The adsorption of 6-dibutylamino-1,3,5-triazine-2,4-dithiol on stainless steel by the conventional vacuum deposition

Films of 6-dibutylamino-1,3,5-triazine-2,4-dithiol (DB) were formed on the stainless steel substrates by the conventional vacuum deposition method. Th e metal substrates were baked and unbaked under ultra high vacuum condition to remove adsorbed water. Adsorption and desorption probability of DB mole cules, and molecular structures of DB films on stainless steel and Fe subst rates were investigated by ellipsometry, XPS and AFM. The results showed th at the adsorption probability of DB molecules on a baked substrate was smal ler than that on an unbaked substrate. The desorption of DB molecules from the baked substrate did not occur easily. XPS data showed that DB molecules easily formed disulfide bonds on the unbaked substrate surface. It is sugg ested that adsorbed water on the substrates caused polymerization in the DB films. The adsorption probability of DB molecules on the stainless steel s ubstrate was small and the desorption of DB did not occur easily compared w ith the Fe substrate. It is assumed that DB was difficult to be polymerized on the stainless steel substrate.