Structure characterization and mechanism of growth of PbTe nanocrystals embedded in a silicate glass

被引：24

作者：

Craievich, AF ^{[1
]}

Kellermann, G

Barbosa, LC

Alves, OL

机构：

[1] Univ Sao Paulo, Inst Phys, BR-09500900 Sao Paulo, Brazil

[2] Natl Synchrotron Light Lab, Campinas, SP, Brazil

[3] Univ Estadual Campinas, Inst Phys, Campinas, SP, Brazil

[4] Univ Estadual Campinas, Inst Chem, Campinas, SP, Brazil

[5] Univ Sao Paulo, Inst Phys, BR-05315970 Sao Paulo, Brazil

来源：

PHYSICAL REVIEW LETTERS | 2002年 / 89卷 / 23期

基金：

巴西圣保罗研究基金会;

关键词：

D O I：

10.1103/PhysRevLett.89.235503

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A nanocomposite consisting of PbTe nanocrystals embedded in a silicate glass was studied by small-angle x-ray scattering during the early stage of isothermal annealing at 793 K. A theoretical function based on a model of spherical PbTe nanocrystals surrounded by a Pb and Te depleted shell fits well to all experimental curves. The time dependences of the nanocrystal radius and size of the depleted shell agree with the prediction of the theory of nucleation and growth by the classical mechanism of atomic diffusion.

引用

页数：4

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