Swift heavy ion irradiation of Pt nanocrystals embedded in SiO2

R. Giulian; P. Kluth; D. J. Sprouster; L. L. Araujo; A. Byrne; M. C. Ridgway

doi:10.1016/j.nimb.2008.03.176

Swift heavy ion irradiation of Pt nanocrystals embedded in SiO₂

R. Giulian^*, P. Kluth, D. J. Sprouster, L. L. Araujo, A. Byrne, M. C. Ridgway

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

21 Citations (Scopus)

Abstract

Pt nanocrystals (NCs) formed by ion implantation in SiO₂ were irradiated with 185 MeV Au ions in the fluence range from 2 × 10¹² to 6 × 10¹⁴ cm^-2. Transmission electron microscopy (TEM) shows that spherical Pt NCs with diameter smaller than a certain threshold (∼70 Å) do not change in shape, but decrease in size with increasing irradiation fluence until dissolved in the matrix. On the other hand, NCs larger than ∼70 Å change from spheres (unirradiated) to prolate spheroids (2 × 10¹³ cm^-2), finally achieving a rod-like shape with the major axis aligned parallel to the beam direction for fluences up to ∼10¹⁴ cm^-2. The NC minor dimension decreases with increasing irradiation fluence, resulting in a nearly monodispersed distribution with mean value around 70 Å, while at the same time the major dimension increases significantly resulting in the formation of rod-like NCs with aspect ratio as great as 10.

Original language	English
Pages (from-to)	3158-3161
Number of pages	4
Journal	Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Volume	266
Issue number	12-13
DOIs	https://doi.org/10.1016/j.nimb.2008.03.176
Publication status	Published - Jun 2008

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@article{e33824586c02469da97f12f2e6796045,

title = "Swift heavy ion irradiation of Pt nanocrystals embedded in SiO2",

abstract = "Pt nanocrystals (NCs) formed by ion implantation in SiO2 were irradiated with 185 MeV Au ions in the fluence range from 2 × 1012 to 6 × 1014 cm-2. Transmission electron microscopy (TEM) shows that spherical Pt NCs with diameter smaller than a certain threshold (∼70 {\AA}) do not change in shape, but decrease in size with increasing irradiation fluence until dissolved in the matrix. On the other hand, NCs larger than ∼70 {\AA} change from spheres (unirradiated) to prolate spheroids (2 × 1013 cm-2), finally achieving a rod-like shape with the major axis aligned parallel to the beam direction for fluences up to ∼1014 cm-2. The NC minor dimension decreases with increasing irradiation fluence, resulting in a nearly monodispersed distribution with mean value around 70 {\AA}, while at the same time the major dimension increases significantly resulting in the formation of rod-like NCs with aspect ratio as great as 10.",

keywords = "Pt nanocrystals, Swift heavy ion irradiation, TEM",

author = "R. Giulian and P. Kluth and Sprouster, {D. J.} and Araujo, {L. L.} and A. Byrne and Ridgway, {M. C.}",

year = "2008",

month = jun,

doi = "10.1016/j.nimb.2008.03.176",

language = "English",

volume = "266",

pages = "3158--3161",

journal = "Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms",

issn = "0168-583X",

publisher = "Elsevier B.V.",

number = "12-13",

}

TY - JOUR

T1 - Swift heavy ion irradiation of Pt nanocrystals embedded in SiO2

AU - Giulian, R.

AU - Kluth, P.

AU - Sprouster, D. J.

AU - Araujo, L. L.

AU - Byrne, A.

AU - Ridgway, M. C.

PY - 2008/6

Y1 - 2008/6

N2 - Pt nanocrystals (NCs) formed by ion implantation in SiO2 were irradiated with 185 MeV Au ions in the fluence range from 2 × 1012 to 6 × 1014 cm-2. Transmission electron microscopy (TEM) shows that spherical Pt NCs with diameter smaller than a certain threshold (∼70 Å) do not change in shape, but decrease in size with increasing irradiation fluence until dissolved in the matrix. On the other hand, NCs larger than ∼70 Å change from spheres (unirradiated) to prolate spheroids (2 × 1013 cm-2), finally achieving a rod-like shape with the major axis aligned parallel to the beam direction for fluences up to ∼1014 cm-2. The NC minor dimension decreases with increasing irradiation fluence, resulting in a nearly monodispersed distribution with mean value around 70 Å, while at the same time the major dimension increases significantly resulting in the formation of rod-like NCs with aspect ratio as great as 10.

AB - Pt nanocrystals (NCs) formed by ion implantation in SiO2 were irradiated with 185 MeV Au ions in the fluence range from 2 × 1012 to 6 × 1014 cm-2. Transmission electron microscopy (TEM) shows that spherical Pt NCs with diameter smaller than a certain threshold (∼70 Å) do not change in shape, but decrease in size with increasing irradiation fluence until dissolved in the matrix. On the other hand, NCs larger than ∼70 Å change from spheres (unirradiated) to prolate spheroids (2 × 1013 cm-2), finally achieving a rod-like shape with the major axis aligned parallel to the beam direction for fluences up to ∼1014 cm-2. The NC minor dimension decreases with increasing irradiation fluence, resulting in a nearly monodispersed distribution with mean value around 70 Å, while at the same time the major dimension increases significantly resulting in the formation of rod-like NCs with aspect ratio as great as 10.

KW - Pt nanocrystals

KW - Swift heavy ion irradiation

KW - TEM

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U2 - 10.1016/j.nimb.2008.03.176

DO - 10.1016/j.nimb.2008.03.176

M3 - Article

SN - 0168-583X

VL - 266

SP - 3158

EP - 3161

JO - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms

JF - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms

IS - 12-13

ER -

Swift heavy ion irradiation of Pt nanocrystals embedded in SiO₂

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