Affiliation:
1. Department of Materials Science and Engineering Seoul National University Seoul 08826 Republic of Korea
2. Department of Electrical Engineering Pohang University of Science and Technology (POSTECH) Pohang Gyeongbuk 37673 Republic of Korea
3. Research Institute of Advanced Materials (RIAM) Seoul National University Seoul 08826 Republic of Korea
Abstract
AbstractUnlike pigment‐based colors, which are determined by their molecular structure, diverse colors can be expressed by a regular arrangement of nanomaterials. However, existing techniques for constructing such nanostructures have struggled to combine high precision and speed, resulting in a narrow gamut, and prolonged color fabrication time. Here, this work reports a phototunable mono ink that can generate a wide range of colors by controlling regularly arranged nanostructure. Core–shell growth controlled by polymerization time precisely regulates the distance between arranged particles at a nanometer‐scale, enabling the generation of various colors. Moreover, the wide and thin arrangement induces constrained out‐of‐plane growth, thus facilitating the intricate color generation at the desired location via photopolymerization. Upon terminating polymerization by oxygen gas, the generated colors are readily fixed and kept stable. Utilizing programmed ultraviolet illumination, large‐scale and high‐resolution (≈1 µm) full‐color printings are demonstrated at high speed (100 mm2 s−1).
Funder
National Research Foundation of Korea
Ministry of Science, ICT and Future Planning
Subject
Mechanical Engineering,Mechanics of Materials,General Materials Science