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A New Method for Determining the Composition of Core–Shell Nanoparticles via Dual‐EDX+EELS Spectrum Imaging
Author(s) -
Rossouw David,
Knappett Benjamin R.,
Wheatley Andrew E. H.,
Midgley Paul A.
Publication year - 2016
Publication title -
particle and particle systems characterization
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.877
H-Index - 56
eISSN - 1521-4117
pISSN - 0934-0866
DOI - 10.1002/ppsc.201600096
Subject(s) - bimetallic strip , nanoparticle , microanalysis , shell (structure) , spectroscopy , electron energy loss spectroscopy , materials science , energy dispersive x ray spectroscopy , core (optical fiber) , composition (language) , electron probe microanalysis , component (thermodynamics) , electron , analytical chemistry (journal) , chemistry , scanning electron microscope , nanotechnology , transmission electron microscopy , physics , metal , linguistics , philosophy , organic chemistry , chromatography , quantum mechanics , metallurgy , composite material , thermodynamics
Simultaneously acquired microanalytical X‐ray and electron energy loss signals are obtained from a bimetallic core–shell nanoparticle system (FePt@Fe 3 O 4 ). 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 nanoheterostructure. 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.