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Elongation of metallic nanoparticles at the interface of silicon dioxide and silicon nitride

Mota-Santiago, Pablo LU ; Kremer, Felipe ; Nadzri, Allina ; Ridgway, Mark Cameron and Kluth, Patrick (2017) In Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms 409. p.328-332
Abstract

In the process of shape transformation of metal nanoparticles (MNPs) embedded in dielectrics resulting from swift heavy-ion irradiation, key parameters such as the energy deposition threshold, the necessity of a molten track and the NP size have been identified for amorphous silicon dioxide. The extension of such parameters to other dielectrics is yet unclear. We present experimental evidence of the shape transformation of nearly spherical NPs located at the interface of amorphous silicon nitride and silicon dioxide thin layers upon irradiation with 185 MeV Au ions at fluences of 0.3 and 1 × 1014 cm−2. After irradiation the ∼16–18 nm diameter Au and Ag NPs transformed into continuous nano-rods exhibiting a high... (More)

In the process of shape transformation of metal nanoparticles (MNPs) embedded in dielectrics resulting from swift heavy-ion irradiation, key parameters such as the energy deposition threshold, the necessity of a molten track and the NP size have been identified for amorphous silicon dioxide. The extension of such parameters to other dielectrics is yet unclear. We present experimental evidence of the shape transformation of nearly spherical NPs located at the interface of amorphous silicon nitride and silicon dioxide thin layers upon irradiation with 185 MeV Au ions at fluences of 0.3 and 1 × 1014 cm−2. After irradiation the ∼16–18 nm diameter Au and Ag NPs transformed into continuous nano-rods exhibiting a high aspect ratio with a clear preference of elongation into the silicon dioxide layer. The results are discussed in the context of Thermal Spike calculations, which indicate that the track formation timescales may have an important influence on the NP elongation process.

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author
; ; ; and
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Anisotropy, Elongation, Ion-irradiation, Metallic nanoparticles, TEM
in
Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
volume
409
pages
5 pages
publisher
Elsevier
external identifiers
  • scopus:85015766160
ISSN
0168-583X
DOI
10.1016/j.nimb.2017.03.068
language
English
LU publication?
no
additional info
Publisher Copyright: © 2017 Elsevier B.V.
id
0586e411-27d0-4068-ad96-e92f450e25f9
date added to LUP
2023-04-05 16:18:48
date last changed
2023-05-26 15:28:58
@article{0586e411-27d0-4068-ad96-e92f450e25f9,
  abstract     = {{<p>In the process of shape transformation of metal nanoparticles (MNPs) embedded in dielectrics resulting from swift heavy-ion irradiation, key parameters such as the energy deposition threshold, the necessity of a molten track and the NP size have been identified for amorphous silicon dioxide. The extension of such parameters to other dielectrics is yet unclear. We present experimental evidence of the shape transformation of nearly spherical NPs located at the interface of amorphous silicon nitride and silicon dioxide thin layers upon irradiation with 185 MeV Au ions at fluences of 0.3 and 1 × 10<sup>14</sup> cm<sup>−2</sup>. After irradiation the ∼16–18 nm diameter Au and Ag NPs transformed into continuous nano-rods exhibiting a high aspect ratio with a clear preference of elongation into the silicon dioxide layer. The results are discussed in the context of Thermal Spike calculations, which indicate that the track formation timescales may have an important influence on the NP elongation process.</p>}},
  author       = {{Mota-Santiago, Pablo and Kremer, Felipe and Nadzri, Allina and Ridgway, Mark Cameron and Kluth, Patrick}},
  issn         = {{0168-583X}},
  keywords     = {{Anisotropy; Elongation; Ion-irradiation; Metallic nanoparticles; TEM}},
  language     = {{eng}},
  month        = {{10}},
  pages        = {{328--332}},
  publisher    = {{Elsevier}},
  series       = {{Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms}},
  title        = {{Elongation of metallic nanoparticles at the interface of silicon dioxide and silicon nitride}},
  url          = {{http://dx.doi.org/10.1016/j.nimb.2017.03.068}},
  doi          = {{10.1016/j.nimb.2017.03.068}},
  volume       = {{409}},
  year         = {{2017}},
}