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Effect of Solvent, Hydrogen Bonding, and thickness of Azopolymer Films on Surface Relief Grating

Published online by Cambridge University Press:  01 February 2011

Woo-Hyuk Jung ,
Dong-Yu Kim ,
Jayant Kumar  and
Stephen P. McCarthy
Woo-Hyuk Jung
Affiliation:
[email protected], University of Massachusetts Lowell, Plastics Engineering, One University Ave, Lowell, MA, 01854, United States, 978-453-2426
Dong-Yu Kim
Affiliation:
[email protected], Kwang-Ju Institute of Science and Technology, Materials Science and Engineering, Korea, Republic of
Jayant Kumar
Affiliation:
[email protected], University of Massachusetts Lowell, Chemistry, United States
Stephen P. McCarthy
Affiliation:
[email protected], University of Massachusetts Lowell, Plastics Engineering, United States
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Abstract

Epoxy-based copolymers were synthesized with N,N-diglycidyl aniline (DGA) and aniline (An), called poly(DGA-co-An), where azo coupling reactions were performed using amino benzonitrile (ABN) and nitro aniline (NA). Two azopolymers were dissolved with both tetrahydrofuran (THF)/dioxane complex solvent and THF to compare the diffraction efficiencies according to solvent. The thin films spin-cast with THF/dioxane showed the better diffractive efficiency than with THF due to the high boil point of the residual dioxane. The azopolymers of two azo bonds were spin-coated at 800 and 1300 rpm where the thicker film showed the better diffractive efficiency. The epoxy-based copolymers synthesized with diglycidyl ether of bisphenol A (DGEBA) and aniline (An) or 3-hydroxyl aniline (HAn) were coupled with hydroxyl nitro amino benzene (HNAB). Hydroxyl groups in chromophores helped to form hydrogen bonding with the nitrogen atoms in the azo bonds and prevented photoisomerization, showing no surface relief gratings under a normal laser intensity of 100 mW/cm2. Polyurethane-based azopolymers were synthesized with disperse orange 17 (DO17) and toluene-2,4-diisocyanate (TDI), which were no hydroxide groups in the main chains, and showed the better diffractive efficiency than the epoxy-based azopolymers with nitro substituents.

Keywords

lithography (removal)surface reactionelectronic material
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 889: Symposium W – Electroresponsive Polymers and Their Applications , 2005 , 0889-W05-04
Copyright
Copyright © Materials Research Society 2006

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References

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