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Probing the Structure of the Crystalline Core of Field-Aligned, Monodisperse, Cylindrical Polyisoprene-block-Polyferrocenylsilane Micelles in Solution Using Synchrotron Small- and Wide-Angle X-ray Scattering

DOI: 10.1021/ja207417z DOI Help

Authors: Joe Gilroy (University of Bristol) , Paul Rupar (University of Bristol) , George Whittell (University of Bristol) , Laurent Chabanne (University of Bristol) , Nicholas Terrill (Diamond Light Source) , Mitchell Winnik (University of Toronto) , Ian Manners (University of Bristol) , Robert Richardson (University of Bristol)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Journal Of The American Chemical Society , VOL 133 (42) , PAGES 17056-17062

State: Published (Approved)
Published: October 2011
Diamond Proposal Number(s): 6035

Abstract: The self-assembly of block copolymers in selective solvents represents a powerful approach to functional core–shell nanoparticles. Crystallization of the core can play a critical role in directing self-assembly toward desirable, nonspherical morphologies with low mean interfacial curvature. Moreover, epitaxial growth processes have been implicated in recent advances that permit access to monodisperse cylinders, cylindrical block comicelles with segmented cores and/or coronas, and complex hierarchical architectures. However, how the core-forming block crystallizes in an inherently curved nanoscopic environment has not been resolved. Herein we report the results of synchrotron small-angle X-ray scattering (SAXS) and wide-angle X-ray scattering (WAXS) studies of well-defined, monodisperse crystalline-coil polyisoprene-block-polyferrocenylsilane cylindrical micelles aligned in an electric field. WAXS studies of the aligned cylinders have provided key structural information on the nature of the PFS micelle core together with insight into the role of polymer crystallinity in the self-assembly of these and potentially related crystalline-coil block copolymers.

Subject Areas: Chemistry

Instruments: I22-Small angle scattering & Diffraction

Added On: 05/12/2011 15:09

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