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arXiv · 2104.14774

Electrostatic potential measurement at the Pt/TiO$_2$ interface using electron holography

Hiroshi Nakajima·Toshiaki Tanigaki·Takaaki Toriyama·Mahito Yamamoto·Hidekazu Tanaka·Yasukazu Murakami
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Abstract

The interface of Pt/TiO$_2$ plays an essential role in device engineering and chemical reactions. Here, we report the electrostatic potential distribution of a Pt/TiO$_2$ interface by electron holography. The decrease of the electrostatic potential exists at TiO$_2$ in the vicinity of the interface, indicating the presence of negative charge due to electron transfer from TiO$_2$ and Pt. The decrease of the electrostatic potential can be understood in the difference in work functions between Pt and TiO$_2$. This study reveals the interplay between Pt and TiO$_2$ and the usefulness of electron holography for probing the potential in nanoscale interfaces.

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Hiroshi Nakajima, Toshiaki Tanigaki, Takaaki Toriyama, Mahito Yamamoto, Hidekazu Tanaka, Yasukazu Murakami. 2021-04-30. Electrostatic potential measurement at the Pt/TiO$_2$ interface using electron holography. https://doi.org/10.1063/5.0046501

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