Carbon nanotubes as electrodes for dielectrophoresis of DNA

Sampo Tuukkanen, J. Jussi Toppari, Anton Kuzyk, Lasse Hirviniemi, Vesa P. Hytoenen, Teemu Ihalainen, Päivi Törmä

Research output: Contribution to journalArticleScientificpeer-review

Abstract

Dielectrophoresis can potentially be used as an efficient trapping tool in the fabrication of molecular devices. For nanoscale objects, however, the Brownian motion poses a challenge. We show that the use of carbon nanotube electrodes makes it possible to apply relatively low trapping voltages and still achieve high enough field gradients for trapping nanoscale objects, e. g., single molecules. We compare the efficiency and other characteristics of dielectrophoresis between carbon nanotube electrodes and lithographically fabricated metallic electrodes, in the case of trapping nanoscale DNA molecules. The results are analyzed using finite element method simulations and reveal information about the frequency-dependent polarizability of DNA.

Original languageEnglish
Pages (from-to)1339-1343
Number of pages5
JournalNano Letters
Volume6
Issue number7
DOIs
Publication statusPublished - 12 Jul 2006
MoE publication typeA1 Journal article-refereed

Keywords

  • FLUID INTEGRATED-CIRCUIT
  • DOUBLE-STRANDED DNA
  • CELLS
  • SEPARATION
  • MICROELECTRODES
  • FREQUENCY

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