Application of field-cycling NMR relaxometry to the study of ultrasound-induced effects in the molecular dynamics and order of mesomorphic materials

ESTEBAN ANOARDO

COMPTES RENDUS PHYSIQUE

ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER

Año: 2010 p. 1 - 12

1631-0705

A salient characteristic of nuclear magnetic resonance (NMR) techniques is the possibilityto scan nuclear spin evolutions within a broad Larmor frequency range. Special instrumentationwas developed to extend nuclear spin relaxation studies up to proton Larmorfrequencies in the sub-kilohertz regime, a technique known as field-cycling NMR relaxometry.This article refers to an experimental version where the sample under study isselectively subjected to ultrasonic irradiation. The fact that ultrasound couples selectivelyto the collective dynamics of liquid crystals, offers new insights for the study of the moleculardynamics in these materials using NMR relaxation.