Abstract
Tetracyanoquinodimethane (TCNQ) Langmuir-Blodgett (LB) films with and without adsorbed electronic donors of p-phenylenediamine (PD) and N, N, N', N'-tetramethyl-p-phenylenediamine (TMPD) were prepared. The structures of the LB films were investigated by attenuated total reflection (ATR) method using a visible laser. The thickness of the non-adsorbed TCNQ LB film obtained from the ATR results was larger than the molecular length of TCNQ. This is thought to be caused by the formation of the bi-monolayers. In contrast, the adsorbed TCNQ LB films had monolayer structures by adsorbing donors. The atomic force microscope (AFM) images showed that non-adsorbed TCNQ LB film had a rough and terraced surface. This is considered to be due to the formation of microcrystal-like domains which were not observed in the adsorbed TCNQ LB films.
