Plasma and Fusion Research

Volume 19, 1406004 (2024)

Regular Articles

Electron Beam-Induced Reduction of Silver on TiO₂ Film

Arantxa Danielle S. MONTALLANA¹⁾, Lance Tristan Oliver R. PENGSON²⁾, Mark D. ILASIN²⁾, Magdaleno R. VASQUEZ Jr.²⁾ and Motoi WADA¹⁾

1): Doshisha University, Kyotanabe, Kyoto 610-0321, Japan
2): University of the Philippines, Diliman, Quezon City 1101, Philippines

(Received 15 September 2023 / Accepted 27 November 2023 / Published 27 February 2024)

Abstract

A broad, low-energy electron beam extracted from a multi-cusp plasma source through a pair of mesh electrodes produced metallic silver (Ag) from the Ag compound prepared on the surface of titanium dioxide (TiO₂) thin films. The TiO₂ films were grown by thermal oxidation of magnetron-sputtered titanium (Ti) films. The reduced metallic Ag formed the Ag-TiO₂ heterostructure. The reduction of the Ag compound was investigated by varying the operating pressure and the electron beam exposure time. The electron energy distribution function was measured using a retarding potential analyzer, while the electron current density measurements were obtained by collecting the electrons passing through the aperture of a shielded Faraday cup. Characterization of the synthesized heterostructure was performed using X-ray diffraction and Raman spectroscopy to check the chemical structure and composition, UV-Vis spectroscopy and 4-point probe to investigate the optoelectronic properties, and electron microscopy to observe the surface morphology of the films. The electron beam characteristics were correlated with the structure and properties of the synthesized Ag-TiO₂ heterostructure.

Keywords

electron beam, EEDF, silver reduction, titanium dioxide

DOI: 10.1585/pfr.19.1406004

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