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Nanoscale. 2012 Aug 7;4(15):4438-42. doi: 10.1039/c2nr31068f. Epub 2012 Jun 13.

Self-assembly and magnetically induced phase transition of three-dimensional colloidal photonic crystals.

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  • 1Department of Chemistry, University of California, Riverside, Riverside, California, USA.


Charged superparamagnetic colloidal Fe(3)O(4)@SiO(2) core-shell particles were chosen as model dipolar soft spheres to study their crystallization and magnetically induced phase transition in suspensions. The 3D colloidal crystals feature excellent magnetically responsive photonic properties with strong diffraction, fast response and wide tunability.

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