| Numéro |
J. Phys. IV France
Volume 114, April 2004
|
|
|---|---|---|
| Page(s) | 667 - 671 | |
| DOI | https://doi.org/10.1051/jp4:2004114160 | |
J. Phys. IV France 114 (2004) 667
DOI: 10.1051/jp4:2004114160
Development of TTF-based self-assembled monolayer systems and their electronic properties
T. Enoki1, 1, Y. Yokota1, R. Yuge1, W. Tu1, A. Miyazaki1, K. Takai1 and K. Fukui11 Department of Chemistry, Tokyo Institute of Technology, Ookayama, Meguro-ku, Tokyo 152-8551, Japan
Abstract
Self-assembled monolayer (SAM) systems of alkanethiol and
TTF-substituted alkanethiol molecules on Au substrate and metal
nanoparticles are investigated. TTF-substituted alkanethiol molecules form
charge transfer complex SAM with TCNQ molecules, where charge transfer (CT)
rate becomes similar to that in bulk TTF
TCNQ crystal. TTF-substituted
alkanethiol SAMs with long alkyl chains shows Coulomb-blockade-type electron
transport owing to the resistance of the long alkyl chain bridge. In Pt
nanoparticles with alkanethiol SAMs on their surface, CT takes place from
core Pt nanoparticle to surface SAMs, producing an electron deficient state
in Pt core nanoparticle. Pd nanoparticles with SAMs of mixtures of
alkanethiol and TTF-substituted alkanethiol molecules take a large reduction
of the Pauli paramagnetic susceptibility, which is brought about by CT.
Key words. Nanoparticle - self-assembled monolayer - interface -
quantum size effect - TTF donor - charge transfer.
© EDP Sciences 2004