Self-assembly of colloidal pyramids in magnetic fields

被引：31

作者：

Helseth, LE ^{[1
]}

机构：

[1] Nanyang Technol Univ, Sch Phys & Math Sci, Div Phys & Appl Phys, Singapore 2263, Singapore

来源：

LANGMUIR | 2005年 / 21卷 / 16期

关键词：

D O I：

10.1021/la051140v

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We study routes toward the construction of 2D colloidal pyramids. We find that magnetic beads may self-assemble into pyramids near a nonmagnetic ID boundary as long as the number of beads in the pyramid does not exceed 10. We have also found that a strong magnetic field gradient could act as a boundary, thus assisting the self-assembly of magnetic colloids in water, and have observed the formation of stable microscopic pyramids within a certain magnetic field range. Our results indicate that colloidal pyramids can be formed in a number of ways by utilizing external fields.

引用

页码：7276 / 7279

页数：4

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