| 학회 |
한국고분자학회 |
| 학술대회 |
2021년 봄 (04/07 ~ 04/09, 대전컨벤션센터) |
| 권호 |
46권 1호 |
| 발표분야 |
콜로이드 및 분자조립 부문위원회 Ⅰ |
| 제목 |
Structural-Color Patterns Direct-Written with Viscoelastic Colloidal Dispersions |
| 초록 |
Nature has shown us structural-colors on plants or animals, where periodic structures are built in. The periodicity is high or low to make photonic crystals or glasses, and the structures have been artificially fabricated to serve as sensors or anticounterfeiting. Their patterning enhances the uses but it is limited to regioselectively construct the structures with high reflectance. Here, we direct-write viscoelastic colloidal dispersions to make both photonic crystal or glass patterns. The viscosity of acrylate polymer either allows or frustrates colloidal crystallization, thus making photonic crystals or glasses, respectively. High temperature accelerates the former crystallization, achieving 90% of reflectance in 10 min. The photonic inks are direct-written into either a line or face making complex patterns. The mechanical property is adjusted by polymer types so that the patterns are formed on 3D structures. This study opens a new avenue for the customization of photonic patterns. |
| 저자 |
김종빈1, 채창주2, 한상훈1, 이수연2, 김신현1
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| 소속 |
1KAIST, 2한국화학(연) |
| 키워드 |
Colloids; Photonic crystals; Photonic glasses; Patterning; Direct-writing
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| E-Mail |
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