Structural study on monosize CeO2-x nano-particles

被引：211

作者：

Tsunekawa, S ^{[1
]}

Sivamohan, R ^{[1
]}

Ito, S ^{[1
]}

Kasuya, A ^{[1
]}

Fukuda, T ^{[1
]}

机构：

[1] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan

来源：

NANOSTRUCTURED MATERIALS | 1999年 / 11卷 / 01期

关键词：

D O I：

10.1016/S0965-9773(99)00027-6

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Electron diffraction patterns are obtained for monosize ceria nano-particles produced by a size-fractionation method with surfactants. A dependency of lattice parameters estimated by the least squares method on crystalline particle sizes strongly suggests that a C-type cerium sesquioxide, which has never been reported in the bulk crystal, exists in the particle 1.5 nm in diameter. Chemical reactions responsible for the valence change of cerium ions near the surface are proposed for the existence of the sesquioxide in a strong acid sol. (C) 1999 Acta Metallurgica Inc.

引用

页码：141 / 147

页数：7

共 16 条

[1]

Bradley D.C., 1978, METAL ALKOXIDES

[2] PROBING THE TRANSITION FROM VANDERWAALS TO METALLIC MERCURY CLUSTERS [J].

BRECHIGNAC, C ;

BROYER, M ;

CAHUZAC, P ;

DELACRETAZ, G ;

LABASTIE, P ;

WOLF, JP ;

WOSTE, L .

PHYSICAL REVIEW LETTERS, 1988, 60 (04) :275-278

[3]

DRAGOO, 1983, PDF34394 JCPDS

[4]

DRAGOO, 1983, NBS MONOGR, V20, P38

[5]

Eyring L., 1979, Handbook on the Physics and Chemistry of Rare-earths, Vol.3. Non-metallic Compounds 1, P337, DOI 10.1016/S0168-1273(79)03010-5

[6]

GALASSO FS, 1970, STRUCTURE PROPERTIES, P100

[7] Magnetic properties of nanostructured materials [J].

LesliePelecky, DL ;

Rieke, RD .

CHEMISTRY OF MATERIALS, 1996, 8 (08) :1770-1783

[8]

MCCARTHY, 1904, PDF231048 JCPDS

[9]

MORSE MD, 1986, CHEM REV, V86, P1097

[10] PHASE EQUILIBRIA IN SYSTEMS INVOLVING THE RARE-EARTH OXIDES .1. POLYMORPHISM OF THE OXIDES OF THE TRIVALENT RARE-EARTH IONS [J].

ROTH, RS ;

SCHNEIDER, SJ .

JOURNAL OF RESEARCH OF THE NATIONAL BUREAU OF STANDARDS SECTION A-PHYSICS AND CHEMISTRY, 1960, 64 (04) :309-316

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