Dielectrophoresis of nanoscale dsDNA and humidity effects on its electrical conductivity

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.

arXiv comment4 pages, 2 figures

References in corpus (4)

• Insulating behavior of lambda-DNA on the micron scale
• Conductivity of DNA probed by conducting-atomic force microscopy: effects of contact electrode, DNA structure, surface interactions
• Intrinsic Low Temperature Paramagnetism in B-DNA
• Dipole relaxation losses in DNA

Cited by in corpus (7)

• Carbon Nanotubes as Electrodes for Dielectrophoresis of DNA
• Trapping of 27 bp - 8 kbp DNA and immobilization of thiol-modified DNA using dielectrophoresis
• Ionic conductivity on a wetting surface
• Enhanced dielectrophoresis of nanocolloids by dimer formation
• Growth of immobilized DNA by polymerase: bridging nanoelectrodes with individual dsDNA molecules
• Rate-equation calculations of the current flow through two-site molecular device and DNA-based junction
• Transfer-matrix approach to the problem of electrical conduction through a series of absorbers