PREPARATION OF POLYMERIC METAL-TETRACYANOQUINODIMETHANE FILM AND ITS BISTABLE SWITCHING

Metal salts of charge transfer complex such as CuTCNQ, LiTCNQ and others have been found to dissolve in water when mixed with polyethyleneimine (PEI). From electronic spectra it was supposed that metal salts of organic complex form trilateral complex with PEI in water. Homogeneous and continuous polymeric thin film was prepared by casting this solution. The film with a thickness of 150-200 nm showed field-induced bistable switching from low to high impedance regime at a field strength of 4 x 10(4) V/mm. A possible switching mechanism was briefly discussed.