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Estimation of cobalt coating layer thickness on acicular Fe 3 O 4 powder using HR‐TEM
Author(s) -
Sakai Keitarou,
Saguchi Hiroto,
Nishimura Tadashi
Publication year - 2001
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s0021889800020495
Subject(s) - acicular , crystallite , coating , materials science , transmission electron microscopy , cobalt , layer (electronics) , high resolution transmission electron microscopy , mineralogy , composite material , analytical chemistry (journal) , crystallography , metallurgy , microstructure , nanotechnology , chemistry , chromatography
The thicknesses of cobalt coating layers grown on four different types of acicular Fe 3 O 4 particles were estimated from the analysis of lattice images and from the determination of the Co depth profile using high‐resolution transmission electron microscopy (HR‐TEM) coupled with an energy dispersive X‐ray (EDX) analysis system. It was observed that the coating thickness might vary with the crystallite size resulting from the growth mechanism of the coating layer. In this study, two different layer thicknesses, 40 Å and less than 10 Å, were evidenced for crystallite sizes of 390 Å and 350 Å, respectively.