INFLUENCE OF THE SUBSTRATE ON THE CRYSTALLINE PHASE AND MORPHOLOGY OF POLY (VINYLIDENE FLUORIDE) (PVDF) THIN FILM

Ibtisam Yahya Abdullah, Muhammad Yahaya (), Mohammad Hafizuddin Hj Jumali () and Haider Mohammed Shanshool
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Ibtisam Yahya Abdullah: School of Applied Physics, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor, Malaysia†Department of Physics, College of Science, University of Mosul, Iraq
Muhammad Yahaya: School of Applied Physics, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor, Malaysia
Mohammad Hafizuddin Hj Jumali: School of Applied Physics, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor, Malaysia
Haider Mohammed Shanshool: School of Applied Physics, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor, Malaysia‡Ministry of Science and Technology, Baghdad, Iraq

Surface Review and Letters (SRL), 2016, vol. 23, issue 03, 1-8

Abstract: The effect of substrate on the crystalline phase and morphology of the poly (vinylidene fluoride) (PVDF) thin film has been investigated. The solution of PVDF/Hexamethyl phosphoramide (HMPA) was deposited on four different substrates, namely, silicon (Si), glass (SiO2), indium tin oxide (ITO) coated glass and silver (Ag) coated glass respectively by using the spin coating technique. The crystalline structure was investigated using X-ray diffraction (XRD) and Fourier transform infrared (FTIR) techniques. The morphology was determined using scanning electron microscopy (SEM). XRD demonstrated that the structure of PVDF thin films on each substrate is β-phase with different orientations of the molecular chains. FTIR results confirmed XRD that the samples contain β-phase. SEM shows spherulites structure, which is rough and porous, besides, the size of spherulites and the porosity are different for each sample. The size of spherulites is in average diameter range (1–6μm) and this range is attributed to the β-phase. The nucleation process of β-phase on the various substrates attributed either to the match of polymer-substrate or to the electrostatic interaction. Among the substrates used, the ITO substrate exhibited a greater tendency for β-phase formation.

Keywords: Substrate; morphology; spin coating; PVDF; thin film; piezoelectricity (search for similar items in EconPapers)
Date: 2016
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DOI: 10.1142/S0218625X16500050

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