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Homogeneity of lanthanide doped ceria nanocrystal dispersions using high-resolution transmission electron microscopy

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UNSPECIFIED (2001) Homogeneity of lanthanide doped ceria nanocrystal dispersions using high-resolution transmission electron microscopy. JOURNAL OF NANOPARTICLE RESEARCH, 3 (5-6). pp. 433-441. ISSN 1388-0764.

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Abstract

Aqueous sols of crystalline solid solutions of the general formula Ce(1-x)Ln(x)O(2-x/2)square(x/2) [Ln = entire lanthanide range, x = 0-0.50 and square = anion vacancy] were synthesised using inorganic materials. The nanocrystals were dispersed on an amorphous silica support and individual crystals examined for composition and structure by high-resolution transmission electron microscopy (HREM) and energy dispersive analysis of X-rays (EDX). High-resolution pictures showed the nanocrystals to be mainly between 5 and 10 nm in size, rarely elongated and with atomically clean faceted surfaces.

Diffractograms were used to measure the lattice parameters of the face-centre-cubic (fee) fluorite structures giving values, depending on dopant species and concentration of dopant, in the range 5.5-5.8 Angstrom. EDX analysis of individual crystals with the same nominal composition compared closely to each other and to that of an average over a large area indicating good homogeneity from the preparation method.

Item Type: Journal Article
Subjects: Q Science > QD Chemistry
T Technology
T Technology > TA Engineering (General). Civil engineering (General)
Journal or Publication Title: JOURNAL OF NANOPARTICLE RESEARCH
Publisher: KLUWER ACADEMIC PUBL
ISSN: 1388-0764
Official Date: December 2001
Dates:
DateEvent
December 2001UNSPECIFIED
Volume: 3
Number: 5-6
Number of Pages: 9
Page Range: pp. 433-441
Publication Status: Published

Data sourced from Thomson Reuters' Web of Knowledge

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