High-performance separation of nanoparticles with ultrathin porous nanocrystalline silicon membranes.
High-performance separation of nanoparticles with ultrathin porous nanocrystalline silicon membranes.
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DOI：
10.1021/nn102064c
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发表时间：
2010-11-23
期刊：
影响因子：
17.1
通讯作者：
McGrath JL
中科院分区：
文献类型：
--
作者：
Gaborski TR;Snyder JL;Striemer CC;Fang DZ;Hoffman M;Fauchet PM;McGrath JL
多孔纳米晶硅（pnc-Si）是一种厚度为15 nm的独立膜材料，可用于小规模分离、生物传感器、细胞培养和芯片实验室设备。Pnc-Si已经显示出对扩散物质的高渗透性和基于分子尺寸或电荷的选择性。在这份报告中，我们的pnc-Si在加压流的特性。我们比较结果，长期以来的理论运输通过短孔直接从电子显微镜照片获得的实际孔分布。测量结果与理论一致，在很宽的范围内的孔径和孔隙率，并在数量级高于商业超滤和实验碳纳米管膜所表现出的。我们还表明，pnc-Si膜可用于死端过滤，以更好地超过5 nm的分辨率，不显著的样品损失，和滤液的稀释度小的fraceleted金纳米粒子和蛋白质尺寸梯。这些性能特点，结合可扩展的制造，使pnc-Si过滤成为许多纳米颗粒和生物分离问题的直接解决方案。
Porous nanocrystalline silicon (pnc-Si) is a 15 nm thin freestanding membrane material with applications in small-scale separations, biosensors, cell culture and lab-on-a-chip devices. Pnc-Si has already been shown to exhibit high permeability to diffusing species and selectivity based on molecular size or charge. In this report we characterize properties of pnc-Si in pressurized flows. We compare results to long-standing theories for transport through short pores using actual pore distributions obtained directly from electron micrographs. Measurements are in agreement with theory over a wide range of pore sizes and porosities and at orders-of-magnitude higher than those exhibited by commercial ultrafiltration and experimental carbon nanotube membranes. We also show that pnc-Si membranes can be used in dead-end filtration to fractionate gold nanoparticles and protein size ladders with better than 5 nm resolution, insignificant sample loss, and little dilution of the filtrate. These performance characteristics, combined with scalable manufacturing, make pnc-Si filtration a straightforward solution to many nanoparticle and biological separation problems.
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影响因子：
19
作者：
Schacher, Felix;Ulbricht, Mathias;Mueller, Axel H. E.
通讯作者：
Mueller, Axel H. E.
影响因子：
9.5
作者：
Latulippe, David R.;Ager, Kimberly;Zydney, Andrew L.
通讯作者：
Zydney, Andrew L.
影响因子：
56.9
作者：
Holt, JK;Park, HG;Bakajin, O
通讯作者：
Bakajin, O
影响因子：
3.8
作者：
Latulippe, David R.;Zydney, Andrew L.
通讯作者：
Zydney, Andrew L.
DOI：
10.1107/s0907444904003166
发表时间：
2004-04-01
影响因子：
2.2
作者：
Saito, R;Sato, T;Tanaka, N
通讯作者：
Tanaka, N