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Giant Quasi-Slip in Flows in 500 nm Carbon Nanotubes

Giant Quasi-Slip in Flows in 500 nm Carbon Nanotubes. S. S. Ray, P. Chando , Prof. A. L. Yarin , Mechanical and Industrial Engineering Prime Grant Support: NSF-NIRT CBET-0609062, NSF-EEC 0755115 . Laminar pressure-driven flows in carbon nanotubes Bi-layer flows of liquid and gas

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Giant Quasi-Slip in Flows in 500 nm Carbon Nanotubes

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  1. Giant Quasi-Slip in Flows in 500 nm Carbon Nanotubes S. S. Ray, P. Chando, Prof. A. L. Yarin, Mechanical and Industrial Engineering Prime Grant Support: NSF-NIRT CBET-0609062, NSF-EEC 0755115 • Laminar pressure-driven flows in carbon nanotubes • Bi-layer flows of liquid and gas • Nanofluidics • Nanoreactors • Drug delivery Nanotube exits and velocity profile • It was demonstrated experimentally and theoretically that bi-layer liquid/gas flows can result in an over-limiting flow regime • In the over-limiting regime a higher flow rate of liquid can be achieved as compared to the case when the same liquid flows through the same tube subjected to the same pressure drop and occupies the whole bore. This means that it is possible to release more liquid than predicted by the Poiseuille law, even though in the bi-layer flow liquid does no occupy the whole cross-section • The result effectively means a forced giant quasi-slip • Nanofluidics, polymerization nanoreactors,drug delivery • Electrospinning was used to produce polymer nanofibers, which served as templates for nanotubes • Parallel arrays of thousands of nanofibers were embedded in polyacrylonitrile (PAN) strips • Thermal treatment was used to carbonize PAN and eliminate the template nanofibers to make hollow channels • Bi-layer n-decane/air flows were discharged in water, which allowed for measurements of the flow rate via observations of the liquid/liquid and liquid gas interfaces • Published in S. S. Ray, P. Chando, A. L. Yarin, Nanotechnology 20, 095711 (2009)

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