Optical photothermal infrared response (O-PTIR) of functionalized thiophene monomers and polymers

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2025-08-06

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MRS Communications

Abstract

Optical photothermal infrared response (O-PTIR) spectroscopy is an emerging technique of particular interest for examining the local chemistry and structure of organic molecular and polymer materials. Here, we used O-PTIR to examine the 3,4-ethylenedioxythiophene (EDOT) and maleimide-functionalized (EDOT-MA) monomers, and also thin films (~100 nm) of their corresponding polymers (PEDOT and PEDOT-MA) electrochemically deposited on interdigitated (5 μm) gold electrodes. The O-PTIR technique provided high-resolution (~ 1 μm) information about the chemical structure, including the ability to map local variations in the composition of the MA side groups. Certain limitations were found, particularly in samples that were strongly optically absorbing.

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Keywords

Infrared Spectroscopy, Organic Molecules in Materials Science, Optical Spectroscopy, Polymers, Surface plasmon resonance, Surface-Enhanced Raman Spectroscopy

Citation

Baugh, Q., Lee, J., Wu, Y. et al. Optical photothermal infrared response (O-PTIR) of functionalized thiophene monomers and polymers. MRS Commun. (2025). https://doi.org/10.1557/s43579-025-00783-0

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https://udspace.udel.edu/handle/19716/36482

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Attribution 4.0 International
Except where otherwised noted, this item's license is described as Attribution 4.0 International