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Separation of Nanoparticles by Gel Electrophoresis According to Size and Shape

, , , , and . Nano Letters, 7 (9): 2881--2885 (Sep 1, 2007)
DOI: 10.1021/nl071615y

Abstract

We demonstrate the separation of gold and silver nanoparticles according to their size and shape by agarose gel electrophoresis after coating them with a charged polymer layer. The separation is monitored optically using the size- and shape-dependent plasmon resonance of noble metal particles and confirmed by transmission electron microscopy (TEM). Electrophoretic mobilities are quantitatively explained by a model based on the Henry formula, providing a theoretical framework for predicting gel mobilities of polymer coated nanoparticles.

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