Selective imaging of discrete polyoxometalate ions on graphene oxide under variable voltage conditions

Bosch-Navarro, Concha, Perkins, Laura M., Kashtiban, Reza J., Rourke, Jonathan P. ORCID: https://orcid.org/0000-0002-8961-1021, Shannon, Ian J. and Sloan, Jeremy 2016. Selective imaging of discrete polyoxometalate ions on graphene oxide under variable voltage conditions. ACS Nano 10 (1) , pp. 796-802. 10.1021/acsnano.5b05898

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Abstract

Monosubstituted lacunary Keggin [CoSiW11O39]6– ions on graphene oxide (GO) were used in a comparative imaging study using aberration corrected transmission electron microscopy at two different acceleration voltages, 80 and 200 kV. By performing a set of static and dynamical studies, together with image simulations, we show how the use of lower voltages results in better stability and resolution of the underlying GO support while the use of higher voltages permits better resolution of the individual tungsten atoms and leads to less kinetic motion of the cluster, thus leading to a more accurate identification of cluster orientation and better stability under dynamical imaging conditions. Applying different voltages also influences the visibility of both GO and the lighter Co at lower or higher voltages, respectively

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Chemistry
Publisher:	American Chemical Society
ISSN:	1936-0851
Date of Acceptance:	29 December 2015
Last Modified:	23 Dec 2022 02:09
URI:	https://orca.cardiff.ac.uk/id/eprint/118454

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