Fabrication of Nanorattles with Passive Shell
Resource
The Journal of Physical Chemistry B 110 (39): 19162-19167
Journal
The Journal of Physical Chemistry B
Journal Volume
110
Journal Issue
39
Pages
19162-19167
Date Issued
2006
Date
2006
Author(s)
Abstract
This investigation describes the formation of a metal nanorattle with a pure metal shell by varying experimental parameters. The galvanic replacement reaction between silver and chloroauric acid was adopted to prepare hollow metal nanoparticles. This approach is extended to produce nanorattles of Au cores and Au shells by starting with Au(core)Ag(shell) nanoparticles as templates. The effect of temperature on the nanostructure of the final product is also considered. The composition of the shell in nanorattles can be controlled by varying the reaction temperature (to form pure gold or gold-silver alloy, for example). X-ray absorption fine structure spectroscopy is conducted to elucidate the fine structure of these nanoparticles. Partial alloying between the Au core and the Ag shell is observed by extended X-ray absorption fine structure (EXAFS).
Type
journal article
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