Co-Au core-shell nanocrystals formed by sequential ion implantation into SiO2

P. Kluth; B. Hoy; B. Johannessen; S. G. Dunn; G. J. Foran; M. C. Ridgway

doi:10.1063/1.2360891

Co-Au core-shell nanocrystals formed by sequential ion implantation into SiO₂

P. Kluth^*, B. Hoy, B. Johannessen, S. G. Dunn, G. J. Foran, M. C. Ridgway

^*Corresponding author for this work

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

16 Citations (Scopus)

Abstract

Co-Au core-shell nanocrystals (NCs) were formed by sequential ion implantation of Au and Co into thin Si O2. The NCs were investigated by means of transmission electron microscopy and extended x-ray absorption fine structure spectroscopy. The latter reveals a bond length expansion in the Co core compared to monatomic Co NCs. Concomitantly, a significant contraction of the bond length and a significant reduction of the effective Au-Au coordination number were observed in the Au shells. Increased Debye-Waller factors indicate significant strain in the NCs. These experimental results verify recent theoretical predictions.

Original language	English
Article number	153118
Journal	Applied Physics Letters
Volume	89
Issue number	15
DOIs	https://doi.org/10.1063/1.2360891
Publication status	Published - 2006

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abstract = "Co-Au core-shell nanocrystals (NCs) were formed by sequential ion implantation of Au and Co into thin Si O2. The NCs were investigated by means of transmission electron microscopy and extended x-ray absorption fine structure spectroscopy. The latter reveals a bond length expansion in the Co core compared to monatomic Co NCs. Concomitantly, a significant contraction of the bond length and a significant reduction of the effective Au-Au coordination number were observed in the Au shells. Increased Debye-Waller factors indicate significant strain in the NCs. These experimental results verify recent theoretical predictions.",

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AU - Kluth, P.

AU - Hoy, B.

AU - Johannessen, B.

AU - Dunn, S. G.

AU - Foran, G. J.

AU - Ridgway, M. C.

PY - 2006

Y1 - 2006

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AB - Co-Au core-shell nanocrystals (NCs) were formed by sequential ion implantation of Au and Co into thin Si O2. The NCs were investigated by means of transmission electron microscopy and extended x-ray absorption fine structure spectroscopy. The latter reveals a bond length expansion in the Co core compared to monatomic Co NCs. Concomitantly, a significant contraction of the bond length and a significant reduction of the effective Au-Au coordination number were observed in the Au shells. Increased Debye-Waller factors indicate significant strain in the NCs. These experimental results verify recent theoretical predictions.

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JO - Applied Physics Letters

JF - Applied Physics Letters

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M1 - 153118

ER -

Co-Au core-shell nanocrystals formed by sequential ion implantation into SiO₂

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