Experimental approaches to heterogeneous dynamics

Ranko Richert, Nathan Israeloff, Christiane Alba-Simionesco, FranÇois Ladieu, Denis L'Hôte

Research output: Chapter in Book/Report/Conference proceedingChapter

8 Scopus citations

Abstract

Dynamic heterogeneity refers to the independence of fast and slow modes in a system displaying dispersive relaxation and is not an alternative model to the dynamics in complex materials, but rather a required approach for rationalizing an increasing number of experimental results on supercooled liquids. The last twenty years has seen the advent of numerous experimental techniques aimed at studying the heterogeneous nature of viscous liquids. The methods either demonstrate heterogeneity per se, or provide information on the time- and length scale involved in this concept. This chapter reviews the experimental techniques that focus on molecular and polymeric glass formers, the challenges involved, and the results obtained in this relatively new field. Most approaches have particular strengths and weaknesses, so that only the synergistic efforts of combining numerous approaches will advance our understanding of the heterogeneous nature of dynamics significantly.

Original languageEnglish (US)
Title of host publicationDynamical Heterogeneities in Glasses, Colloids, and Granular Media
PublisherOxford University Press
Volume9780199691470
ISBN (Electronic)9780191729799
ISBN (Print)9780199691470
DOIs
StatePublished - Sep 22 2011

Keywords

  • Dynamical heterogeneity
  • Dynamical susceptibility
  • Glass transition
  • Molecular glass
  • Polymer glass

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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