Core size effects on electrodeposition of gold nanoparticles attached with biferrocene derivatives |
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Authors: | M Yamada and H Nishihara |
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Institution: | (1) Department of Chemistry, School of Science, The University of Tokyo, Tokyo 113-0033, Japan |
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Abstract: | Biferrocene-modified gold nanoparticles
(Aun-BFc) comprising 1.7, 2.2 and 2.9 nm
in average core diameter, d,
were synthesized by a substitution reaction of octyl
thiolate-covered nanoparticles with biferrocene-terminated
alkanethiol, 1-(9-thiononyl-1-one)-1, 1-biferrocene (BFcS).
All sizes of Aun-BFc undergo two-step
oxidation reactions in 0.1 mol dm-3
Bu4NClO4-CH2Cl2
and consecutive potential scans including the second oxidation
process lead to the formation of an adhesive redox-active gold
nanoparticle film on an electrode. The thickness of the
Aun-BFc film is controllable by the
number of potential scans. The scanning tunneling microscope
images reveal that the Aun-BFc (d = 2.9 nm) film forms many domains of
the assembled Aun-BFcs, especially the
particles are isotropically assembled in line. |
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Keywords: | 73 22 -f Electronic structure of nanoscale
materials: clusters nanoparticles nanotubes and
nanocrystals |
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