Localized Joule heating produced by ion current focusing through micron-size holes

V. Viasnoff, U. Bockelmann, A. Meller, H. Isambert, L. Laufer, Y. Tsori

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

We provide an experimental demonstration that the focusing of ionic currents in a micron size hole connecting two chambers can produce local temperature increases of up to 100°C with gradients as large as 1 °Kμ m-1. We find a good agreement between the measured temperature profiles and a finite elements-based numerical calculation. We show how the thermal gradients can be used to measure the full melting profile of DNA duplexes within a region of 40μm. The possibility to produce even larger gradients using submicron pores is discussed.

Original languageEnglish
Article number163701
JournalApplied Physics Letters
Volume96
Issue number16
DOIs
StatePublished - 19 Apr 2010

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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