A novel high- refractive index episulfide- thiol polymer for nanoimprinting optical elements

作者：Tang, Yunhui; Pina-Hernandez, Carlos; Niu, Qijian; Nie, Jun^*; Cabrini, Stefano^*

来源：Journal of Materials Chemistry C, 2018, 6(32): 8823-8831.

DOI：10.1039/c8tc02029a

• LIGHT-EMITTING-DIODES
• HYPERBRANCHED POLYMERS
• INVERSE VULCANIZATION
• FACILE ROUTE
• LITHOGRAPHY
• SULFUR
• HYBRIDS
• FILMS

A novel optical polymer with a high refractive index (n = 1.707 at 590 nm) was developed consisting of episulfide and thiol bifunctional monomers. The episulfide derivative of 9,9-bis(4-glycidyloxyphenyl)fluorene, synthesized by the reaction of an epoxide and inorganic thiocyanate, reacts by a ring-opening polymerization with 4,4-thiodibenzenethiol to produce the optical polymer with high transparency over the visible region of the spectrum and thermally stable up to 290 degrees C. The developed episulfide-thiol optical polymer can be thermally nanoimprinted at 160 degrees C with nanoscale size resolution. Different nanostructures including sub-micron and nanoscale size gratings, two-dimensional photonic crystals, and plano-convex semispherical microlenses were successfully nanoimprinted with excellent pattern fidelity and low defectivity. These results exhibit the episulfide-thiol optical polymer as a potential candidate for applications in optical and optoelectronic devices.

• 出版日期2018-8-28
• 单位化工资源有效利用国家重点实验室; LBNL; 北京化工大学