EXTENDED ELECTRON ENERGY-LOSS FINE-STRUCTURE AND SELECTED-AREA ELECTRON-DIFFRACTION STUDIES OF SMALL PALLADIUM CLUSTERS

被引：13

作者：

DIOCIAIUTI, M ^{[1
]}

PICOZZI, P ^{[1
]}

SANTUCCI, S ^{[1
]}

LOZZI, L ^{[1
]}

DECRESCENZI, M ^{[1
]}

机构：

[1] UNIV ROMA TOR VERGATA 2,DIPARTIMENTO FIS,I-00173 ROME,ITALY

来源：

JOURNAL OF MICROSCOPY-OXFORD | 1992年 / 166卷

关键词：

EXTENDED ELECTRON ENERGY-LOSS FINE STRUCTURE; SELECTED-AREA ELECTRON DIFFRACTION; CLUSTERS; PALLADIUM;

D O I：

10.1111/j.1365-2818.1992.tb01521.x

中图分类号：

TH742 [显微镜];

学科分类号：

摘要：

Extended electron energy-loss fine structure (EXELFS) and selected-area electron diffraction (SAED) techniques have both been applied to the study of the crystalline structure of Pd clusters of average diameters ranging from bulk to 24 angstrom. The combined use of these techniques gives complementary information about the crystalline structure of Pd clusters. Both techniques show the same lattice parameter expansion, about 4% for the smallest Pd cluster, with respect to the bulk. The EXELFS analysis performed on the Pd-M4,5 edge shows a sizeable increase of structural disorder in the smallest cluster. SAED gives additional information about the Pd bulk sample, showing the occurrence of crystalline regions about 50 angstrom in diameter.

引用

页码：231 / 245

页数：15

共 38 条

[11] SCANNING TUNNELING MICROSCOPY OF CU, AG, AU AND AL ADATOMS, SMALL CLUSTERS, AND ISLANDS ON GRAPHITE [J].

GANZ, E ;

SATTLER, K ;

CLARKE, J .

SURFACE SCIENCE, 1989, 219 (1-2) :33-67

[12]

GANZ E, 1988, PHYS REV LETT, V18, P1856

[13] SUBSTRATE-INDUCED LATTICE STRAIN IN PARTICULATE PALLADIUM DEPOSITS [J].

GARMON, LB ;

DOERING, DL .

THIN SOLID FILMS, 1983, 102 (02) :141-148

[14] EXTENDED X-RAY ABSORPTION FINE-STRUCTURE DETERMINATION OF THERMAL DISORDER IN CU - COMPARISON OF THEORY AND EXPERIMENT [J].

GREEGOR, RB ;

LYTLE, FW .

PHYSICAL REVIEW B, 1979, 20 (12) :4902-4907

[15]

GRUNDY PJ, 1980, PHYSICS PROGRAMS, P461

[16]

Heidenreich R.D., 1964, FUNDAMENTALS TRANSMI

[17] INSITU TEM EVIDENCE OF LATTICE EXPANSION OF VERY SMALL SUPPORTED PALLADIUM PARTICLES [J].

HEINEMANN, K ;

POPPA, H .

SURFACE SCIENCE, 1985, 156 (JUN) :265-274

[18] STRUCTURAL INSTABILITY OF ULTRAFINE PARTICLES OF METALS [J].

IIJIMA, S ;

ICHIHASHI, T .

PHYSICAL REVIEW LETTERS, 1986, 56 (06) :616-619

[19]

IIJIMA S, 1986, J ELECTRON MICROSC, V34, P249

[20]

JENA P, 1986, PHYSICS CHEM SMALL C

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