Slip flow in colloidal crystals for ultraefficient chromatography.
Slip flow in colloidal crystals for ultraefficient chromatography.
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DOI:
10.1021/ja304177m
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发表时间:
2012-07-04
影响因子:
15
通讯作者:
Wirth, Mary J.
中科院分区:
文献类型:
--
作者:
Wei, Bingchuan;Rogers, Benjamin J.;Wirth, Mary J.
Slip flow occurs in colloidal crystals made of 470 nm silica spheres that are chemically modified with hydrocarbon, giving enhanced volume flow rates and a narrower distribution of fluid velocities. Bovine serum albumin separates by pressure-driven flow with a zone that is 15-fold narrower than the theoretical limit for Hagen-Poiseuille flow. The zone variance, normalized for separation length, is 15 nm, which is 500-fold smaller than previous reports for pressure-driven protein chromatography. A colloidal crystal is shown to separate a monoclonal antibody from its aggregates in only 40 s, representing a ten-fold increase in speed. Slip flow thus has profound implications for protein chromatography.
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