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.
Wirth, Mary J.
中科院分区:
化学1区
文献类型:
--
作者:
Wei, Bingchuan;Rogers, Benjamin J.;Wirth, Mary J.

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滑移流发生在由470 nm的二氧化硅球制成的胶体晶体中,所述二氧化硅球用碳氢化合物进行化学改性,从而提供增强的体积流速和较窄的流体速度分布。牛血清白蛋白通过压力驱动流分离,其区域比哈根-普瓦勒流的理论极限窄15倍。对于分离长度归一化的区域方差为15 nm,这比压力驱动蛋白质色谱的先前报道小500倍。胶体晶体仅在40秒内就能将单克隆抗体从其聚集体中分离出来,速度提高了10倍。因此,滑流对蛋白质色谱具有深远的影响。
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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