Determination of the optical properties of ion beam modified polymers

Jolly, Adam L. (2019) Determination of the optical properties of ion beam modified polymers. Honours thesis, University of Southern Queensland. (Unpublished)

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Abstract

Polyetheretherketone samples were irradiated with 50 kV N+, 10 kV Sn+;++ and 45 kV Sn+;++ ions at various doses ranging from 1 x 10^14 to 1 x 10^17 ions/cm^2. Modification of the optical properties of the polymer samples were investigated using Ultraviolet-Visible-Near Infra-red spectroscopy. Analysis of the optical spectroscopy suggested an increase in reflection and absorption of the samples after ion implantation. An equation that determines a wave-
length dependant optical absorption coefficient was then developed using theoretical modelling methods. This optical absorption coefficient equation was then applied to the optical spectroscopy measurements. The equation was compared to existing modelled absorption coefficient equations of ion
implanted polymers. The proposed model calculated an absorption coefficient over the highly absorptive modified region of the sample as opposed to most existing models that calculate this over the entire sample. A significant increase in the absorption coefficient of the proposed model was observed compared to existing models. All calculated absorption coefficients were then used to produce Tauc plots that estimate the optical band gap of these modified materials. Significant differences in optical band gap were also observed between the proposed model and existing models. These results and conclusions are discussed along with recommendations on which future research should be taken to validate the results.


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Item Type: Thesis (Non-Research) (Honours)
Item Status: Live Archive
Additional Information: Bachelor of Science (Honours) thesis.
Faculty/School / Institute/Centre: Historic - Faculty of Health, Engineering and Sciences - School of Sciences (6 Sep 2019 - 31 Dec 2021)
Faculty/School / Institute/Centre: Historic - Faculty of Health, Engineering and Sciences - School of Sciences (6 Sep 2019 - 31 Dec 2021)
Supervisors: Tavenner, Eric; Carter, Brad
Date Deposited: 08 Dec 2021 01:39
Last Modified: 31 Dec 2021 22:05
Uncontrolled Keywords: ion beam modified polymers
Fields of Research (2008): 02 Physical Sciences > 0205 Optical Physics > 020503 Nonlinear Optics and Spectroscopy
02 Physical Sciences > 0206 Quantum Physics > 020604 Quantum Optics
Fields of Research (2020): 51 PHYSICAL SCIENCES > 5108 Quantum physics > 510804 Quantum optics and quantum optomechanics
51 PHYSICAL SCIENCES > 5102 Atomic, molecular and optical physics > 510203 Nonlinear optics and spectroscopy
Socio-Economic Objectives (2008): E Expanding Knowledge > 97 Expanding Knowledge > 970102 Expanding Knowledge in the Physical Sciences
Socio-Economic Objectives (2020): 28 EXPANDING KNOWLEDGE > 2801 Expanding knowledge > 280120 Expanding knowledge in the physical sciences
URI: http://eprints.usq.edu.au/id/eprint/45474

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