Spin Specific Electron Conduction through DNA Oligomers

Spin-based properties, applications, and devices are commonly related to magnetic effects and to magnetic materials. Most of the development in spintronics is currently based on inorganic materials. Despite the fact that the magnetoresistance effect has been observed in organic materials, until now...

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Bibliographic Details
Published in:Nano letters 2011-11, Vol.11 (11), p.4652-4655
Main Authors: Xie, Zouti, Markus, Tal Z, Cohen, Sidney R, Vager, Zeev, Gutierrez, Rafael, Naaman, Ron
Format: Article
Language:English
Subjects:
Applied sciences
Biological
Computer Simulation
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Deoxyribonucleic acid
Devices
DNA - chemistry
DNA - ultrastructure
Electric Conductivity
Electrodes
Electronic structure and electrical properties of surfaces, interfaces, thin films and low-dimensional structures
Electronic transport in multilayers, nanoscale materials and structures
Electronics
Electrons
Exact sciences and technology
Magnetic properties
Magnetic properties and materials
Magnetic properties of nanostructures
Magnetoelectric, magnetostrictive, magnetoacoustic, magnetooptic and magnetothermal devices. Spintronics
Models, Chemical
Nanostructure
Oligomers
Physics
Selectivity
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
Small particles and nanoscale materials
Spintronics
Studies of specific magnetic materials
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Summary:Spin-based properties, applications, and devices are commonly related to magnetic effects and to magnetic materials. Most of the development in spintronics is currently based on inorganic materials. Despite the fact that the magnetoresistance effect has been observed in organic materials, until now spin selectivity of organic based spintronics devices originated from an inorganic ferromagnetic electrode and was not determined by the organic molecules themselves. Here we show that conduction through double-stranded DNA oligomers is spin selective, demonstrating a true organic spin filter. The selectivity exceeds that of any known system at room temperature. The spin dependent resistivity indicates that the effect cannot result solely from the atomic spin–orbit coupling and must relate to a special property resulting from the chirality symmetry. The results may reflect on the importance of spin in determining electron transfer rates through biological systems.
ISSN:1530-6984
1530-6992
DOI:10.1021/nl2021637