title: Pressure-driven flow through a single nanopore.
abstract: We have measured the flow of gas through single ion track pores in a polymer film using a mass spectroscopy technique. The pores are 12 μm long with diameters in the range of 50-1000 nm, and the flow was driven by pressure drops in the range 0-30 atm. When the mean free path is large compared to the pore diameter (large Knudsen number Kn), the flow rate is proportional to the pressure drop and the pore radius R cubed, and is consistent with a model of diffusive scattering at the pore walls. For Kn≤0.1, the hydrodynamic conductance increases, as predicted by standard kinetic theory models, and finally approaches the conventional Poiseuille value with zero slip length.
authors.affiliation: Department of Physics and Astronomy, University of California, Irvine, California 92697, USA.
authors.forename: A E
authors.initials: AE
authors.lastname: Velasco
authors.forename: S G
authors.initials: SG
authors.lastname: Friedman
authors.forename: M
authors.initials: M
authors.lastname: Pevarnik
authors.forename: Z S
authors.initials: ZS
authors.lastname: Siwy
authors.forename: P
authors.initials: P
authors.lastname: Taborek
mesh_terms: D000465:Algorithms; D001703:Biophysics / Q000379:methods*; D004058:Diffusion; D005740:Gases; D007700:Kinetics; D013058:Mass Spectrometry / Q000379:methods*; D044085:Microfluidics; D015233:Models, Statistical; D008962:Models, Theoretical; D036103:Nanotechnology; D011108:Polymers / Q000737:chemistry*; D011312:Pressure; D013696:Temperature
chemical_list: D005740:Gases; D011108:Polymers