Application of X-ray powder diffraction to nano-materials - Determination of the atomic structure of nanocrystals with relaxed and strained surfaces

被引：31

作者：

Palosz, B

Grzanka, E

Gierlotka, S

Stel'makh, S

Pielaszek, R

Lojkowski, W

Bismayer, U

Neuefeind, J

Weber, HP

Palosz, W

机构：

[1] UNIPRESS, High Pressure Res Ctr, PL-01142 Warsaw, Poland

[2] Univ Warsaw, Inst Expt Phys, PL-00681 Warsaw, Poland

[3] Univ Hamburg, Mineral Petrog Inst, D-20146 Hamburg, Germany

[4] DESY, HASYLAB, D-22603 Hamburg, Germany

[5] European Synchrotron Radiat Facil, SNBL, F-38043 Grenoble, France

[6] NASA, George C Marshall Space Flight Ctr, Univ Space Res Assoc, Huntsville, AL 35812 USA

来源：

PHASE TRANSITIONS | 2003年 / 76卷 / 1-2期

关键词：

nano-crystals; SiC; surface structure; diffraction;

D O I：

10.1080/0141159031000076129

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

The applicability of standard methods for the evaluation of powder diffraction data of nano-size crystallites is analyzed. Based on theoretical considerations, it is shown that deviations of the structure of small particles from the Bragg approximation on an infinite crystal lattice leads to significant differences in the diffraction patterns, which may lead to an erroneous interpretation of the experimental results. An alternative evaluation of the diffraction data of nano-particles, based on the so-called "apparent lattice parameter", alp, is proposed. Based on this method, it is shown that real nano-crystals constitute a complex, heterogeneous multi-phase structure.

引用

页码：171 / 185

页数：15

共 32 条

[1] SINTERING AND DEFORMATION OF NANO-GRAINED MATERIALS [J].