Atomically controlled electrochemical nucleation at superionic solid electrolyte surfaces

Ilia Valov, Ina Sapezanskaia, Alpana Nayak, Tohru Tsuruoka, Thomas Bredow, Tsuyoshi Hasegawa, Georgi Staikov, Masakazu Aono, Rainer Waser

Research output: Contribution to journalArticle

146 Citations (Scopus)

Abstract

Electrochemical equilibrium and the transfer of mass and charge through interfaces at the atomic scale are of fundamental importance for the microscopic understanding of elementary physicochemical processes. Approaching atomic dimensions, phase instabilities and instrumentation limits restrict the resolution. Here we show an ultimate lateral, mass and charge resolution during electrochemical Ag phase formation at the surface of RbAg 4 I 5 superionic conductor thin films. We found that a small amount of electron donors in the solid electrolyte enables scanning tunnelling microscope measurements and atomically resolved imaging. We demonstrate that Ag critical nucleus formation is rate limiting. The Gibbs energy of this process takes discrete values and the number of atoms of the critical nucleus remains constant over a large range of applied potentials. Our approach is crucial to elucidate the mechanism of atomic switches and highlights the possibility of extending this method to a variety of other electrochemical systems.

Original languageEnglish
Pages (from-to)530-535
Number of pages6
JournalNature Materials
Volume11
Issue number6
DOIs
Publication statusPublished - 2012 Jun
Externally publishedYes

Fingerprint

Solid electrolytes
solid electrolytes
Gibbs free energy
Microscopes
Nucleation
Switches
nucleation
Scanning
Imaging techniques
Thin films
Atoms
nuclei
Electrons
switches
conductors
microscopes
scanning
thin films
atoms
electrons

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials
  • Condensed Matter Physics
  • Materials Science(all)
  • Chemistry(all)

Cite this

Valov, I., Sapezanskaia, I., Nayak, A., Tsuruoka, T., Bredow, T., Hasegawa, T., ... Waser, R. (2012). Atomically controlled electrochemical nucleation at superionic solid electrolyte surfaces. Nature Materials, 11(6), 530-535. https://doi.org/10.1038/nmat3307

Atomically controlled electrochemical nucleation at superionic solid electrolyte surfaces. / Valov, Ilia; Sapezanskaia, Ina; Nayak, Alpana; Tsuruoka, Tohru; Bredow, Thomas; Hasegawa, Tsuyoshi; Staikov, Georgi; Aono, Masakazu; Waser, Rainer.

In: Nature Materials, Vol. 11, No. 6, 06.2012, p. 530-535.

Research output: Contribution to journalArticle

Valov, I, Sapezanskaia, I, Nayak, A, Tsuruoka, T, Bredow, T, Hasegawa, T, Staikov, G, Aono, M & Waser, R 2012, 'Atomically controlled electrochemical nucleation at superionic solid electrolyte surfaces', Nature Materials, vol. 11, no. 6, pp. 530-535. https://doi.org/10.1038/nmat3307
Valov, Ilia ; Sapezanskaia, Ina ; Nayak, Alpana ; Tsuruoka, Tohru ; Bredow, Thomas ; Hasegawa, Tsuyoshi ; Staikov, Georgi ; Aono, Masakazu ; Waser, Rainer. / Atomically controlled electrochemical nucleation at superionic solid electrolyte surfaces. In: Nature Materials. 2012 ; Vol. 11, No. 6. pp. 530-535.
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