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Article

An Evaluation of Optical Absorbance Kinetics for the Detection of Micro-Porosity in Molecularly Doped Polymer Thin-Films

School of Science and Engineering, University of Dundee, Dundee DD1 4HN, UK
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Author to whom correspondence should be addressed.
Academic Editor: Antonio Polimeni
Solids 2021, 2(2), 155-164; https://doi.org/10.3390/solids2020010
Received: 1 February 2021 / Revised: 24 March 2021 / Accepted: 29 March 2021 / Published: 1 April 2021
(This article belongs to the Special Issue Feature Papers of Solids 2021)
The use of optical absorbance kinetics to identify micro-porous regions in doped polymer films is evaluated. Data are presented for a series of hydrazone doped polymer films which are found to optically bleach upon exposure to an ultra violet (UV) radiation source. The UV absorbance kinetics are found to exhibit distinctive characteristics for the various polymers studied, with changes in film absorbance occurring either in a fast (<103 s) or slow (>104 s) timescale. An interpretation of these distinctive timescales based upon a cellular-automata model of the absorbance kinetics suggests that the underlying photo-oxidation of the hydrazone is highly sensitive to underlying micro-porosity in the films which controls the necessary supply of absorbed oxygen for photo-cyclic reaction. View Full-Text
Keywords: molecularly doped polymer; optical absorbance kinetics; micro-porosity molecularly doped polymer; optical absorbance kinetics; micro-porosity
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MDPI and ACS Style

Goldie, D.M.; Skelton, O.; Bailey, T.J. An Evaluation of Optical Absorbance Kinetics for the Detection of Micro-Porosity in Molecularly Doped Polymer Thin-Films. Solids 2021, 2, 155-164. https://doi.org/10.3390/solids2020010

AMA Style

Goldie DM, Skelton O, Bailey TJ. An Evaluation of Optical Absorbance Kinetics for the Detection of Micro-Porosity in Molecularly Doped Polymer Thin-Films. Solids. 2021; 2(2):155-164. https://doi.org/10.3390/solids2020010

Chicago/Turabian Style

Goldie, David M., Orlaith Skelton, and Thomas J. Bailey. 2021. "An Evaluation of Optical Absorbance Kinetics for the Detection of Micro-Porosity in Molecularly Doped Polymer Thin-Films" Solids 2, no. 2: 155-164. https://doi.org/10.3390/solids2020010

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