title: Free-Standing and Circular-Polarizing Chirophotonic Crystal Reflectors: Photopolymerization of Helical Nanostructures.
abstract: The preparation of materials exhibiting structural colors has been intensively studied in biomimetic science and technology. Utilizing a newly synthesized cholesteric liquid-crystal (CLC) monomer (abbreviated as BP1CRM), we have prepared CLC films. Photoinitiated copolymerization of this monomer with a common achiral liquid-crystalline monomer produced free-standing films with homogeneous and nanoscale pitch distributions. Employing the thermal sensitivity of the CLC monomer, chirophotonic crystal reflectors were prepared exhibiting a range of colors. The free-standing and circular-polarizing chirophotonic crystal films maintain excellent thermal, mechanical, and chemical stabilities, and the composition can readily be applied as polarized optical films and smart paints.
authors.forename: Dae-Yoon
authors.initials: DY
authors.lastname: Kim
authors.forename: Changwoon
authors.initials: C
authors.lastname: Nah
authors.forename: Shin-Woong
authors.initials: SW
authors.lastname: Kang
authors.forename: Seung Hee
authors.initials: SH
authors.lastname: Lee
authors.affiliation: U.S. Air Force Research Laboratory, Wright-Patterson Air Force Base , Ohio 45433-7750, United States.
authors.forename: Kyung Min
authors.initials: KM
authors.lastname: Lee
authors.affiliation: U.S. Air Force Research Laboratory, Wright-Patterson Air Force Base , Ohio 45433-7750, United States.
authors.forename: Timothy J
authors.initials: TJ
authors.lastname: White
authors.forename: Kwang-Un
authors.initials: KU
authors.lastname: Jeong
keywords: circular-polarizing; free-standing; helical nanostructure; photonic crystal; photopolymerization