Lee, Yunseo Shin, Jiyun Shin, Seungki Kim, Eun A. Lee, Joon Yup Gwak, Namyoung Kim, Seongchan Seo, Jaeyoung Kong, Hyein Yeo, Dongjoon Na, Jina Kim, Sungwon Lee, Juho Cho, Seong-Yong Lee, Jaejun Kim, Tae Ann Oh, Nuri 2025-01-23T08:00:18Z 2025-01-23T08:00:18Z 2025-01-23 2025-03 0935-9648 https://pubs.kist.re.kr/handle/201004/151658 The evolution of display technologies is rapidly transitioning from traditional screens to advanced augmented reality (AR)/virtual reality (VR) and wearable devices, where quantum dots (QDs) serve as crucial pure-color emitters. While solution processing efficiently forms QD solids, challenges emerge in subsequent stages, such as layer deposition, etching, and solvent immersion. These issues become especially pronounced when developing diverse form factors, necessitating innovative patterning methods that are both reversible and sustainable. Herein, a novel approach utilizing lipoic acid (LA) as a ligand is presented, featuring a carboxylic acid group for QD surface attachment and a reversible disulfide ring structure. Upon i-line UV exposure, the LA ligand initiates ring-opening polymerization (ROP), crosslinking the QDs and enhances their solvent resistance. This method enables precise full-color QD patterns with feature sizes as small as 3 mu m and pixel densities exceeding 3788 ppi. Additionally, it supports the fabrication of stretchable QD composites using LA-derived monomers. The reversible ROP process allows for flexibility, self-healing, and QD recovery, promoting sustainability and expanding QD applications for ultra-fine patterning and on-silicon displays. English WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim Ring-Opening Polymerization of Surface Ligands Enables Versatile Optical Patterning and Form Factor Flexibility in Quantum Dot Assemblies Article 10.1002/adma.202415436 1 Advanced Materials, v.37, no.9 Advanced Materials 37 9 Y scie scopus 001396218300001 2-s2.0-85214794033 Chemistry, Multidisciplinary Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Physics, Condensed Matter Chemistry Science & Technology - Other Topics Materials Science Physics Article LITHOGRAPHY COMPACT NANOCRYSTALS ACID LUMINESCENT direct optical lithography polymerization QD nanocomposites quantum dots