A Landau-Squire nanojet

Nadanai Laohakunakorn, Benjamin Gollnick, Fernando Moreno-Herrero, Dirk G.A.L. Aarts, Roel P.A. Dullens, Sandip Ghosal, Ulrich F. Keyser*

*Corresponding author for this work

Research output: Contribution to journalArticle

29 Scopus citations

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.

Original languageEnglish (US)
Pages (from-to)5141-5146
Number of pages6
JournalNano letters
Volume13
Issue number11
DOIs
StatePublished - Nov 13 2013

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Keywords

  • Nanojet
  • flow rectification
  • microfluidics
  • nanopore

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

Cite this

Laohakunakorn, N., Gollnick, B., Moreno-Herrero, F., Aarts, D. G. A. L., Dullens, R. P. A., Ghosal, S., & Keyser, U. F. (2013). A Landau-Squire nanojet. Nano letters, 13(11), 5141-5146. https://doi.org/10.1021/nl402350a