties of liquid crystals confined in one-dimensional porous silicon.

Findings

Confinement induces strong anisotropic order in the liquid crystal.

Molecular reorientations are significantly affected by the 1D confinement.

Structural anisotropy couples with relaxation processes at picosecond timescales.

Abstract

Structural order parameters of a smectic liquid crystal confined into the columnar form of porous silicon are studied using neutron scattering and optical spectroscopic techniques. It is shown that both the translational and orientational anisotropic properties of the confined phase strongly couple to the one-dimensional character of the porous silicon matrix. The influence of this confinement induced anisotropic local structure on the molecular reorientations occuring in the picosecond timescale is discussed.