GaSb nanowires grown on a Si substrate and nanolaminatate TiO2/Ag/TiO2 structure

Authors

Malina Milanova, Central Laboratory of Applied Physics, Bulgarian Academy of Sciences, 61 Sankt Petersburg Blvd, 4000 Plovdiv, Bulgaria
Petko Vitanov, Central Laboratory of Solar Energy and New Energy Sources, Bulgarian Academy of Sciences, 72 Tzarigradsko Chaussee Blvd, 1784 Sofia, Bulgaria
Nikolay Petkov, Physical Sciences Department, Munster Technological University (MTU), Rosa Avenue, Bishopstown, Cork T12 P928, Ireland; Tyndall National Institute, Lee Maltings, Cork T12 R5CP, IrelandFollow
Kiril Kirilov, Faculty of Physics, St. Kliment Ohridski University of Sofia, 5 James Bourchier Blvd. 1164 Sofia, Bulgaria
Hristosko Dikov, Central Laboratory of Solar Energy and New Energy Sources, Bulgarian Academy of Sciences, 72 Tzarigradsko Chaussee Blvd, 1784 Sofia, Bulgaria
Pavlina Ralova, Central Laboratory of Applied Physics, Bulgarian Academy of Sciences, 61 Sankt Petersburg Blvd, 4000 Plovdiv, Bulgaria

ORCID

https://orcid.org/0000-0002-5539-9595

Abstract

This paper presents a comparative study of GaSb nanowire (NWs) growth on a Si substrate using Ag nanoparticles as catalyst and on a Si substrate coated with a transparent conductive TiO2/Ag/TiO2 laminate structure. Silver nanoparticles with different sizes between 30 and 70 nm were formed directly on Si surface or embedded between two TiO2 layers by RF magnetron sputtering. A thermal evaporation method was used to grow GaSb NWs via vapor–liquid-solid (VLS) mechanism. Scanning electron microscopy (SEM) and atomic force microscopy (AFM) were used to study the surface morphology of the grown structures. Two kinds of nanostructures were observed on the surface of the Ag/Si substrate: nanowires and nanoislands of different sizes and random position, while mostly nanowires were visible for GaSb grown on TiO2/Ag/TiO2/Si substrate.

Raman spectroscopy measurements were used to investigate vibrational mods and phonon confinement in the grown nanostructures. The results demonstrate that TiO2/Ag/TiO2/ nanolaminate structure is a promising substrate for nanowires growth. The technology for obtaining this nanolaminate structure allows the formation of local areas with micron dimensions, using a mask as a pattern structure during the deposition of Ag nanoparticles.

Disciplines

Physics

DOI

10.1016/j.apsusc.2024.161543

Full Publication Date

2025

Publication Details

Applied Surface Science

Publisher

Elsevier

Funder Name 1

Operational Programme “Science and Education For Smart Growth”, 2014–2020

Award Number 1

BG05M2OP001-1.002-0014

Funder Name 2

European Regional Development Fund (ERDF)

Funder Name 3

European Commission

Award Number 3

BG-RRP-2.004-0008-C01

Resource Type

journal article

Resource Version

http://purl.org/coar/version/c_970fb48d4fbd8a85

Access Rights

open access

Open Access Route

Hybrid Open Access

License Condition

This work is licensed under a Creative Commons Attribution-NonCommercial-No Derivative Works 4.0 International License.

Alternative Identifier

https://www.sciencedirect.com/science/article/pii/S016943322402258X

Recommended Citation

Malina Milanova, Petko Vitanov, Nikolay Petkov, Kiril Kirilov, Hristosko Dikov, Pavlina Ralova, GaSb nanowires grown on a Si substrate and nanolaminatate TiO2/Ag/TiO2 structure, Applied Surface Science,Volume 681,2025, https://doi.org/10.1016/j.apsusc.2024.161543.