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The coating experiment was done by reduction of HAuCl4 in an
ethanol solution [2]. Approximately 4 mg magnetite nanoparticles
suspended in ethanol (1 ml) with 2 ml of HAuCl4 aqueous solution.
Schematic reaction is shown in Fig. 1a. The sample was stirred in
a sonication bath from time to time for 2 h at room temperature.
The resulting mixture turned dark red during sonication. After that
time solution was allowed to stand unmixed form about 15 min,
then the prepared magnetite¨Cgold nanocomposites were separated
from the colloid by a permanent magnet. Resulting nanoparticles
were washed three times with distilled water for use in further
experiments.
B. Kalska-Szostko et al. / Applied Surface Science 258 (2012) 2783¨C 2787
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Hindawi Publishing Corporation
Journal of Nanomaterials
Volume 2009, Article ID 962021, 5 pages
doi:10.1155/2009/962021
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