2001 Volume 58 Issue 9 Pages 435-441
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. The metal substrates were baked and unbaked under ultra high vacuum condition to remove adsorbed water. Adsorption and desorption probability of DB molecules, and molecular structures of DB films on stainless steel and Fe substrates were investigated by ellipsometry, XPS and AFM. The results showed that the adsorption probability of DB molecules on a baked substrate was smaller 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 suggested that adsorbed water on the substrates caused polymerization in the DB films. The adsorption probability of DB molecules on the stainless steel substrate was small and the desorption of DB did not occur easily compared with the Fe substrate. It is assumed that DB was difficult to be polymerized on the stainless steel substrate.
