A photochemical approach to directing flow and stabilizing topography in polymer films

Joshua M. Katzenstein; Chae Bin Kim; Nathan A. Prisco; Reika Katsumata; Zhenpeng Li; Dustin W. Janes; Gregory Blachut; Christopher J. Ellison

doi:10.1021/ma5010698

A photochemical approach to directing flow and stabilizing topography in polymer films

Joshua M. Katzenstein, Chae Bin Kim, Nathan A. Prisco, Reika Katsumata, Zhenpeng Li, Dustin W. Janes, Gregory Blachut, Christopher J. Ellison

Research output: Contribution to journal › Article › peer-review

18 Scopus citations

Abstract

Coatings and substrates with topographically patterned features will play an important role in efficient technologies for harvesting and transmitting light energy. In order to address these applications, a methodology for prescribing height profiles in polymer films is presented here. This is accomplished by photochemcially patterning a solid-state, sensitized polymer film. After heating the film above its glass transition temperature, melt-state flow is triggered and directed by the chemical pattern. A second light exposure was applied to fully activate a heat-stable photo-crosslinking additive. The features formed here are thermochemically stable and can act as an underlayer in a multilayered film. To exemplify this capability, these films were also used to direct the macroscopic film morphology of a block copolymer overlayer.

Original language	English (US)
Pages (from-to)	6804-6812
Number of pages	9
Journal	Macromolecules
Volume	47
Issue number	19
DOIs	https://doi.org/10.1021/ma5010698
State	Published - Oct 14 2014
Externally published	Yes

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Publisher Copyright:
© 2014 American Chemical Society.

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AU - Katzenstein, Joshua M.

AU - Kim, Chae Bin

AU - Prisco, Nathan A.

AU - Katsumata, Reika

AU - Li, Zhenpeng

AU - Janes, Dustin W.

AU - Blachut, Gregory

AU - Ellison, Christopher J.

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AB - Coatings and substrates with topographically patterned features will play an important role in efficient technologies for harvesting and transmitting light energy. In order to address these applications, a methodology for prescribing height profiles in polymer films is presented here. This is accomplished by photochemcially patterning a solid-state, sensitized polymer film. After heating the film above its glass transition temperature, melt-state flow is triggered and directed by the chemical pattern. A second light exposure was applied to fully activate a heat-stable photo-crosslinking additive. The features formed here are thermochemically stable and can act as an underlayer in a multilayered film. To exemplify this capability, these films were also used to direct the macroscopic film morphology of a block copolymer overlayer.

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A photochemical approach to directing flow and stabilizing topography in polymer films

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