Monolayer of nickel(II) complexes coordinated with N,N’-disalicylideneethylenediamine (salen) substituted by dodecyl side chains have been prepared at a water-air interface using the Langmuir-Blodgett method. The monolayer of the complex thus formed is scooped onto the cleaved surface of highly oriented pyrolitic graphite, and imaged by scanning tunneling microscopy.