Abstract
Spatial variability of conductivity in ceria is explored using scanning probe microscopy (SPM) with galvanostatic control. Ionically blocking electrodes are used to probe the conductivity under opposite polarities to reveal possible differences in the defect structure across a thin film of CeO2. Data suggests the existence of a large spatial inhomogeneity that could give rise to constant phase elements during standard electrochemical characterization, potentially affecting the overall conductivity of films on the macroscale. The approach discussed here can also be utilized for other mixed ionic electronic conductor (MIEC) systems including memristors and electroresistors, as well as physical systems such as ferroelectric tunneling barriers.
Original language | English |
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Number of pages | 7 |
Journal | APL Materials |
Volume | 3 |
Issue number | 3 |
Early online date | 17 Mar 2015 |
DOIs | |
Publication status | Published - 2015 |
Keywords
- Cerium Oxide
- ATOMIC FORCE MICROSCOPY
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Dive into the research topics of 'Sub-nA spatially resolved conductivity profiling of surface and interface defects in ceria films'. Together they form a unique fingerprint.Student theses
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Probing electrochemical functionality on the nanoscale via current detection approaches
Farrow, T. (Author), Gregg, J. (Supervisor) & Kumar, A. (Supervisor), Jul 2020Student thesis: Doctoral Thesis › Doctor of Philosophy
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