Conformation in Ultrathin Polymer Brush Coatings Resolved by Infrared Nanoscopy.

Analytical Chemistry
Andres de Los Santos PereiraOgnen Pop-Georgievski

Abstract

Polymer brush coatings are effective in preventing blood coagulation or bacterial attachment, but their chain conformation, while vital for this effect, was never characterized in high spatial resolution. Here, we report mid-infrared spectroscopic nanoscopy studies of few-nanometer-thin poly(ethylene oxide) (PEO) films which reveal marked spectral variations along the surface at a length scale smaller than 100 nm and originating only from the physical conformation of the chains. The conformation and average orientation of the polymer chains in the layer is extracted from the spectra with the aid of theoretic modeling, confirming the spontaneous formation of a crystalline phase. This result suggests spectroscopic nanoscopy as a powerful new tool to characterize polymer brush coatings.

References

Jul 28, 2004·Langmuir : the ACS Journal of Surfaces and Colloids·Bogdan ZdyrkoIgor Luzinov
Jun 24, 2008·Analytical Chemistry·Alfredo J IbáñezAles Svatos
Jun 19, 2012·Nano Letters·Florian HuthRainer Hillenbrand
Feb 7, 2013·International Journal of Molecular Sciences·Hans-Georg Braun, Evelyn Meyer
Dec 5, 2013·Nature Communications·Iban AmenabarRainer Hillenbrand

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Citations

Jan 13, 2021·Analytical Chemistry·H Surangi N JayawardenaMingdi Yan

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