Cation exchange reactions-in ionic nanocrystals

被引：1202

作者：

Son, DH

Hughes, SM

Yin, YD

Alivisatos, AP ^{[1
]}

机构：

[1] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Sci Mat, Berkeley, CA 94720 USA

[2] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA

来源：

SCIENCE | 2004年 / 306卷 / 5698期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1126/science.1103755

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 [理学]; 0710 [生物学]; 09 [农学];

摘要：

Cation exchange has been investigated in a wide range of nanocrystals of varying composition, size, and shape. Complete and fully reversible exchange occurs, and the rates of the reactions are much faster than in bulk cation exchange processes. A critical size has been identified below which the shapes of complex nanocrystals evolve toward the equilibrium shape with lowest energy during the exchange reaction. Above the critical size, the anion sublattice remains intact and the basic shapes of the initial nanocrystals are retained throughout the cation exchange. The size-dependent shape change can also be used to infer features of the microscopic mechanism.

引用

页码：1009 / 1012

页数：4

共 28 条

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