Amorphization of Cu nanoparticles: Effects on surface plasmon resonance

H. Amekura; B. Johannessen; D. J. Sprouster; M. C. Ridgway

doi:10.1063/1.3615307

Amorphization of Cu nanoparticles: Effects on surface plasmon resonance

H. Amekura
, B. Johannessen
, D. J. Sprouster
, M. C. Ridgway

Materials Science and Engineering

Stony Brook University

National Institute for Materials Science Tsukuba
Australian Nuclear Science and Technology Organisation
Australian National University

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

14 Scopus citations

Abstract

Crystalline copper nanoparticles (NPs) were formed in silica by multi-energy MeV ion implantations and then transformed to amorphous NPs by irradiation with 5 MeV Sn³⁺ ions. Optical absorption spectra of both the phases were evaluated in the ultra-violet to near-infrared regions. Compared with corresponding crystalline NPs of the same mean diameter, the amorphous NPs showed a low-energy shift of the surface plasmon resonance around 2.2 eV and less prominent absorption structure around 4 eV. These differences are explained by a strongly reduced electron mean-free-path in the amorphous NPs due to the loss of lattice periodicity.

Original language	English
Article number	043102
Journal	Applied Physics Letters
Volume	99
Issue number	4
DOIs	https://doi.org/10.1063/1.3615307
State	Published - Jul 25 2011

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title = "Amorphization of Cu nanoparticles: Effects on surface plasmon resonance",

abstract = "Crystalline copper nanoparticles (NPs) were formed in silica by multi-energy MeV ion implantations and then transformed to amorphous NPs by irradiation with 5 MeV Sn3+ ions. Optical absorption spectra of both the phases were evaluated in the ultra-violet to near-infrared regions. Compared with corresponding crystalline NPs of the same mean diameter, the amorphous NPs showed a low-energy shift of the surface plasmon resonance around 2.2 eV and less prominent absorption structure around 4 eV. These differences are explained by a strongly reduced electron mean-free-path in the amorphous NPs due to the loss of lattice periodicity.",

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T2 - Effects on surface plasmon resonance

AU - Amekura, H.

AU - Johannessen, B.

AU - Sprouster, D. J.

AU - Ridgway, M. C.

PY - 2011/7/25

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N2 - Crystalline copper nanoparticles (NPs) were formed in silica by multi-energy MeV ion implantations and then transformed to amorphous NPs by irradiation with 5 MeV Sn3+ ions. Optical absorption spectra of both the phases were evaluated in the ultra-violet to near-infrared regions. Compared with corresponding crystalline NPs of the same mean diameter, the amorphous NPs showed a low-energy shift of the surface plasmon resonance around 2.2 eV and less prominent absorption structure around 4 eV. These differences are explained by a strongly reduced electron mean-free-path in the amorphous NPs due to the loss of lattice periodicity.

AB - Crystalline copper nanoparticles (NPs) were formed in silica by multi-energy MeV ion implantations and then transformed to amorphous NPs by irradiation with 5 MeV Sn3+ ions. Optical absorption spectra of both the phases were evaluated in the ultra-violet to near-infrared regions. Compared with corresponding crystalline NPs of the same mean diameter, the amorphous NPs showed a low-energy shift of the surface plasmon resonance around 2.2 eV and less prominent absorption structure around 4 eV. These differences are explained by a strongly reduced electron mean-free-path in the amorphous NPs due to the loss of lattice periodicity.

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DO - 10.1063/1.3615307

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JO - Applied Physics Letters

JF - Applied Physics Letters

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Amorphization of Cu nanoparticles: Effects on surface plasmon resonance

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