The DOI matches its Crossref record; 23 of the 23 references it cites were found in a registry or an index.
Tensile Lattice Strain Accelerates Oxygen Surface Exchange and Diffusion in La1–xSrxCoO3−δ Thin Films
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The influence of lattice strain on the oxygen exchange kinetics and diffusion in oxides was investigated on (100) epitaxial La1-xSrxCoO3-δ (LSC) thin films grown by pulsed laser deposition. Planar tensile and compressively strained LSC films were obtained on single-crystalline SrTiO3 and LaAlO3. 18O isotope exchange depth profiling with ToF-SIMS was employed to simultaneously measure the tracer surface exchange coefficient k* and the tracer diffusion coefficient D* in the temperature range 280-475 °C. In accordance with recent theoretical findings, much faster surface exchange (∼4 times) and diffusion (∼10 times) were observed for the tensile strained films compared to the compressively strained films in the entire temperature range. The same strain effect--tensile strain leading to higher k* and D*--was found for different LSC compositions (x=0.2 and x=0.4) and for surface-etched films. The temperature dependence of k* and D* is discussed with respect to the contributions of strain states, formation enthalpy of oxygen vacancies, and vacancy mobility at different temperatures. Our findings point toward the control of oxygen surface exchange and diffusion kinetics by means of lattice strain in existing mixed conducting oxides for energy conversion applications.
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Self-citation
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Metadata
- Authors
- Kubicek, M., Cai, Z., Ma, W., Yildiz, B., Hutter, H., & Fleig, J.
- Venue
- ACS Nano
- Publisher
- American Chemical Society (ACS)
- Published
- 2013-04-03
- Volume
- 7
- Issue
- 4
- Pages
- 3276-3286
- ISSN
- 1936-0851 (ISSN-L)
- 1936-086X
- OpenAlex
- W2146105797
- Cited by
- 263
- References
- 23
- FWCI
- 10.21
- Type
- journal article
- Language
- en
- Open access
- hybrid
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