A Landau-Squire nanojet.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 24124664.
- Also identified by DOI 10.1021/nl402350a and PMC identifier 3897716.
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Abstract
Fluid jets are found in nature at all length scales from microscopic to cosmological. Here we report on an electroosmotically driven jet from a single glass nanopore about 75 nm in radius with a maximum flow rate ~15 pL/s. A novel anemometry technique allows us to map out the vorticity and velocity fields that show excellent agreement with the classical Landau-Squire solution of the Navier-Stokes equations for a point jet. We observe a phenomenon that we call flow rectification: an asymmetry in the flow rate with respect to voltage reversal. Such a nanojet could potentially find applications in micromanipulation, nanopatterning, and as a diode in microfluidic circuits.
Medical subject headings
- Nanotechnology