| 학회 |
한국고분자학회 |
| 학술대회 |
2021년 가을 (10/20 ~ 10/22, 경주컨벤션센터) |
| 권호 |
46권 2호 |
| 발표분야 |
기능성 고분자 |
| 제목 |
Photoswitchable Surfactant-Driven Reversible Shape- and Color-Changing Block Copolymer Particles |
| 초록 |
We report block copolymer (BCP) particles with reversible shapes and colors, activated by irradiation with UV and visible lights. This shape transformation of the BCP particles is achieved by a spiropyran-based surfactant (SP-DTAB) that changes its amphiphilicity upon photoisomerization. Under UV light (365 nm) irradiation, the hydrophilic ring-opened merocyanine form of SP-DTAB surfactant affords the formation of spherical, onion-like BCP particles. In contrast, when exposed to visible light, surfactants with the ring-closed form yields prolate or oblate BCP ellipsoids with axially stacked nanostructures. Importantly, the change in BCP particle morphology between spheres and ellipsoids is reversible over multiple UV and visible light irradiation cycles. In addition, the shape- and color-switchable BCP particles are integrated to form a composite hydrogel, demonstrating their potential as high-resolution displays with reversible patterning capabilities. |
| 저자 |
김진우1, 윤홍석2, 구강희3, 이영준4, 김범준4
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| 소속 |
1KAIST, 2한양대, 3충남대, 4카이스트 |
| 키워드 |
block copolymer particles; light-responsive polymer particles; spiropyran; photoswitchable surfactants; shape-changing particles; hydrogel display
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| E-Mail |
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