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

作者：Anoardo Esteban^*

来源：Comptes Rendus Physique, 2010, 11(2): 160-171.

DOI：10.1016/j.crhy.2010.06.017

• Ultrasound
• NMR relaxation
• Relaxometry
• Field-cycling
• Nematic
• Smectic
• Relaxation dispersion

A salient characteristic of nuclear magnetic resonance (NMR) techniques is the possibility to scan nuclear spin evolutions within a broad Larmor frequency range. Special instrumentation was developed to extend nuclear spin relaxation studies up to proton Larmor frequencies 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 is selectively subjected to ultrasonic irradiation. The fact that ultrasound couples selectively to the collective dynamics of liquid crystals, offers new insights for the study of the molecular dynamics in these materials using NMR relaxation.

• 出版日期2010-3