A1 Journal article (refereed)
Elongation and plasmonic activity of embedded metal nanoparticles following heavy ion irradiation (2023)

Korkos, S., Arstila, K., Tapio, K., Kinnunen, S., Toppari, J. J., & Sajavaara, T. (2023). Elongation and plasmonic activity of embedded metal nanoparticles following heavy ion irradiation. RSC Advances, 13(9), 5851-5858. https://doi.org/10.1039/D3RA00573A

JYU authors or editors

Korkos, Spyridon
Arstila, Kai
Tapio, Kosti
Kinnunen, Sami
Toppari, Jussi
Sajavaara, Timo

Publication details

All authors or editors: Korkos, Spyridon; Arstila, Kai; Tapio, Kosti; Kinnunen, Sami; Toppari, J. Jussi; Sajavaara, Timo

Journal or series: RSC Advances

eISSN: 2046-2069

Publication year: 2023

Publication date: 16/02/2023

Volume: 13

Issue number: 9

Pages range: 5851-5858

Publisher: Royal Society of Chemistry (RSC)

Publication country: United Kingdom

Publication language: English

DOI: https://doi.org/10.1039/D3RA00573A

Publication open access: Openly available

Publication channel open access: Open Access channel

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/85617

Abstract

Shape modification of embedded nanoparticles by swift heavy ion (SHI) irradiation is an effective way to produce nanostructures with controlled size, shape, and orientation. In this study, randomly oriented gold nanorods embedded in SiO2 are shown to re-orient along the ion beam direction. The degree of orientation depends on the irradiation conditions and the nanorod's initial size. SHI irradiation was also applied to modify spherical metallic nanoparticles embedded in Al2O3. The results showed that they elongate due to the irradiation comparably to those embedded in SiO2. Metallic nanostructures embedded in dielectric matrices can exhibit localized surface plasmon (LSP) modes. The elongated nanoparticles investigated by means of dark-field spectroscopy showed two discrete peaks which correspond to longitudinal and transverse modes.

Keywords: nanoparticles; nanostructures; nanotechnology; ionising radiation; surface plasmons