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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Affiliation: | (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 nmin average core diameter, d,were synthesized by a substitution reaction of octylthiolate-covered nanoparticles with biferrocene-terminatedalkanethiol, 1-(9-thiononyl-1-one)-1 , 1 -biferrocene (BFcS).All sizes of Aun-BFc undergo two-stepoxidation reactions in 0.1 mol dm-3Bu4NClO4-CH2Cl2and consecutive potential scans including the second oxidationprocess lead to the formation of an adhesive redox-active goldnanoparticle film on an electrode. The thickness of theAun-BFc film is controllable by thenumber of potential scans. The scanning tunneling microscopeimages reveal that the Aun-BFc (d = 2.9 nm) film forms many domains ofthe assembled Aun-BFcs, especially theparticles are isotropically assembled in line. |
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Keywords: | 73.22.-f Electronic structure of nanoscalematerials: clusters nanoparticles nanotubes andnanocrystals |
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