A New Method for Determining the Composition of Core–Shell Nanoparticles via Dual-EDX+EELS Spectrum Imaging


Type
Article
Change log
Authors
Rossouw, D 
Knappett, BR 
Wheatley, AEH 
Midgley, PA 
Abstract

Simultaneously acquired microanalytical X-ray and electron energy loss signals are obtained from a bimetallic core–shell nanoparticle system (FePt@Fe3O4). The signals are decomposed using independent component analysis and the extracted components are used to separately quantify the composition of the spatially overlapping core and shell phases in the nano-heterostructure. The utilization of the complementary strengths of energy dispersive X-ray and electron energy-loss spectroscopy microanalysis has enabled the quantification of both light and heavy elements in a single spectrum image acquisition.

Description
Keywords
core-shell, EDX, EELS, ICA, nanoparticles
Journal Title
Particle and Particle Systems Characterization
Conference Name
Journal ISSN
0934-0866
1521-4117
Volume Title
Publisher
Wiley
Sponsorship
European Research Council (291522)
European Commission (312483)
D.R. acknowledges support from the Royal Society’s Newton International Fellowship scheme. P.A.M acknowledges financial support from the European Research Council under the European Union’s Seventh Framework Programme (FP7/ 2007-2013)/ERC grant agreement 291522-3DIMAGE. P.A.M. also acknowledges financial support from the European Union’s Seventh Framework Programme of the European Commission: ESTEEM2, contract number 312483. B.R.K. thanks the UK EPSRC for financial support (EP/J500380/1).
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