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Measuring Tg in Ultra-Thin Polymer Films With an Excimer Fluorescence Technique

Published

Author(s)

Christopher C. White, Kalman D. Migler, Wen-Li Wu

Abstract

An excimer fluorescence technique has been applied to the measurement of Tg of ultra-thin polystyrene films. This technique utilizes an excimer-forming molecule with fluorescent emission in two wavelength bands. The intensity ratio of these bands is a sensitive measure of local viscosity. This technique has been applied to five polystyrene films in the thickness range of 25 nm to 200 nm supported on quartz substrates. The observed Tg for the five ultra-thin polymer films was similar to the bulk Tg with no observed dependence on thickness. Additionally, the Tg determined for each film did not show any dependence on thermal history.
Citation
Polymer Engineering and Science
Volume
41
Issue
No. 9

Keywords

fluorescence probe, T<sub>g</sub>, Tg, ultra-thin polymer film

Citation

White, C. , Migler, K. and Wu, W. (2001), Measuring T<sub>g</sub> in Ultra-Thin Polymer Films With an Excimer Fluorescence Technique, Polymer Engineering and Science, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=851574 (Accessed May 19, 2024)

Issues

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Created August 31, 2001, Updated October 12, 2021