This work was supported by a National Science Foundation Career Award No. DMR-0547976 and was performed in part at facilities of the Cornell Center for Materials Research (NSF MRSEC, DMR-0520404), the Cornell Nanobiotechnology Center (NSF Agreement No. ECS-9876771), and the labs of Professor Itai Cohen. The authors thank J. Cha for high-resolution TEM imaging, M. Kamperman for ultramicrotomy, D. Loh for graphics assistance, and S. Badaire and J. Savage for insightful discussions.
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Communication
Anisotropic Magnetic Colloids: A Strategy to Form Complex Structures Using Nonspherical Building Blocks†
Article first published online: 4 MAY 2009
DOI: 10.1002/smll.200900135
Copyright © 2009 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
Additional Information
How to Cite
Lee, S. H. and Liddell, C. M. (2009), Anisotropic Magnetic Colloids: A Strategy to Form Complex Structures Using Nonspherical Building Blocks. Small, 5: 1957–1962. doi: 10.1002/smll.200900135
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Publication History
- Issue published online: 26 AUG 2009
- Article first published online: 4 MAY 2009
- Manuscript Revised: 23 FEB 2009
- Manuscript Received: 23 JAN 2009
Keywords:
- colloids;
- magnetic anisotropy;
- self-assembly
Graphical Abstract
Hierarchical microstructure and magnetic anisotropy of peanut-shaped colloids promotes a permanent transverse magnetic dipole, leading to rich self-assembly behavior. Crisscross and planar zigzag chains (see image; scale bar = 2 µm in A and 5 µm in B), as well as a molecular crystal-type phase with oblique symmetry in 2D are observed.