High-resolution scanning transmission electron tomography and elemental analysis of zeptogram quantities of heterogeneous catalyst


Midgley, P.A., Thomas, J.M., Laffont, L.M., Raja, R., Johnson, B.F.G. and Khimyak, T. (2004) High-resolution scanning transmission electron tomography and elemental analysis of zeptogram quantities of heterogeneous catalyst. Journal of Physical Chemistry B, 108, (15), 4590-4592. (doi:10.1021/jp049750b).

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Original Publication URL: http://dx.doi.org/10.1021/jp049750b

Description/Abstract

The ability to visualize the three-dimensional structure of an object is of central importance in many branches of science and engineering. Recording an angular series of two-dimensional projections (images) and subsequently applying tomographic reconstruction methods has proven to be extremely successful at many lengthscales. Using scanning transmission electron microscopy (STEM) high angle annular dark field (HAADF) imaging, we describe how the three-dimensional distribution of bimetallic nanocatalysts (such as Ru10Pt2, diameter ~1 nm, mass 10-21 g) within mesoporous hosts may be precisely determined. Moreover, the simultaneous retrieval of the elemental composition (from electron-stimulated X-ray emission spectra) of individual catalytic nanoparticles was achieved.

Item Type: Article
ISSNs: 1520-6106 (print)
Related URLs:
Keywords: microscopy,z-contrast
Subjects: Q Science
Q Science > QD Chemistry
Divisions: University Structure - Pre August 2011 > School of Chemistry
ePrint ID: 54186
Date Deposited: 31 Jul 2008
Last Modified: 27 Mar 2014 18:37
URI: http://eprints.soton.ac.uk/id/eprint/54186

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