Jump to main content
Jump to site search

Issue 3, 2020
Previous Article Next Article

Spin-dependent charge transfer at chiral electrodes probed by magnetic resonance

Author affiliations

Abstract

Chirality-induced spin selectivity is evidenced by exciting the spin resonance of radicals in an electrochemical cell where the working electrode is covered with a chiral self-assembled monolayer. Because the electron transfer to and from the paramagnetic radical is spin dependent, the electrochemical current changes at resonance. This electrically-detected magnetic resonance (EDMR) is monitored by a lock-in detection based on electrode voltage modulation, at a frequency that optimizes the sensitivity of the differential conductance to the electrode charge transfer process. The method is validated using p-doped GaAs electrodes in which the conduction band electrons are hyperpolarized by a well-known method of optical spin pumping with circularly polarized light. Gold electrodes covered with peptides consisting of 5 alanine groups (Al5) present a relative current change of up to 5 × 10−5 when the resonance condition is met, corresponding to a spin filtering efficiency between 6 and 19%.

Graphical abstract: Spin-dependent charge transfer at chiral electrodes probed by magnetic resonance

Back to tab navigation

Supplementary files

Article information


Submitted
23 Aug 2019
Accepted
16 Oct 2019
First published
28 Oct 2019

This article is Open Access

Phys. Chem. Chem. Phys., 2020,22, 997-1002
Article type
Paper

Spin-dependent charge transfer at chiral electrodes probed by magnetic resonance

F. Blumenschein, M. Tamski, C. Roussel, E. Z. B. Smolinsky, F. Tassinari, R. Naaman and J. Ansermet, Phys. Chem. Chem. Phys., 2020, 22, 997
DOI: 10.1039/C9CP04681J

This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence. Material from this article can be used in other publications provided that the correct acknowledgement is given with the reproduced material and it is not used for commercial purposes.

Reproduced material should be attributed as follows:

  • For reproduction of material from NJC:
    [Original citation] - Published by The Royal Society of Chemistry (RSC) on behalf of the Centre National de la Recherche Scientifique (CNRS) and the RSC.
  • For reproduction of material from PCCP:
    [Original citation] - Published by the PCCP Owner Societies.
  • For reproduction of material from PPS:
    [Original citation] - Published by The Royal Society of Chemistry (RSC) on behalf of the European Society for Photobiology, the European Photochemistry Association, and RSC.
  • For reproduction of material from all other RSC journals:
    [Original citation] - Published by The Royal Society of Chemistry.

Information about reproducing material from RSC articles with different licences is available on our Permission Requests page.


Social activity

Search articles by author

Spotlight

Advertisements