| 학회 |
한국공업화학회 |
| 학술대회 |
2021년 가을 (11/03 ~ 11/05, 대구 엑스코(EXCO)) |
| 권호 |
25권 2호 |
| 발표분야 |
포스터-콜로이드·계면화학 |
| 제목 |
Direct-writing of viscoelastic colloidal inks for customizable patterns with structural colors |
| 초록 |
The structural-color patterns are highly valuable for their light-manipulating and stimulus-responsive properties. However, it has been hard to customize their patterning because of multi-step and complex processes. Here, we report direct-writing of photonic inks where polymer viscosity affects the colloidal crystallinity so that we can easily customize the iridescence. The high fraction of colloids is found to result in high crystallinity and printability including speed and resolution. It can print a photonic line at up to 15 mm/s and achieve the highest reflectance of more than 80% in 10 min after heating. It is interesting to find that the colloidal arrangement is decided by shear conditions during printing, and the rheological properties in this system are related to the microstructure for the first time. This strategy is innovative in that patterning can occur rapidly on any substrates with controllable mechanical traits and no waste of colloids even for multicolor patterning. |
| 저자 |
김종빈1, 채창주2, 한상훈1, 이수연2, 김신현1
|
| 소속 |
1KAIST, 2한국화학(연) |
| 키워드 |
Colloidal crystals; colloidal glasses; patterning; direct-writing; structural colors
|
| E-Mail |
|
