Controlled transport of latex beads through vertically aligned carbon nanofiber membranes
Controlled transport of latex beads through vertically aligned carbon nanofiber membranes
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DOI：
10.1063/1.1490142
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发表时间：
2002-06
影响因子：
4
通讯作者：
L. Zhang;A. Melechko;V. Merkulov;M. Guillorn;M. Simpson;D. Lowndes;M. Doktycz
中科院分区：
文献类型：
--
作者：
L. Zhang;A. Melechko;V. Merkulov;M. Guillorn;M. Simpson;D. Lowndes;M. Doktycz
垂直排列的碳纳米纤维（VACNFs）条纹已被用于形成膜的尺寸选择性地控制乳胶珠的运输。在聚二甲基硅氧烷（PDMS）中建立流体结构，并与VACNF结构相连接，以表征膜的孔径。将荧光标记的乳胶珠溶液引入PDMS通道，并通过荧光和扫描电镜对其进行表征。结果表明，微球粒径有选择性地通过纳米纤维屏障，粒径限制极限与纤维间距有关。结果表明，改变VACNF阵列密度可以改变膜的分离性能。这种膜可用于分子分选和模拟天然膜的性质。
Stripes of vertically aligned carbon nanofibers (VACNFs) have been used to form membranes for size selectively controlling the transport of latex beads. Fluidic structures were created in poly(dimethylsiloxane) (PDMS) and interfaced to the VACNF structures for characterization of the membrane pore size. Solutions of fluorescently labeled latex beads were introduced into the PDMS channels and characterized by fluorescence and scanning electron microscopy. Results show that the beads size selectively pass through the nanofiber barriers and the size restriction limit correlates with the interfiber spacing. The results suggest that altering VACNF array density can alter fractionation properties of the membrane. Such membranes may be useful for molecular sorting and for mimicking the properties of natural membranes.