Work

Size Dependence of the Band Gap of Core–Shell Tantalum and Tantalum Oxide (V) Nanoclusters

Year: 2024

Type: article

Abstract: Monodisperse films of spherical tantalum oxide (V) nanoclusters and spherical tantalum nanoclusters with a tantalum oxide shell with diameters of 1.4-8 nm were obtained by magnetron sputtering. The size of the deposited nanoclusters was controlled using a quadrupole mass filter. The chemical composition was certified using the XPS method. Using the Reflected Electron Energy Loss Spectroscopy (REELS), the dependence of the band gap width on the nanocluster size was determined. It was found that starting from a certain nanocluster size, the band gap width increases as the nanocluster size decreases. Based on experimental data and a theoretical model, the effective mass of electrons dependence as a function of nanocluster size was obtained.

Source: Nanomaterials

DOI: 10.3390/nano15010014

Authors: Valentin A. Shilov, Petr V. Borisyuk, Diana V. Bortko, Smagul Karazhanov, Yuri Y. Lebedinskii, Oleg S. Vasilyev

Institutions: National Research Nuclear University MEPhI, Institute for Energy Technology, Moscow Institute of Physics and Technology

Language: English

Topic: Chemical and Physical Properties of Materials

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $3,296

Funder: Russian Science Foundation