Molecular rectifier based on [4-[(N-(2-thiolethyl),N′-methyl)amino]phenyl]tricyanoethene(TAPE)

[4-[(N-(2-thiolethyl),N′-methyl)amino]phenyl]tricyanoethene(TAPE),a kind of conjugated organic molecule with sulfhydryl group,was synthesized.Molecular rectifier Au/ TAPE /Au(nanoparticle) was prepared by self-assembled monolayer(SAM) method.The current-voltage(I-V) character was measured by scanning tunneling microscopy(STM),a maximum rectification ratio of 22.7 was obtained at the bias voltage of ±0.95V.The electrical property of the monolayer,fore-and-aft top electrode's preparation process,was studied.The organic monolayer was characterized by grazing incidence FTIR.