title: Flexible and Patterned Thin Film Polarizer: Photopolymerization of Perylene-based Lyotropic Chromonic Reactive Mesogens.
abstract: A perylene-based reactive mesogen (DAPDI) forming a lyotropic chromonic liquid crystal (LCLC) phase was newly designed and synthesized for the fabrication of macroscopically oriented and patterned thin film polarizer (TFP) on the flexible polymer substrates. The anisotropic optical property and molecular self-assembly of DAPDI were investigated by the combination of microscopic, scattering and spectroscopic techniques. The main driving forces of molecular self-assembly were the face-to-face π-π intermolecular interaction among aromatic cores and the nanophase separation between hydrophilic ionic groups and hydrophobic aromatic cores. Degree of polarization for the macroscopically oriented and photopolymerized DAPDI TFP was estimated to be 99.81% at the λmax = 491 nm. After mechanically shearing the DAPDI LCLC aqueous solution on the flexible polymer substrates, we successfully fabricated the patterned DAPDI TFP by etching the unpolymerized regions selectively blocked by a photomask during the photopolymerization process. Chemical and mechanical stabilities were confirmed by the solvent and pencil hardness tests, and its surface morphology was further investigated by optical microscopy, atomic force microscopy, and three-dimensional surface nanoprofiler. The flexible and patterned DAPDI TFP with robust chemical and mechanical stabilities can be a stepping stone for the advanced flexible optoelectronic devices.
authors.affiliation: Polymer Materials Fusion Research Center, Department of Polymer-Nano Science and Technology & Department of Flexible and Printable Electronics, Chonbuk National University , Jeonju, Jeonbuk 561-756, Korea.
authors.forename: Pureun
authors.initials: P
authors.lastname: Im
authors.affiliation: Polymer Materials Fusion Research Center, Department of Polymer-Nano Science and Technology & Department of Flexible and Printable Electronics, Chonbuk National University , Jeonju, Jeonbuk 561-756, Korea.
authors.forename: Dong-Gue
authors.initials: DG
authors.lastname: Kang
authors.affiliation: Polymer Materials Fusion Research Center, Department of Polymer-Nano Science and Technology & Department of Flexible and Printable Electronics, Chonbuk National University , Jeonju, Jeonbuk 561-756, Korea.
authors.forename: Dae-Yoon
authors.initials: DY
authors.lastname: Kim
authors.affiliation: Polymer Materials Fusion Research Center, Department of Polymer-Nano Science and Technology & Department of Flexible and Printable Electronics, Chonbuk National University , Jeonju, Jeonbuk 561-756, Korea.
authors.forename: Yu-Jin
authors.initials: YJ
authors.lastname: Choi
authors.affiliation: Polymer Materials Fusion Research Center, Department of Polymer-Nano Science and Technology & Department of Flexible and Printable Electronics, Chonbuk National University , Jeonju, Jeonbuk 561-756, Korea.
authors.forename: Won-Jin
authors.initials: WJ
authors.lastname: Yoon
authors.affiliation: Polymer Materials Fusion Research Center, Department of Polymer-Nano Science and Technology & Department of Flexible and Printable Electronics, Chonbuk National University , Jeonju, Jeonbuk 561-756, Korea.
authors.forename: Myong-Hoon
authors.initials: MH
authors.lastname: Lee
authors.affiliation: Division of Advanced Materials Engineering, Chonbuk National University , Jeonju, Jeonbuk 561-756, Korea.
authors.forename: In-Hwan
authors.initials: IH
authors.lastname: Lee
authors.affiliation: Division of Advanced Materials Engineering, Chonbuk National University , Jeonju, Jeonbuk 561-756, Korea.
authors.forename: Cheul-Ro
authors.initials: CR
authors.lastname: Lee
authors.affiliation: Polymer Materials Fusion Research Center, Department of Polymer-Nano Science and Technology & Department of Flexible and Printable Electronics, Chonbuk National University , Jeonju, Jeonbuk 561-756, Korea.
authors.forename: Kwang-Un
authors.initials: KU
authors.lastname: Jeong
keywords: lyotropic chromonic liquid crystal; perylene-diimide; photopolymerization; polarizability; reactive mesogen