Topographical evolution of multilayer PVDF thin films deposited using Langmuir-Blodgett technique Available to Purchase

Polyvinylidene Fluoride (PVDF) is a promising homopolymer for a wide range of thin film applications due to the pyroelectric, ferroelectric and piezoelectric properties of its β-phase crystal structure. In the present work, the thin films of PVDF are prepared by Langmuir-Blodgett (LB) technique which allows for unique control of the film fabrication parameters. The Langmuir monolayers before the LB deposition are prepared by using N-methyl-2-pyrrolidone (NMP, a dipolar aprotic solvent) as the spreading solvent. The isotherm, hysteresis and barrier oscillation experiments for the PVDF Langmuir monolayers show that the most stable PVDF films were obtained for a spreading solution molarity of 0.0936 mol/l and 20 mm/min compression rate. Multilayer PVDF Langmuir Blodgett thin filmsare deposited on glass substrate with good transfer ratio. The topographical evolution of the films with successive layer deposition is characterized using AFM.