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Microstructure and Optical Properties of Nanostructural Thin Films Fabricated through Oxidation of Au-Sn Intermetallic Compounds.


ABSTRACT: AuSn and AuSn2 thin films (5 nm) were used as precursors during the formation of semiconducting metal oxide nanostructures on a silicon substrate. The nanoparticles were produced in the processes of annealing and oxidation of gold-tin intermetallic compounds under ultra-high vacuum conditions. The formation process and morphology of a mixture of SnO2 and Au@SnOx (the core-shell structure) nanoparticles or Au nanocrystalites were carefully examined by means of spectroscopic ellipsometry (SE), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and transmission electron microscopy (TEM) combined with energy-dispersive X-ray spectroscopy (EDX). The annealing and oxidation of the thin film of the AuSn intermetallic compound led to the formation of uniformly distributed structures with a size of ∼20-30 nm. All of the synthesized nanoparticles exhibited a strong absorption band at 520-530 nm, which is typical for pure metallic or metal oxide systems.

SUBMITTER: Skowronski L 

PROVIDER: S-EPMC8307610 | biostudies-literature | 2021 Jul

REPOSITORIES: biostudies-literature

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Microstructure and Optical Properties of Nanostructural Thin Films Fabricated through Oxidation of Au-Sn Intermetallic Compounds.

Skowronski Lukasz L   Trzcinski Marek M   Olszewska Aleksandra A   Szczesny Robert R  

Materials (Basel, Switzerland) 20210719 14


AuSn and AuSn<sub>2</sub> thin films (5 nm) were used as precursors during the formation of semiconducting metal oxide nanostructures on a silicon substrate. The nanoparticles were produced in the processes of annealing and oxidation of gold-tin intermetallic compounds under ultra-high vacuum conditions. The formation process and morphology of a mixture of SnO<sub>2</sub> and Au@SnO<sub><i>x</i></sub> (the core-shell structure) nanoparticles or Au nanocrystalites were carefully examined by means  ...[more]

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