Fast mass transport through sub-2-nanometer carbon nanotubes
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作者:
Holt, JK
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机构:Lawrence Livermore Natl Lab, Chem & Mat Sci Directorate, Livermore, CA 94550 USA
Holt, JK
Park, HG
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机构:Lawrence Livermore Natl Lab, Chem & Mat Sci Directorate, Livermore, CA 94550 USA
Park, HG
Wang, YM
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机构:Lawrence Livermore Natl Lab, Chem & Mat Sci Directorate, Livermore, CA 94550 USA
Wang, YM
Stadermann, M
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机构:Lawrence Livermore Natl Lab, Chem & Mat Sci Directorate, Livermore, CA 94550 USA
Stadermann, M
Artyukhin, AB
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机构:Lawrence Livermore Natl Lab, Chem & Mat Sci Directorate, Livermore, CA 94550 USA
Artyukhin, AB
Grigoropoulos, CP
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机构:Lawrence Livermore Natl Lab, Chem & Mat Sci Directorate, Livermore, CA 94550 USA
Grigoropoulos, CP
Noy, A
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机构:Lawrence Livermore Natl Lab, Chem & Mat Sci Directorate, Livermore, CA 94550 USA
Noy, A
Bakajin, O
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Lawrence Livermore Natl Lab, Chem & Mat Sci Directorate, Livermore, CA 94550 USALawrence Livermore Natl Lab, Chem & Mat Sci Directorate, Livermore, CA 94550 USA
Bakajin, O
[1
]
机构:
[1] Lawrence Livermore Natl Lab, Chem & Mat Sci Directorate, Livermore, CA 94550 USA
[2] Univ Calif Berkeley, Dept Mech Engn, Berkeley, CA 94720 USA
We report gas and water flow measurements through microfabricated membranes in which aligned carbon nanotubes with diameters of less than 2 nanometers serve as pores. The measured gas flow exceeds predictions of the Knudsen diffusion model by more than an order of magnitude. The measured water flow exceeds values calculated from continuum hydrodynamics models by more than three orders of magnitude and is comparable to flow rates extrapolated from molecular dynamics simulations. The gas and water permeabilities of these nanotube-based membranes are several orders of magnitude higher than those of commercial polycarbonate membranes, despite having pore sizes an order of magnitude smaller. These membranes enable fundamental studies of mass transport in confined environments, as well as more energy-efficient nanoscale filtration.