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A new approach to high resolution, high contrast electron microscopy of macromolecular block copolymer assemblies

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Dyson, Mark Adam, Sánchez, Ana M., Patterson, Joseph P., O'Reilly, Rachel K., Sloan, Jeremy and Wilson, Neil R. (2013) A new approach to high resolution, high contrast electron microscopy of macromolecular block copolymer assemblies. Soft Matter, Volume 9 (Number 14). pp. 3741-3749. doi:10.1039/c3sm27787a

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Official URL: http://dx.doi.org/10.1039/C3SM27787A

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Abstract

Determining the structure of macromolecular samples is vital for understanding and adapting their function. Transmission electron microscopy (TEM) is widely used to achieve this, but, owing to the weak electron scattering cross-section of carbon, TEM images of macromolecular samples are generally low contrast and low resolution. Here we implement a fast and practically simple routine to achieve high-contrast imaging of macromolecular samples using exit wave reconstruction (EWR), revealing a new level of structural detail. This is only possible using ultra-low contrast supports such as the graphene oxide (GO) used here and as such represents a novel application of these substrates. We apply EWR on GO membranes to study self-assembled block copolymer structures, distinguishing not only the general morphology or nanostructure, but also evidence for the substructure (i.e. the polymer chains) which gives insight into their formation mechanisms and functional properties.

Item Type: Journal Article
Subjects: Q Science > QC Physics
Q Science > QD Chemistry
Divisions: Faculty of Science > Chemistry
Faculty of Science > Physics
Library of Congress Subject Headings (LCSH): Electron microscopy, High resolution electron microscopy, Block copolymers
Journal or Publication Title: Soft Matter
Publisher: Royal Society of Chemistry
ISSN: 1744-683X
Official Date: 2013
Dates:
DateEvent
2013Published
Volume: Volume 9
Number: Number 14
Page Range: pp. 3741-3749
DOI: 10.1039/c3sm27787a
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access
Funder: Engineering and Physical Sciences Research Council (EPSRC), Advantage West Midlands (AWM), Higher Education Funding Council for England (HEFCE), University of Warwick
Grant number: EP/F034210/1 (EPSRC)

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