Electrostatic potential measurement at the Pt/TiO2 interface using electron holography

The interface of Pt/TiO2 plays an essential role in device engineering and chemical reactions. Here, we report the electrostatic potential distribution of a Pt/TiO2 interface by electron holography. The decrease in the electrostatic potential exists at TiO2 in the vicinity of the interface, indicati...

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Bibliographic Details
Published in:Journal of applied physics 2021-05, Vol.129 (17)
Main Authors: Nakajima, Hiroshi, Tanigaki, Toshiaki, Toriyama, Takaaki, Yamamoto, Mahito, Tanaka, Hidekazu, Murakami, Yasukazu
Format: Article
Language:English
Subjects:
Applied physics
Charge transfer
Chemical reactions
Electron transfer
Electrons
Holography
Interfaces
Titanium dioxide
Work functions
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Summary:The interface of Pt/TiO2 plays an essential role in device engineering and chemical reactions. Here, we report the electrostatic potential distribution of a Pt/TiO2 interface by electron holography. The decrease in the electrostatic potential exists at TiO2 in the vicinity of the interface, indicating the presence of negative charge due to electron transfer from TiO2 and Pt. The decrease in the electrostatic potential can be understood in the difference in work functions between Pt and TiO2. This study reveals the interplay between Pt and TiO2 and the usefulness of electron holography for probing the potential in nanoscale interfaces.
ISSN:0021-8979
1089-7550
DOI:10.1063/5.0046501