Yu, Dongmin Jang, Eunji Wi, Youngjae Hyeong, Jaeseok Lee, Kyung Min Godman, Nicholas P. Mcconney, Michael E. De Sio, Luciano Lim, Seok-In Jeong, Kwang-Un 2025-03-22T12:00:12Z 2025-03-22T12:00:12Z 2025-03-19 2025-03 1616-301X https://pubs.kist.re.kr/handle/201004/151978 The newly designed triphenylamine (TPA) based asymmetric monomer (TPA-A) is synthesized for the development of a high-security information encryption system. TPA-A exhibits photoluminescence (PL) emission and redox-active electrochromic (EC) properties, highlighting its potential as a smart encryptable ink. Introducing a methyl group to one side branch of the TPA-A induces a steric hindrance effect, enabling TPA-A to form a self-assembled lamello-columnar structure. This structural modification reduces the phase transition temperature and simultaneously allows for the uniaxial orientation of TPA-A by a simple shear-coating process. The uniaxially oriented and self-assembled TPA-A thin films exhibits polarization-dependent PL properties and electrofluorochromic (EFC) characteristics combined with redox-responsive EC properties. The selective photopolymerization of polarization-dependent TPA-A thin film generates a dual-mode information encryption system. The newly developed EC smart film can open a new door for optoelectronic information encryption and anti-counterfeiting technologies. English John Wiley & Sons Ltd. Electrochromic Encryption and Decryption Smart Films Fabricated by Selective Photopolymerization of Polarization-Dependent Triphenylamine-Based Thin Films Article 10.1002/adfm.202420062 1 Advanced Functional Materials, v.35, no.11 Advanced Functional Materials 35 11 N scie scopus 001406853200001 2-s2.0-85216366469 Chemistry, Multidisciplinary Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Physics, Condensed Matter Chemistry Science & Technology - Other Topics Materials Science Physics Article AGGREGATION-INDUCED EMISSION DERIVATIVES optical information encryption photopolymerization triphenylamine aggregation-induced emission electrochromism