POS5-0538

Chiral Conjugated Polymer Nanowire Templates for CPL-Responsive Ferroelectric Encoding in Soft Electronics

When and Where

Nov 30, -0001 00:00 - 00:00

Presenter(s)

Jeongmin Ji (Department of Materials Science and Engineering, Gwangju Institute of Science and Technology (GIST), GIST InnoCORE AI-ACE Nano Convergence Institute for Early Detection of Neurodegenerative Diseases)

Co-Author(s)

Eunji Lee (Department of Materials Science and Engineering, Gwangju Institute of Science and Technology (GIST), Department of Chemistry, Gwangju Institute of Science and Technology (GIST), GIST InnoCORE AI-ACE Nano Convergence Institute for Early Detection of Neurodegenerative Diseases), Young Min Song (School of Electrical Engineering, Korea Advanced Institute of Science and Technology (KAIST), GIST InnoCORE AI-ACE Nano Convergence Institute for Early Detection of Neurodegenerative Diseases), Min Seok Kim (School of Electrical Engineering and Computer Science, Gwangju Institute of Science and Technology (GIST)), Jun Ho Hwang (Department of Materials Science and Engineering, Gwangju Institute of Science and Technology (GIST), GIST InnoCORE AI-ACE Nano Convergence Institute for Early Detection of Neurodegenerative Diseases), Junyeon Yoon (Department of Materials Science and Engineering, Gwangju Institute of Science and Technology (GIST)), Minju Park (Department of Materials Science and Engineering, Gwangju Institute of Science and Technology (GIST))

Abstract

Converting supramolecular handedness into readable, nonvolatile electrical states remains a largely unexplored direction in soft-matter security hardware, where most chiral systems are confined to transient optical readouts. This study realizes circularly polarized light (CPL)-responsive physically unclonable functions (PUFs) by combining block copolymer self-assembly, conjugated polymer crystallization, and ferroelectric physics in a purely polymeric platform. Enantiomeric limonene, introduced during nucleation, directs the crystallization-driven self-assembly of P3HT-b-PMMA into right- and left-handed (P- and M-) helical nanowires with ordered π–π stacking. The insulating PMMA corona prevents macrophase separation within the ferroelectric poly(vinylidene fluoride-co-trifluoroethylene) (P(VDF-TrFE)) matrix while mediating weak interfacial dipolar coupling between the helical backbone and ferroelectric C–F dipoles. This coupling imparts a small but reproducible handedness-dependent bias to the remanent polarization. Under CPL with an applied field, opposite-handed domains respond asymmetrically, with P-helical devices favoring right-handed CPL (RCP) and M-helical devices favoring left-handed CPL (LCP), forming mirror-symmetric polarization patterns. The stochasticity of these self-assembled networks generates spatially heterogeneous entropy that, after von Neumann debiasing, yields 256-bit tokens with near-ideal uniformity (~0.5) and inter-device Hamming distances (~0.4) for secure optoelectronic encoding and anti-counterfeiting.

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