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Cited by 260

The DOI matches its Crossref record; 9 of the 9 references it cites were found in a registry or an index.

Synthesis and Utilization of Monodisperse Superparamagnetic Colloidal Particles for Magnetically Controllable Photonic Crystals

Xu, Xiangling, Friedman, Gary, Humfeld, Keith D., Majetich, Sara A., Asher, Sanford A.·2002·Chemistry of Materials

Abstract

We demonstrate fabrication of novel magnetically controllable photonic crystals formed through the self-assembly of highly charged, monodisperse superparamagnetic colloidal spheres. These superparamagnetic monodisperse charged polystyrene particles containing nanoscale iron oxide nanoparticles were synthesized through emulsion polymerization. They self-assemble into crystalline colloidal arrays (CCAs) in deionized water and Bragg diffract visible light. The diffraction from these superparamagnetic CCAs can be controlled by imposition of magnetic fields, which readily alter the CCA lattice constant. We also observe magnetically induced self-assembly of these superparamagnetic particles into CCAs in media such as NaCl aqueous solutions and organic polar solvents, which normally do not permit spontaneous CCA self-assembly. We also find that magnetic fields can strain the face-centered cubic lattice of superparamagnetic CCAs polymerized within hydrogels.The lattice symmetry of this photonic crystal becomes tetragonal. The observed magnetically induced CCA self-assembly enables the development of novel photonic crystal materials and devices.

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Metadata

Authors
Xu, X., Friedman, G., Humfeld, K. D., Majetich, S. A., & Asher, S. A.
Venue
Chemistry of Materials
Published
2001-11-29
Volume
14
Issue
3
Pages
1249-1256
ISSN
  • 0897-4756 (ISSN-L)
  • 1520-5002
OpenAlex
W2050698700
Cited by
260
References
9
FWCI
4.95
Type
journal article
Language
en
Open access
closed

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