Record link: 
http://hdl.handle.net/20.500.12708/136638
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Title: 
Optical constants of organic insulators in the UV range extracted from reflection electron energy loss spectra
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Citation: 
Yuryevna Ridzel, O., Kalbe, H., Astašauskas, V., Kuksa, P., Bellissimo, A., & Werner, W. S. M. (2022). Optical constants of organic insulators in the UV range extracted from reflection electron energy loss spectra. Surface and Interface Analysis, 54(5), 487–500. https://doi.org/10.1002/sia.7055
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Publisher DOI: 
10.1002/sia.7055
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Publication Type: 
Article - Original Research Article
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Language: 
English
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Authors: 
Yuryevna Ridzel, Olga 
Kalbe, Henryk 
Astašauskas, Vytautas 
Kuksa, Pavel 
Bellissimo, Alessandra 
Werner, Wolfgang S. M. 
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Organisational Unit: 
E134-01 - Forschungsbereich Applied and Computational Physics 
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Journal: 
Surface and Interface Analysis 
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ISSN: 
0142-2421
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Date (published): 
2022
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Number of Pages: 
14
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Publisher: 
WILEY
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Peer reviewed: 
Yes
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Keywords: 
Condensed Matter Physics; General Chemistry; Surfaces, Coatings and Films; Materials Chemistry; electron inelastic mean free path; insulators; optical constants; organic polymers; reflection electron energy loss spectroscopy; Surfaces and Interfaces
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Abstract: 
Reflection electron energy loss spectroscopy (REELS) spectra were measured for seven insulating organic compounds (DNA, Irganox 1010, Kapton, polyethylene [PE], poly(methyl methacrylate) [PMMA], polystyrene [PS] and polytetrafluoroethylene [PTFE]). Optical constants and energy band gaps were extracted from the measured REELS spectra after elimination of multiple electron scattering via a deconvolution and fitting the normalised single scattering energy loss spectra to Drude and Drude-Lindhard model dielectric functions, constrained by the Kramers-Kronig sum and f-sum rules. Satisfactory agreement is found for those optical constants for which literature data exists. For PTFE, the observed features in the optical data correspond to its electronic structure.
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Research Areas: 
Materials Characterization: 100%
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Science Branch: 
Physik, Astronomie
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