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

研究成果: Article

159 引用 (Scopus)

抜粋

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.

元の言語English
ページ(範囲)530-535
ページ数6
ジャーナルNature Materials
11
発行部数6
DOI
出版物ステータスPublished - 2012 6

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ASJC Scopus subject areas

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

これを引用

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, 11(6), 530-535. https://doi.org/10.1038/nmat3307