SELF-ASSEMBLED PROCESS FOR THE PREPARATION OF ULTRA-THIN ZEOLITE FILMS

A. simple and effective process of preparing ultra-thin zeolite films on a silicon substrate is described. The starting material was a stabl e colloidal dispersion of TS-I zeolite particles with a size of 50 -10 0 nm. The silicon wafer is placed in a 20 mM solution of hexanoic acid in water at pH = 3. When the colloidal dispersion is added, the adsor ption of the hexanoic acid molecules onto the zeolite particles causes them to deposit on the silicon wafer to form a thin layer with a thic kness of about 103 nm.