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Proceedings Paper

Growth of Bi2O3 nanocones over large areas by magnetron sputtering
Author(s): Li-Chia Tien; Ying-Hong Liou
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Paper Abstract

Bismuth oxide (Bi2O3) is a multi-functional oxide semiconductor with various properties of interest such as high reflective index, high photoconductive response, luminescence and high oxygen-ion conductivity, potentially useful as optical coatings, electrodes of solid oxide fuel cells (SOFC), supercapacitors, visible-light activated photocatalysts, and gas sensors. Large areas of bismuth oxide (Bi2O3) nanocones were grown onto Si(001) substrates by magnetron sputtering. The samples were characterized by field emission scanning electron microscopy (FE-SEM), X-ray diffraction (XRD), transmission electron microscopy (TEM), and photoluminescence (PL). The obtained tapered nanostructures consist of high-density nanocones with diameters approximately 70–130 nm and lengths of 1–3 μm. XRD results reveal that the Bi2O3 nanocones can undergo a phase transition from the α to the β phase at growth temperatures over 450°C. This phase transition was confirmed by TEM and PL. The growth mechanism of Bi2O3 nanocones was identified as grain boundary-assisted growth, in which a Bi seeding layer is crucial to the formation of the nanostructures. The results herein suggest that introducing a surface seeding layer may provide an effective way to grow various 1D nanostructures over large areas in high yield by magnetron sputtering.

Paper Details

Date Published: 20 August 2015
PDF: 7 pages
Proc. SPIE 9558, Nanostructured Thin Films VIII, 95580X (20 August 2015); doi: 10.1117/12.2186534
Show Author Affiliations
Li-Chia Tien, National Dong Hwa Univ. (Taiwan)
Ying-Hong Liou, National Dong Hwa Univ. (Taiwan)

Published in SPIE Proceedings Vol. 9558:
Nanostructured Thin Films VIII
Akhlesh Lakhtakia; Tom G. Mackay; Motofumi Suzuki, Editor(s)

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