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Yongxing Hu, Le He and Yadong Yin Charge Stabilization of Superparamagnetic Colloids for High-Performance Responsive Photonic Structures Small 8

Version of Record online: 28 SEP 2012 | DOI: 10.1002/smll.201201320

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By securing charged polymer ligands on the surface of superparamagnetic colloids with a layer of porous silica, a strong electrostatic interparticle repulsion with long-term stability can be established to balance the magnetically induced attraction and create 1D periodic chains that show magnetically responsive diffraction in the visible spectrum.

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