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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
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 | ||||
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| Subjects: | Q Science > QC Physics Q Science > QD Chemistry |
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| Divisions: | Faculty of Science > Chemistry Faculty of Science > Physics |
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| 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: |
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| 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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