Changes in metal nanoparticle shape and size induced by swift heavy-ion irradiation

M. C. Ridgway; P. Kluth; R. Giulian; D. J. Sprouster; L. L. Araujo; C. S. Schnohr; D. J. Llewellyn; A. P. Byrne; G. J. Foran; D. J. Cookson

doi:10.1016/j.nimb.2009.02.025

Changes in metal nanoparticle shape and size induced by swift heavy-ion irradiation

M. C. Ridgway^*, P. Kluth, R. Giulian, D. J. Sprouster, L. L. Araujo, C. S. Schnohr, D. J. Llewellyn, A. P. Byrne, G. J. Foran, D. J. Cookson

^*Corresponding author for this work

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

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Abstract

Changes in the shape and size of Co, Pt and Au nanoparticles induced by swift heavy-ion irradiation (SHII) have been characterized using a combination of transmission electron microscopy, small-angle X-ray scattering and X-ray absorption near-edge structure. Elemental nanoparticles of diameters 2-15 nm were first formed in amorphous SiO₂ by ion implantation and thermal annealing and then irradiated at room temperature with 27-185 MeV Au ions as a function of fluence. Spherical nanoparticles below a minimum diameter (4-7 nm) remained spherical under SHII but progressively decreased in size as a result of dissolution into the SiO₂ matrix. Spherical nanoparticles above the minimum diameter threshold were transformed to elongated rods aligned with the ion beamdirection. The nanorod width saturated at an electronic energy deposition dependent value, progressively increasing from 4-6 to 7-10 nm (at 5-18 keV/nm, respectively) while the nanorod length exhibited a broad distribution consistent with that of the unirradiated spherical nanoparticles. The threshold diameter for spherical nanoparticle elongation was comparable to the saturation value of nanorod width. We correlate this saturation value with the diameter of the molten track induced in amorphous SiO₂ by SHII. In summary, changes in nanoparticle shape and size are governed to a large extent by the ion irradiation parameters.

Original language	English
Pages (from-to)	931-935
Number of pages	5
Journal	Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Volume	267
Issue number	6
DOIs	https://doi.org/10.1016/j.nimb.2009.02.025
Publication status	Published - Mar 2009

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Ridgway, M. C., Kluth, P., Giulian, R., Sprouster, D. J., Araujo, L. L., Schnohr, C. S., Llewellyn, D. J., Byrne, A. P., Foran, G. J., & Cookson, D. J. (2009). Changes in metal nanoparticle shape and size induced by swift heavy-ion irradiation. Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms, 267(6), 931-935. https://doi.org/10.1016/j.nimb.2009.02.025

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abstract = "Changes in the shape and size of Co, Pt and Au nanoparticles induced by swift heavy-ion irradiation (SHII) have been characterized using a combination of transmission electron microscopy, small-angle X-ray scattering and X-ray absorption near-edge structure. Elemental nanoparticles of diameters 2-15 nm were first formed in amorphous SiO2 by ion implantation and thermal annealing and then irradiated at room temperature with 27-185 MeV Au ions as a function of fluence. Spherical nanoparticles below a minimum diameter (4-7 nm) remained spherical under SHII but progressively decreased in size as a result of dissolution into the SiO2 matrix. Spherical nanoparticles above the minimum diameter threshold were transformed to elongated rods aligned with the ion beamdirection. The nanorod width saturated at an electronic energy deposition dependent value, progressively increasing from 4-6 to 7-10 nm (at 5-18 keV/nm, respectively) while the nanorod length exhibited a broad distribution consistent with that of the unirradiated spherical nanoparticles. The threshold diameter for spherical nanoparticle elongation was comparable to the saturation value of nanorod width. We correlate this saturation value with the diameter of the molten track induced in amorphous SiO2 by SHII. In summary, changes in nanoparticle shape and size are governed to a large extent by the ion irradiation parameters.",

keywords = "Ion irradiation, Metal nanoparticles, Synchrotron radiation",

author = "Ridgway, {M. C.} and P. Kluth and R. Giulian and Sprouster, {D. J.} and Araujo, {L. L.} and Schnohr, {C. S.} and Llewellyn, {D. J.} and Byrne, {A. P.} and Foran, {G. J.} and Cookson, {D. J.}",

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Ridgway, MC, Kluth, P, Giulian, R, Sprouster, DJ, Araujo, LL, Schnohr, CS, Llewellyn, DJ, Byrne, AP, Foran, GJ & Cookson, DJ 2009, 'Changes in metal nanoparticle shape and size induced by swift heavy-ion irradiation', Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms, vol. 267, no. 6, pp. 931-935. https://doi.org/10.1016/j.nimb.2009.02.025

TY - JOUR

T1 - Changes in metal nanoparticle shape and size induced by swift heavy-ion irradiation

AU - Ridgway, M. C.

AU - Kluth, P.

AU - Giulian, R.

AU - Sprouster, D. J.

AU - Araujo, L. L.

AU - Schnohr, C. S.

AU - Llewellyn, D. J.

AU - Byrne, A. P.

AU - Foran, G. J.

AU - Cookson, D. J.

PY - 2009/3

Y1 - 2009/3

N2 - Changes in the shape and size of Co, Pt and Au nanoparticles induced by swift heavy-ion irradiation (SHII) have been characterized using a combination of transmission electron microscopy, small-angle X-ray scattering and X-ray absorption near-edge structure. Elemental nanoparticles of diameters 2-15 nm were first formed in amorphous SiO2 by ion implantation and thermal annealing and then irradiated at room temperature with 27-185 MeV Au ions as a function of fluence. Spherical nanoparticles below a minimum diameter (4-7 nm) remained spherical under SHII but progressively decreased in size as a result of dissolution into the SiO2 matrix. Spherical nanoparticles above the minimum diameter threshold were transformed to elongated rods aligned with the ion beamdirection. The nanorod width saturated at an electronic energy deposition dependent value, progressively increasing from 4-6 to 7-10 nm (at 5-18 keV/nm, respectively) while the nanorod length exhibited a broad distribution consistent with that of the unirradiated spherical nanoparticles. The threshold diameter for spherical nanoparticle elongation was comparable to the saturation value of nanorod width. We correlate this saturation value with the diameter of the molten track induced in amorphous SiO2 by SHII. In summary, changes in nanoparticle shape and size are governed to a large extent by the ion irradiation parameters.

AB - Changes in the shape and size of Co, Pt and Au nanoparticles induced by swift heavy-ion irradiation (SHII) have been characterized using a combination of transmission electron microscopy, small-angle X-ray scattering and X-ray absorption near-edge structure. Elemental nanoparticles of diameters 2-15 nm were first formed in amorphous SiO2 by ion implantation and thermal annealing and then irradiated at room temperature with 27-185 MeV Au ions as a function of fluence. Spherical nanoparticles below a minimum diameter (4-7 nm) remained spherical under SHII but progressively decreased in size as a result of dissolution into the SiO2 matrix. Spherical nanoparticles above the minimum diameter threshold were transformed to elongated rods aligned with the ion beamdirection. The nanorod width saturated at an electronic energy deposition dependent value, progressively increasing from 4-6 to 7-10 nm (at 5-18 keV/nm, respectively) while the nanorod length exhibited a broad distribution consistent with that of the unirradiated spherical nanoparticles. The threshold diameter for spherical nanoparticle elongation was comparable to the saturation value of nanorod width. We correlate this saturation value with the diameter of the molten track induced in amorphous SiO2 by SHII. In summary, changes in nanoparticle shape and size are governed to a large extent by the ion irradiation parameters.

KW - Ion irradiation

KW - Metal nanoparticles

KW - Synchrotron radiation

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DO - 10.1016/j.nimb.2009.02.025

M3 - Article

SN - 0168-583X

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SP - 931

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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 - 6

ER -

Changes in metal nanoparticle shape and size induced by swift heavy-ion irradiation

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