| 학회 |
한국공업화학회 |
| 학술대회 |
2021년 가을 (11/03 ~ 11/05, 대구 엑스코(EXCO)) |
| 권호 |
25권 2호 |
| 발표분야 |
포스터-고분자 |
| 제목 |
Light-Active Shape Transition of Block Copolymer Particles using Azobenzene-Coated Au Nanoparticles |
| 초록 |
A simple and robust strategy for light-active shape transition of block copolymer (BCP) particles is reported using azobenzene-grafted Au nanoparticles (Au@Azo NPs) in a reversible manner. The key strategy for the shape transition of BCP particles is to exploit Au@Azo NPs as surfactants, whose polarity can be changed by photoisomerization according to the light of a specific wavelength. Under the visible light, spherical BCP particles are created with evenly distribution of Au@Azo NPs on the PS-outmost layer. By contrast, ellipsoidal particles are generated under UV irradiation in which both PS and P2VP blocks are exposed to the particles surface. We note that the Au@Azo NPs can be modulated the interfacial interaction of BCP domains by light stimuli. This work suggests a novel approach of using Au@Azo NPs for generating dynamic interfacial behavior at oil/water interface to design light-driven shape-switching of hybrid particles. |
| 저자 |
권승호1, 쉬멍1, 김진우1, 김은지1, 이영준1, 장세규2, 윤홍석3, 김범준1
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| 소속 |
1KAIST, 2KIST, 3한양대 |
| 키워드 |
light-responsive particles; block copolymer particles; gold nanoparticles; photo-responsive surfactants; azobenzene
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| E-Mail |
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