Close

A note on cookies

We use cookies to improve your experience of our website. Privacy Policy

Queen Mary University of LondonQueen Mary University of London
Research menu

School of Engineering and Materials Science
Research Student Awards

PhD Thesis: Processing and characterization of aligned ferroelectric PVDF-TrFE thin films

Author: MOHD DAHAN, Rozana

Year: 2009

Supervisor(s): Mike Reece

The main interest in this research was to investigate the ferroelectric properties of unaligned and aligned PVDF-TrFE thin films (72-28, 65-35 and 51-49 mol %). The films were fabricated by spin coating on glass substrates with and without aligned PTFE films. The PVDF-TrFE films were aligned on the PTFE films as characterized qualitatively by birefringence in Polarized Light Microscopy. The alignment of PVDF-TrFE/PTFE films was enhanced by annealing at temperatures predetermined by Differential Scanning Calorimetry (DSC).

The ferroelectric properties of the 72-28 PVDF-TrFE/PTFE films on gold coated glass substrates were studied by Polarization-Electric Field (P-E) loop measurements. A layer of octadecyitriclosilane (OTS) or tetracosane (TC) was deposited between the PTFE and 72-28 PVDF-TrFE layers in order to increase the electrical strength of the films. The effect of OTS and TC on the polarization-field reversal loops for the PVDF-TrFE films, with and without PTFE was studied.