Modulation of spacing and magnetic properties of iron oxide nanoparticles through polymer-mediated "bricks and mortar" self-assembly

被引：75

作者：

Boal, AK

Frankamp, BL

Uzun, O

Tuominen, MT

Rotello, VM ^{[1
]}

机构：

[1] Univ Massachusetts, Dept Chem, Amherst, MA 01003 USA

[2] Univ Massachusetts, Dept Phys, Amherst, MA 01003 USA

来源：

CHEMISTRY OF MATERIALS | 2004年 / 16卷 / 17期

关键词：

D O I：

10.1021/cm0495865

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Polymer-mediated "bricks-and-mortar" self-assembly of gamma-Fe2O3 nanoparticles allows modulation of the structure and magnetic properties of the resulting nanoparticle assemblies. Noncovalent assembly of thymine-functionalized nanoparticles using diaminotriazine-functionalized polystyrene provides extended aggregates featuring enhanced ordering relative to control samples of unassembled particles. In addition, the polymer-assembled aggregates feature increased interparticle spacing arising from the polymer "mortar". The enhanced ordering and increased spacing provided by the polymer-mediated assembly alters the strength of interparticle coupling, as manifested by characteristic changes in the magnetic properties of the assemblies.

引用

页码：3252 / 3256

页数：5

共 46 条

[1] Programming a gold nanocrystal to recognize and selectively bind a molecular substrate in solution [J].