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Electron ratcheting in self-assembled soft matter.

Publication ,  Journal Article
Valdiviezo, J; Zhang, P; Beratan, DN
Published in: The Journal of chemical physics
August 2021

Ratcheted multi-step hopping electron transfer systems can plausibly produce directional charge transport over very large distances without requiring a source-drain voltage bias. We examine molecular strategies to realize ratcheted charge transport based on multi-step charge hopping, and we illustrate two ratcheting mechanisms with examples based on DNA structures. The charge transport times and currents that may be generated in these assemblies are also estimated using kinetic simulations. The first ratcheting mechanism described for nanoscale systems requires local electric fields on the 109 V/m scale to realize nearly 100% population transport. The second ratcheting mechanism for even larger systems, based on electrochemical gating, is estimated to generate currents as large as 0.1 pA for DNA structures that are a few μm in length with a gate voltage of about 5 V, a magnitude comparable to currents measured in DNA wires at the nanoscale when a source-drain voltage bias of similar magnitude is applied, suggesting an approach to considerably extend the distance range over which DNA charge transport devices may operate.

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Published In

The Journal of chemical physics

DOI

EISSN

1089-7690

ISSN

0021-9606

Publication Date

August 2021

Volume

155

Issue

5

Start / End Page

055102

Related Subject Headings

  • Static Electricity
  • Nanostructures
  • Kinetics
  • Electrochemistry
  • Electric Conductivity
  • DNA
  • Chemical Physics
  • 51 Physical sciences
  • 40 Engineering
  • 34 Chemical sciences
 

Citation

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Valdiviezo, J., Zhang, P., & Beratan, D. N. (2021). Electron ratcheting in self-assembled soft matter. The Journal of Chemical Physics, 155(5), 055102. https://doi.org/10.1063/5.0044420
Valdiviezo, Jesús, Peng Zhang, and David N. Beratan. “Electron ratcheting in self-assembled soft matter.The Journal of Chemical Physics 155, no. 5 (August 2021): 055102. https://doi.org/10.1063/5.0044420.
Valdiviezo J, Zhang P, Beratan DN. Electron ratcheting in self-assembled soft matter. The Journal of chemical physics. 2021 Aug;155(5):055102.
Valdiviezo, Jesús, et al. “Electron ratcheting in self-assembled soft matter.The Journal of Chemical Physics, vol. 155, no. 5, Aug. 2021, p. 055102. Epmc, doi:10.1063/5.0044420.
Valdiviezo J, Zhang P, Beratan DN. Electron ratcheting in self-assembled soft matter. The Journal of chemical physics. 2021 Aug;155(5):055102.

Published In

The Journal of chemical physics

DOI

EISSN

1089-7690

ISSN

0021-9606

Publication Date

August 2021

Volume

155

Issue

5

Start / End Page

055102

Related Subject Headings

  • Static Electricity
  • Nanostructures
  • Kinetics
  • Electrochemistry
  • Electric Conductivity
  • DNA
  • Chemical Physics
  • 51 Physical sciences
  • 40 Engineering
  • 34 Chemical sciences