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Papers by Dane Morgan
The Journal of Physical Chemistry C, 2021
Computational Materials Science, 2021
APL Materials, 2020
The work function is one of the most fundamental surface properties of a material, and understand... more The work function is one of the most fundamental surface properties of a material, and understanding and controlling its value is of central importance for manipulating electron flow in applications ranging from high power vacuum electronics to oxide electronics and solar cells. Recent computational studies using Density Functional Theory (DFT) have demonstrated that DFT-calculated work function values for metals tend to agree well (within about 0.3 eV on average) with experimental values. However, a detailed validation of DFT-calculated work functions for oxide materials has not been conducted and is challenging due to the complex dipole structures that can occur on oxide surfaces. In this work, we have focused our investigation on the widely studied perovskite SrTiO3 as a case study example. We find that DFT can accurately predict the work function values of clean and reconstructed SrTiO3 surfaces vs experiment at about the same level of accuracy as metals when direct comparisons ...
The Journal of Physical Chemistry C, 2020
ECS Meeting Abstracts, 2013
Computational Materials Science, 2020
Physical Review Applied, 2017
Journal of Nuclear Materials, 2019
IEEE Transactions on Electron Devices, 2018
Journal of Nuclear Materials, 2018
Microscopy and Microanalysis, 2017
Computational Materials Science, 2017
Accounts of chemical research, May 17, 2016
Electrocatalysts play an important role in catalyzing the kinetics for oxygen reduction and oxyge... more Electrocatalysts play an important role in catalyzing the kinetics for oxygen reduction and oxygen evolution reactions for many air-based energy storage and conversion devices, such as metal-air batteries and fuel cells. Although noble metals have been extensively used as electrocatalysts, their limited natural abundance and high costs have motivated the search for more cost-effective catalysts. Oxides are suitable candidates since they are relatively inexpensive and have shown reasonably high activity for various electrochemical reactions. However, a lack of fundamental understanding of the reaction mechanisms has been a major hurdle toward improving electrocatalytic activity. Detailed studies of the oxide surface atomic structure and chemistry (e.g., cation migration) can provide much needed insights for the design of highly efficient and stable oxide electrocatalysts. In this Account, we focus on recent advances in characterizing strontium (Sr) cation segregation and enrichment n...
The Journal of Physical Chemistry C, 2021
Computational Materials Science, 2021
APL Materials, 2020
The work function is one of the most fundamental surface properties of a material, and understand... more The work function is one of the most fundamental surface properties of a material, and understanding and controlling its value is of central importance for manipulating electron flow in applications ranging from high power vacuum electronics to oxide electronics and solar cells. Recent computational studies using Density Functional Theory (DFT) have demonstrated that DFT-calculated work function values for metals tend to agree well (within about 0.3 eV on average) with experimental values. However, a detailed validation of DFT-calculated work functions for oxide materials has not been conducted and is challenging due to the complex dipole structures that can occur on oxide surfaces. In this work, we have focused our investigation on the widely studied perovskite SrTiO3 as a case study example. We find that DFT can accurately predict the work function values of clean and reconstructed SrTiO3 surfaces vs experiment at about the same level of accuracy as metals when direct comparisons ...
The Journal of Physical Chemistry C, 2020
ECS Meeting Abstracts, 2013
Computational Materials Science, 2020
Physical Review Applied, 2017
Journal of Nuclear Materials, 2019
IEEE Transactions on Electron Devices, 2018
Journal of Nuclear Materials, 2018
Microscopy and Microanalysis, 2017
Computational Materials Science, 2017
Accounts of chemical research, May 17, 2016
Electrocatalysts play an important role in catalyzing the kinetics for oxygen reduction and oxyge... more Electrocatalysts play an important role in catalyzing the kinetics for oxygen reduction and oxygen evolution reactions for many air-based energy storage and conversion devices, such as metal-air batteries and fuel cells. Although noble metals have been extensively used as electrocatalysts, their limited natural abundance and high costs have motivated the search for more cost-effective catalysts. Oxides are suitable candidates since they are relatively inexpensive and have shown reasonably high activity for various electrochemical reactions. However, a lack of fundamental understanding of the reaction mechanisms has been a major hurdle toward improving electrocatalytic activity. Detailed studies of the oxide surface atomic structure and chemistry (e.g., cation migration) can provide much needed insights for the design of highly efficient and stable oxide electrocatalysts. In this Account, we focus on recent advances in characterizing strontium (Sr) cation segregation and enrichment n...