Polarization-dependence of the Raman response of free-standing strained Ce0.8Gd0.2O2 membranes

Konetschny, Alexander; Weinhold, Marcel; Heiliger, Christian; Elm, Matthias T.; Klar, Peter J.

doi:10.1039/d1cp00176k

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“…Thus, the red shift of the F 2g mode observed for decreasing coating thickness suggests a smaller grain size for the 3 nm CeO 2 . However, strain effects arising at the CeO 2 /YSZ interface may be responsible for the broadening and shift of the F 2g mode too …”

Section: Resultsmentioning

confidence: 99%

“…However, strain effects arising at the CeO 2 /YSZ interface may be responsible for the broadening and shift of the F 2g mode too. 78 The homogeneity of the CeO 2 coating throughout the films was examined by time-of-flight-secondary ion mass spectrometry (ToF-SIMS). Figure 3a shows depth profiles for YSZ_1 and YSZ_3 after the deposition of 3 and 7 nm CeO 2 .…”

Section: Resultsmentioning

confidence: 99%

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Design of Ordered Mesoporous CeO₂–YSZ Nanocomposite Thin Films with Mixed Ionic/Electronic Conductivity via Surface Engineering

et al. 2022

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Mixed ionic and electronic conductors represent a technologically relevant materials system for electrochemical device applications in the field of energy storage and conversion. Here, we report about the design of mixed-conducting nanocomposites by facile surface modification using atomic layer deposition (ALD). ALD is the method of choice, as it allows coating of even complex surfaces. Thermally stable mesoporous thin films of 8 mol-% yttria-stabilized zirconia (YSZ) with different pore sizes of 17, 24, and 40 nm were prepared through an evaporation-induced self-assembly process. The free surface of the YSZ films was uniformly coated via ALD with a ceria layer of either 3 or 7 nm thickness. Electrochemical impedance spectroscopy was utilized to probe the influence of the coating on the charge-transport properties. Interestingly, the porosity is found to have no effect at all. In contrast, the thickness of the ceria surface layer plays an important role. While the nanocomposites with a 7 nm coating only show ionic conductivity, those with a 3 nm coating exhibit mixed conductivity. The results highlight the possibility of tailoring the electrical transport properties by varying the coating thickness, thereby providing innovative design principles for the next-generation electrochemical devices.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Design of Ordered Mesoporous CeO₂–YSZ Nanocomposite Thin Films with Mixed Ionic/Electronic Conductivity via Surface Engineering

et al. 2022

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Polarization-dependence of the Raman response of free-standing strained Ce_0.8Gd_0.2O₂ membranes

Abstract: Square-shaped Ce0.8Gd0.2O2 (GDC) membranes are prepared by microstructuring techniques from (111)-oriented, polycrystalline GDC thin films. The strain state of the membranes is investigated by micro-Raman mapping using polarized excitation light....

Cited by 1 publication

References 57 publications

Design of Ordered Mesoporous CeO₂–YSZ Nanocomposite Thin Films with Mixed Ionic/Electronic Conductivity via Surface Engineering

Design of Ordered Mesoporous CeO₂–YSZ Nanocomposite Thin Films with Mixed Ionic/Electronic Conductivity via Surface Engineering

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Polarization-dependence of the Raman response of free-standing strained Ce0.8Gd0.2O2 membranes

Abstract: Square-shaped Ce0.8Gd0.2O2 (GDC) membranes are prepared by microstructuring techniques from (111)-oriented, polycrystalline GDC thin films. The strain state of the membranes is investigated by micro-Raman mapping using polarized excitation light....

Cited by 1 publication

References 57 publications

Design of Ordered Mesoporous CeO2–YSZ Nanocomposite Thin Films with Mixed Ionic/Electronic Conductivity via Surface Engineering

Design of Ordered Mesoporous CeO2–YSZ Nanocomposite Thin Films with Mixed Ionic/Electronic Conductivity via Surface Engineering

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Polarization-dependence of the Raman response of free-standing strained Ce_0.8Gd_0.2O₂ membranes

Design of Ordered Mesoporous CeO₂–YSZ Nanocomposite Thin Films with Mixed Ionic/Electronic Conductivity via Surface Engineering

Design of Ordered Mesoporous CeO₂–YSZ Nanocomposite Thin Films with Mixed Ionic/Electronic Conductivity via Surface Engineering