Hybrid SAM/LB device structures: manipulation of the molecular orientation for nanoscale electronic applications

Abstract

Asymmetric current–voltage characteristics have resulted from hybrid SAM/LB structures of squaraine dyes in which the donor-acceptor-donor (D-A-D) molecules are aligned vertically in the self-assembled monolayer and horizontally in the Langmuir–Blodgett film: the separate layers exhibit symmetrical I–V characteristics and the altered behaviour of the hybrid bilayer is attributed to orientation-induced molecular rectification.