4.4 Article

Strain dependence of dissociative adsorption of H2O on epitaxially strained, out-of-plane polarized, BaTiO3(001) thin films

期刊

THIN SOLID FILMS
卷 717, 期 -, 页码 -

出版社

ELSEVIER SCIENCE SA
DOI: 10.1016/j.tsf.2020.138428

关键词

Barium titanate; Water vapor adsorption; Thin films; X-ray photoelectron spectroscopy; Temperature programmed desorption

资金

  1. National Natural Science Foundation of China [21703031]
  2. Shanghai Talent Development Funding
  3. French National Research Agency (ANR) project Surf-FER [ANR-10BLAN-1012]
  4. Donghua University

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The study found that the out-of-plane polarized surface of epitaxial, TiO2-terminated, BaTiO3(100) thin films affects the desorption reaction of H2O. As the in-plane strain increases, the apparent activation energy of desorption significantly increases, indicating that the strain-induced ferroelectric distortion affects the strength of the chemical bond.
The strain dependence of the apparent activation energy of desorption of H2O on epitaxial, TiO2-terminated, out-of-plane polarized, BaTiO3(100) thin films has been investigated using X-ray diffraction, X-ray photoelectron spectroscopy and temperature-programmed desorption. The apparent activation energy of desorption increases significantly with the in-plane strain, suggesting that the strain-induced ferroelectric distortion determines the strength of the chemical bond between the dissociatively adsorbed water and the surface.

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