Prabhu, V.
, Venkataraman, S.
, , Y.
and Hedrick, J.
(2015),
Equilibrium Self-Assembly, Structure, and Dynamics of Clusters of Star-Like Micelles, ACS Macro Letters, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=918800
(Accessed May 19, 2024)
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Equilibrium Self-Assembly, Structure, and Dynamics of Clusters of Star-Like Micelles
Published
Author(s)
, Shrinivas Venkataraman, Yi Yan Yang, James Hedrick
Abstract
Small-angle neutron scattering and static and dynamic light scattering have characterized the hierar-chical structure and dynamics of clusters of self-assembled star-like micelles formed by oligocarbonate-fluorene func-tionalized polyethylene glycol triblock copolymers below the gelation point. The micelles persist in equilibrium with concentration-dependent sized clusters. When probed at length scales within the clusters by dynamic light scattering, the finite-sized clusters exhibit Zimm dynamics, reminiscent of dilute mesoscale chains of micelles, similar to worm-like micelles formed by surfactants. We attribute the ability to form chain-like clusters due the specific pi-pi stacking of the oligocarbonate-fluorene groups displayed by the star-like micelles. The deviations in the local solvent (D2O) viscosity, calculated by the Stokes-bead monomeric friction coefficient, are consistent with an established literature for polymers in organic solvents.Citation
ACS Macro Letters
Pub Type
Journals
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Keywords
triblock copolymer, star-like micelle, cluster, neutron scattering, light scattering
Citation
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Created October 17, 2015, Updated August 1, 2019