Co–Au core-shell nanocrystals formed by sequential ion implantation into SiO2
Co–Au core-shell nanocrystals (NCs) were formed by sequential ion implantation of Au and Co into thin SiO2. 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 comp...
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| Veröffentlicht in: | Applied physics letters 2006-10, Vol.89 (15) |
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| container_issue | 15 |
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| container_title | Applied physics letters |
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| creator | Kluth, P. Hoy, B. Johannessen, B. Dunn, S. G. Foran, G. J. Ridgway, M. C. |
| description | Co–Au core-shell nanocrystals (NCs) were formed by sequential ion implantation of Au and Co into thin SiO2. 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. |
| doi_str_mv | 10.1063/1.2360891 |
| format | Article |
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G.</creatorcontrib><creatorcontrib>Foran, G. J.</creatorcontrib><creatorcontrib>Ridgway, M. C.</creatorcontrib><title>Co–Au core-shell nanocrystals formed by sequential ion implantation into SiO2</title><title>Applied physics letters</title><description>Co–Au core-shell nanocrystals (NCs) were formed by sequential ion implantation of Au and Co into thin SiO2. 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. 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C.</creatorcontrib><collection>CrossRef</collection><jtitle>Applied physics letters</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Kluth, P.</au><au>Hoy, B.</au><au>Johannessen, B.</au><au>Dunn, S. G.</au><au>Foran, G. J.</au><au>Ridgway, M. C.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Co–Au core-shell nanocrystals formed by sequential ion implantation into SiO2</atitle><jtitle>Applied physics letters</jtitle><date>2006-10-09</date><risdate>2006</risdate><volume>89</volume><issue>15</issue><issn>0003-6951</issn><eissn>1077-3118</eissn><abstract>Co–Au core-shell nanocrystals (NCs) were formed by sequential ion implantation of Au and Co into thin SiO2. 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.</abstract><doi>10.1063/1.2360891</doi><oa>free_for_read</oa></addata></record> |
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| identifier | ISSN: 0003-6951 |
| ispartof | Applied physics letters, 2006-10, Vol.89 (15) |
| issn | 0003-6951 1077-3118 |
| language | eng |
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| source | AIP Journals Complete; AIP Digital Archive |
| title | Co–Au core-shell nanocrystals formed by sequential ion implantation into SiO2 |
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