The electrical properties of plasma-deposited thin films derived from pelargonium graveolens

Al-Jumaili, Ahmed, Alancherry, Surjith, Bazaka, Kateryna, and Jacob, Mohan V. (2017) The electrical properties of plasma-deposited thin films derived from pelargonium graveolens. Electronics, 6 (4).

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Inherently volatile at atmospheric pressure and room temperature, plant-derived precursors present an interesting human-health-friendly precursor for the chemical vapour deposition of thin films. The electrical properties of films derived from Pelargonium graveolens (geranium) were investigated in metal-insulator-metal (MIM) structures. Thin polymer-like films were deposited using plasma-enhanced synthesis under various plasma input power. The J-V characteristics of thus-fabricated MIM were then studied in order to determine the direct current (DC) conduction mechanism of the plasma polymer layers. It was found that the capacitance of the plasma-deposited films decreases at low frequencies (C approximate to 10^-11) and remains at a relatively constant value (C approximate to 10^-10) at high frequencies. These films also have a low dielectric constant across a wide range of frequencies that decreases as the input RF power increases. The conductivity was determined to be around 10^-16 to 10^-17 Omega^-1 m^-1, which is typical for insulating materials. The Richardson-Schottky mechanism might dominate charge transport in the higher field region for geranium thin films.

Item ID: 52148
Item Type: Article (Research - C1)
ISSN: 2079-9292
Keywords: electrical properties, plasma-deposited films, Pelargonium graveolens, geranium, metal-insulator-metal
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This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (

Funders: Ministry of Higher Education and Scientific Research, Iraq, James Cook University (JCU)
Projects and Grants: JCU Postgraduate Research Scholarship
Date Deposited: 24 Jan 2018 07:33
FoR Codes: 40 ENGINEERING > 4016 Materials engineering > 401609 Polymers and plastics @ 100%
SEO Codes: 86 MANUFACTURING > 8699 Other Manufacturing > 869999 Manufacturing not elsewhere classified @ 100%
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