Optimizing photo-embossed gratings: a gradient library approach

Journal of Combinatorial Chemistry
Berend-Jan De GansUlrich S Schubert

Abstract

Methodologies for the rapid screening of coating systems were developed and applied to photopolymer lacquers for photoembossing applications. Continuous and discrete gradient libraries were prepared with a gradient in grating period along the short axis and along the long axis, a gradient in exposure energy, development temperature, film thickness, photoinitiator concentration, or monomer to polymer mass ratio. Discrete gradient libraries consisted of arrays of rectangular films made by pipetting a certain amount of sample onto a chemically patterned substrate consisting of hydrophilic patches surrounded by hydrophobic, fluorinated barriers. The shape and height of the photoembossed gratings were measured using an automated AFM. Optimum grating height was obtained for a 20-microm period at intermediate exposure energies, photoinitiator concentrations, or both. Height improves with development temperature (max 110 degrees C), monomer-to-polymer ratio (max 55 wt % monomer), and film thickness. Surface topography can also be optimized, depending on any specific application.

References

Jun 7, 2002·Journal of the Optical Society of America. A, Optics, Image Science, and Vision·Peter J Bex, Walter Makous

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Citations

Aug 4, 2007·The Review of Scientific Instruments·Brian C BerryMichael J Fasolka
Dec 3, 2016·Journal of Biomedical Materials Research. Part B, Applied Biomaterials·Nanayaa F Hughes-BrittainCees W M Bastiaansen
Jul 4, 2013·Chemistry : a European Journal·Jelle E StumpelAlbertus P H J Schenning
Oct 2, 2007·Langmuir : the ACS Journal of Surfaces and Colloids·Houyang ChenJianwen Jiang
May 13, 2014·ACS Applied Materials & Interfaces·Jelle E StumpelAlbertus P H J Schenning

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