Dielectrophoresis of nanoscale double-stranded DNA and humidity effects on its electrical conductivity

S. Tuukkanen*, A. Kuzyk, J. J. Toppari, V. P. Hytönen, T. Ihalainen, P. Törmä

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

65 Citations (Scopus)

Abstract

The dielectrophoresis method for trapping and attaching nanoscale double-stranded DNA between nanoelectrodes was developed. The method gives a high yield of trapping single or a few molecules only which enables transport measurements at the single molecule level. Electrical conductivity of individual 140-nm -long DNA molecules was measured, showing insulating behavior in dry conditions. In contrast, clear enhancement of conductivity was observed in moist conditions, relating to the interplay between the conformation of DNA molecules and their conductivity.

Original languageEnglish
Article number183102
Pages (from-to)1-3
Number of pages3
JournalApplied Physics Letters
Volume87
Issue number18
DOIs
Publication statusPublished - 31 Oct 2005
MoE publication typeA1 Journal article-refereed

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