Communication: Polycrystalline zeolite films-of great importance in ca
talysis, separation, and sensing-can be grown on various substrates, b
ut in most cases there are problems in detaching the films. It is show
n that a mercury surface accelerates the nucleation and crystallizatio
n of MFI-type zeolites and that the surface of the film against the me
rcury (left in Figure) is smoother than that on the solution side (rig
ht in Figure).