Roles of anionic and cationic template components in biomineralization of CdS nanorods using self-assembled DNA-membrane complexes

被引：45

作者：

Liang, HJ ^{[1
]}

Angelini, TE ^{[1
]}

Braun, PV ^{[1
]}

Wong, GCL ^{[1
]}

机构：

[1] Univ Illinois, Dept Phys, Frederick Seitz Mat Res Lab, Dept Mat Sci & Engn, Urbana, IL 61801 USA

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2004年 / 126卷 / 43期

关键词：

D O I：

10.1021/ja046718m

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Complexes of anionic DNA and cationic liposomes self-assemble into a multilamellar structure where two-dimensional lipid sheets confine a periodic one-dimensional lattice of parallel DNA chains, between which Cd2+ ions can condense, and be subsequently reacted with H2S to form CdS nanorods. In this work, we identify the synergistic roles of the anionic and cationic components within the DNA-membrane template; DNA is highly anionic and condenses the Cd2+ ions, while the cationic membrane modulates the concentration of condensed Cd2+ ions to control the final CdS nanorod dimensions. Due to the strong electrostatic interactions between the DNA sugar-phosphate backbone and the Cd2+ ions, crystallographic control of CdS nanostructures is possible using these simple DNA-membrane templates, which we demonstrate using nanobeam electron diffraction experiments on individual templated CdS nanorods.

引用

页码：14157 / 14165

页数：9

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