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膜中的不对称毛孔充当了巨大的平行棕色拉切特

Sven Matthias¹, Frank Müller

¹Max Planck Institute of Microstructure Physics, Weinberg 2, Halle 06120, Germany.

|July 4, 2003

概括

布朗的子,使用特别蚀刻的膜,可以在没有流体运动的情况下指导粒子运动. 这项技术显示出大规模颗粒和生物分子分离的潜力.

科学领域:

物理物理学物理
材料科学材料科学材料科学
纳米技术纳米技术

背景情况:

布朗运动通常会导致随机粒子运动.
使用不对称的障碍物可以实现定向运动,形成布朗式杆.
以前的应用包括用于粒子分离的光学和量子效应.

研究的目的:

为了证明宏的膜作为有效的布朗式杆.
探索它们对大规模粒子和生物分子分离的潜力.
为了研究周期性压力形状下的粒子运输.

主要方法:

制造具有周期性变化的孔径的大孔膜.
在膜上应用零-平均周期性压力配置文件.
粒子运输的实验观测和计算分析.

主要成果:

膜的作用是巨大的平行,堆叠的布朗式子.
定期压力诱导的净粒子运动通过孔隙没有散装流体运输.
观察到的压力依赖和运输方向反转与理论计算相匹配.

结论:

具有不对称毛孔的宏孔膜作为高效的布朗式子.
该系统为粒子分离提供了一个可扩展的平台.
这些发现与子运输特性理论模型一致.

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