Sub-nA spatially resolved conductivity profiling of surface and interface defects in ceria films
Source abstract
Abstract
Spatial variability of conductivity in ceria is explored using scanning probe microscopy 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 suggest 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 systems including memristors and electroresistors, as well as physical systems such as ferroelectric tunneling barriers.
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Research context
OpenAlex topics: Advanced Memory and Neural Computing · Electronic and Structural Properties of Oxides · Electrochemical Analysis and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Queen’s University Belfast 1 Centre for Nanostructured Media, School of Mathematics and Physics, , Belfast BT7 1NN, United Kingdom
Università degli studi Niccolò Cusano 2 CNR-SPIN and Engineering Faculty, , Rome I-00166, Italy
Università di Roma Tor Vergata 3 CNR-SPIN and DICCI Dipartiment, , Via del Politecnico 1, I-00133 Rome, Italy
Oak Ridge National Laboratory 4 Center for Nanophase Materials Sciences, , Oak Ridge, Tennessee 37831, USA
Salve Regina University 5 Chemistry Department, , Newport, Rhode Island 02840, USA
Funding
Royal Society
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