MersV1, Main, Exploration, bibRecord, 002474

DNA charge transport over 34 nm.

Identifieur interne : 002474 ( Main/Exploration ); précédent : 002473; suivant : 002475

DNA charge transport over 34 nm.

Auteurs : Jason D. Slinker [États-Unis] ; Natalie B. Muren ; Sara E. Renfrew ; Jacqueline K. Barton

Source :

Nature chemistry [ 1755-4349 ] ; 2011.

RBID : pubmed:21336329

Descripteurs français

KwdFr :
- ADN (), Cinétique, Nanotechnologie, Or (), Oxazines, Oxydoréduction, Techniques électrochimiques, Transfert d'électrons, Électrodes.
MESH :
- ADN, Cinétique, Nanotechnologie, Or, Oxazines, Oxydoréduction, Techniques électrochimiques, Transfert d'électrons, Électrodes.

English descriptors

KwdEn :
- DNA (chemistry), Electrochemical Techniques, Electrodes, Electron Transport, Gold (chemistry), Kinetics, Nanotechnology, Oxazines, Oxidation-Reduction.
MESH :
- chemical , chemistry : DNA, Gold.
- Electrochemical Techniques, Electrodes, Electron Transport, Kinetics, Nanotechnology, Oxazines, Oxidation-Reduction.

Abstract

Molecular wires show promise in nanoscale electronics, but the synthesis of uniform, long conductive molecules is a significant challenge. Deoxyribonucleic acid (DNA) of precise length, by contrast, is synthesized easily, but its conductivity over the distances required for nanoscale devices has not been explored. Here we demonstrate DNA charge transport (CT) over 34 nm in 100-mer monolayers on gold. Multiplexed gold electrodes modified with 100-mer DNA yield sizable electrochemical signals from a distal, covalent Nile Blue redox probe. Significant signal attenuation upon incorporation of a single base-pair mismatch demonstrates that CT is DNA-mediated. Efficient cleavage of these 100-mers by a restriction enzyme indicates that the DNA adopts a native conformation accessible to protein binding. Similar electron-transfer rates measured through 100-mer and 17-mer monolayers are consistent with rate-limiting electron tunnelling through the saturated carbon linker. This DNA-mediated CT distance of 34 nm surpasses that of most reports of molecular wires.

DOI: 10.1038/nchem.982
PubMed: 21336329

Affiliations:

États-Unis

Le document en format XML

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<term>Gold (chemistry)</term>
<term>Kinetics</term>
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<term>Or ()</term>
<term>Oxazines</term>
<term>Oxydoréduction</term>
<term>Techniques électrochimiques</term>
<term>Transfert d'électrons</term>
<term>Électrodes</term>
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<term>Gold</term>
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<keywords scheme="MESH" xml:lang="en"><term>Electrochemical Techniques</term>
<term>Electrodes</term>
<term>Electron Transport</term>
<term>Kinetics</term>
<term>Nanotechnology</term>
<term>Oxazines</term>
<term>Oxidation-Reduction</term>
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<term>Nanotechnologie</term>
<term>Or</term>
<term>Oxazines</term>
<term>Oxydoréduction</term>
<term>Techniques électrochimiques</term>
<term>Transfert d'électrons</term>
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<front><div type="abstract" xml:lang="en">Molecular wires show promise in nanoscale electronics, but the synthesis of uniform, long conductive molecules is a significant challenge. Deoxyribonucleic acid (DNA) of precise length, by contrast, is synthesized easily, but its conductivity over the distances required for nanoscale devices has not been explored. Here we demonstrate DNA charge transport (CT) over 34 nm in 100-mer monolayers on gold. Multiplexed gold electrodes modified with 100-mer DNA yield sizable electrochemical signals from a distal, covalent Nile Blue redox probe. Significant signal attenuation upon incorporation of a single base-pair mismatch demonstrates that CT is DNA-mediated. Efficient cleavage of these 100-mers by a restriction enzyme indicates that the DNA adopts a native conformation accessible to protein binding. Similar electron-transfer rates measured through 100-mer and 17-mer monolayers are consistent with rate-limiting electron tunnelling through the saturated carbon linker. This DNA-mediated CT distance of 34 nm surpasses that of most reports of molecular wires.</div>
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<country name="États-Unis"><noRegion><name sortKey="Slinker, Jason D" sort="Slinker, Jason D" uniqKey="Slinker J" first="Jason D" last="Slinker">Jason D. Slinker</name>
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Serveur d'exploration MERS

DNA charge transport over 34 nm.

DNA charge transport over 34 nm.

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri

Pour générer des pages wiki

	Serveur d'exploration MERS
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