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https://hdl.handle.net/10119/15287
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| Title: | Structure of Gold-Silver Nanoparticles |
| Authors: | Godfrey, Ian J
Dent, Andrew J,
Parkin, Ivan P.
Maenosono, Shinya
Gopinathan, Sankar |
| Keywords: | Nanoparticle
Core-shell
Heterostructure
EXAFS |
| Issue Date: | 2017-01-04 |
| Publisher: | American Chemical Society |
| Magazine name: | Journal of Physical Chemistry C |
| Volume: | 121 |
| Number: | 3 |
| Start page: | 1957 |
| End page: | 1963 |
| DOI: | 10.1021/acs.jpcc.6b11186 |
| Abstract: | Nanoparticles with nominal structures of Au@Ag (core@shell) and Au@Ag@Au (core@shell@shell) were prepared using the sequential citrate reduction technique and characterized using routine characterization techniques, including transmission electron microscopy. X-ray absorption spectroscopy was then carried out on the samples, and extended X-ray absorption fine structure (EXAFS) analysis was used to determine the structure of the systems. The results of the routine techniques and the X-ray absorption spectroscopy were then compared. EXAFS analysis of the nanoparticles with the Au@Ag structure revealed very limited bimetallic interactions, supporting the assignment of a core@shell structure. EXAFS analysis of the nanoparticles with Au@Ag@Au structure showed an increased proportion of bimetallic interactions. Based on the colloid composition, the other characterization techniques and the chemistry of the system, these nanoparticles were interpreted as having an Au@Au/Ag-alloy structure. The EXAFS analyses corroborated the other characterization techniques and enabled the determination of the average-structure of the entire sample. |
| Rights: | Ian J. Godfrey, Andrew J. Dent, Ivan P. Parkin, Shinya Maenosono, and Gopinathan Sankar, Journal of Physical Chemistry C, 2017, 121(3), pp.1957-1963. This is an open access article published under a Creative Commons Attribution (CC-BY) License, which permits unrestricted use, distribution and reproduction in any medium, provided the author and source are cited. |
| URI: | https://hdl.handle.net/10119/15287 |
| Material Type: | publisher |
| Appears in Collections: | c10-1. 雑誌掲載論文 (Journal Articles)
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