Construction of a two-dimensional molecule-nanoparticle network using iron(II) bis(terpyridine) complex formation for molecular-device applications
✍ Scribed by Hobara, D. ;Kondo, S. ;Choi, M.-S. ;Ishioka, Y. ;Hirata, S. ;Murata, M. ;Azuma, K. ;Kasahara, J.
- Publisher
- John Wiley and Sons
- Year
- 2007
- Tongue
- English
- Weight
- 277 KB
- Volume
- 204
- Category
- Article
- ISSN
- 0031-8965
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✦ Synopsis
Abstract
We report a novel method to construct a two‐dimensional network of gold nanoparticles and metal complex molecules. Terpyridine derivatives having a thiol group are adsorbed on a gold nanoparticle surface through formation of a gold–sulfur bond. A monolayer of nanoparticles is then formed on the water surface, then transferred onto a Si/SiO~2~ substrate. The introduction of Fe^2+^ from a Fe(BF~4~)~2~ solution forms an iron(II) bis(terpyridine) complex, which simultaneously forms a network where the complex molecules interlink adjacent nanoparticles. The conductivity of the network, formed by the conjugated terpyridine derivative, is 4 or 5 orders of magnitude higher than that of non‐conjugated derivatives. Conductivity is modulated by gate voltage when a conjugated derivative is used but not when a non‐conjugated derivative is used. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)