High-speed electroseparations inside silica colloidal crystals |
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Authors: | Zheng Suping Ross Eric Legg Michael A Wirth Mary J |
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Affiliation: | Department of Chemistry, University of Arizona, 1306 East University Boulevard, Tucson, Arizona 85721, USA. |
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Abstract: | Crystals made from 200 nm silica colloids are hardened and chemically modified with chlorodimethyloctadecylsilane for use in electrically driven, reversed-phase separations. A van Deemter plot reveals extremely narrow peak widths for the separation of a cationic hydrophobic dye, DiI, with both the A and C terms 10-fold smaller than those for a conventional HPLC column. Electrically driven separations are demonstrated to be achieved in less than 10 s for three dyes differing in hydrophobicity and also for three peptides differing in electrophoretic mobility. The results show that these media are promising for high-speed separations. |
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