Detecting Branching in Wormlike Micelles via Dynamic Scattering Methods

Michelle A. Calabrese, Norman J. Wagner

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

Topological differences in a model series of wormlike micelles (WLMs) with varying degrees of branching are investigated via neutron spin echo (NSE) and dynamic light scattering (DLS). Branching was previously verified via microscopy, scattering methods, and rheology. NSE measurements reveal that on the shortest length scales, where WLMs are topologically similar, the dynamic behavior is independent of branching level. However, branching leads to deviations from wormlike chain behavior on length scales relevant to branching. These differences continue into the DLS regime, where two relaxation modes are observed. While measuring micellar branching is challenging, our measurements of segmental dynamics provide a direct dynamic measurement of WLM branching and demonstrate promise for future identification of topological changes in self-assembled materials.

Original languageEnglish (US)
Pages (from-to)614-618
Number of pages5
JournalACS Macro Letters
Volume7
Issue number6
DOIs
StatePublished - Jun 19 2018
Externally publishedYes

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