Nanotech 2003 Vol. 2
Nanotech 2003 Vol. 2
Technical Proceedings of the 2003 Nanotechnology Conference and Trade Show, Volume 2

Molecular Electronics Chapter 2

Theoretical Analysis of Donor - Spacer - Acceptor Structure Molecule for Stable Molecular Rectifier

Authors: H. Mizuseki, K. Niimura, C. Majumder, R.V. Belosludov, A.A. Farajia and Y. Kawazoe

Affilation: Institute for Materials Research, Tohoku University, Japan

Pages: 94 - 97

Keywords: molecular rectifier, molecular electronics, molecular device, nanotechnology, simulation, donor -spacer -acceptor structure

Abstract:
Recently, the field of molecular electronics has attracted strong attention as a post-silicon technology to enable future nanoscale electronic devices. The realization of a molecular device with a unimolecular rectifying function is one of the most important requirements in nanotechnology. In the present study, the geometric and electronic structure of the alkyl derivative molecule C37H50N4O4 has been investigated theoretically using ab initio quantum mechanical calculations. This molecule has a donor -spacer -acceptor structure, and is a leading candidate for the creation of a molecular rectifying device [1]. The electron transport in these molecules has been analyzed, based on spatial distribution of the frontier orbitals. It is seen that while the occupied orbitals are localized on the donor sub-unit, the unoccupied orbitals are localized on the acceptor sub-unit. The localization of the unoccupied orbital state on the acceptor moiety depends on both the excess electron and the acceptor group. Finally, we can examine the effect of a various acceptor and the length of s bridge. [1] T. Mikayama, M. Ara, K. Uehara, A. Sugimoto, K. Mizuno and N. Inoue, Phys. Chem. Chem. Phys. 3 (2001) 3459.

Theoretical Analysis of Donor - Spacer - Acceptor Structure Molecule for Stable Molecular Rectifier

ISBN: 0-9728422-1-7
Pages: 600