Full-color generation via photo-tunable mono ink for fast and elaborate printings
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초록
내용
Unlike pigment-based colors are determined by their molecular structure, diverse colors can be expressed by regular arrangements of single nanomaterials. However, techniques for constructing nanostructures have struggled to combine high precision and speed, resulting in a narrow gamut and prolonged fabrication time. Here, we report a photo-tunable mono ink that can generate a wide range of colors by controlling nanostructure. Core-shell growth controlled by polymerization precisely regulates the distance between arranged particles at a nanoscale, enabling the generation of various colors. Moreover, laterally confined arrangement induces constrained growth, thus facilitating the intricate color generation at the desired location via photo-polymerization. Upon terminating polymerization by oxygen, the generated colors are readily fixed. Utilizing programmed ultraviolet illumination, large-scale and high-resolution (~1 µm) full-color printings are demonstrated at high speed (100 mm2/s).