Comparative study of the monolayers of CH3-(CH2)n-SiCl3 and CH3-(CH2)n-PO(OH)2, n = 4 and 13, adsorbed on polycrystalline titanium substrates

The purpose of this contribution is to compare the quality of adsorbed films of CH3-(CH2)n-SiCl3 and CH3-(CH2)n-PO(OH)2, n = 4 and 13. Mechanically polished polycrystalline titanium substrates were reacted with 10-3 M solutions of the compounds in ethanol for the n-alkanephosphonic acids and in toluene for the n-alkyltrichlorosilanes. Assessments of the films have been carried out with X-ray photoelectron spectroscopy, contact angle measurements and electrochemical impedance spectroscopy. n-alkyltrichlorosilanes form better quality monolayers than n-alkanephosphonic acids.