| 학회 |
한국고분자학회 |
| 학술대회 |
2021년 봄 (04/07 ~ 04/09, 대전컨벤션센터) |
| 권호 |
46권 1호 |
| 발표분야 |
고분자구조 및 물성 |
| 제목 |
Photo-Responsive Shape Transition of Block Copolymer Particles using Azobenzene-Coated Au Nanoparticles |
| 초록 |
Photo-responsive PS-b-P2VP/AuNP polymer nanocomposite systems with controlled 3D nanostructures were reported in a reversible manner. The key strategy is to attach Azobenzene-based ligand to the AuNP surface, whose polarity changes reversibly due to the photoisomerization of Azobenzene according to specific light wavelength. Under the visible light, spherical shape BCP particles were created with evenly distribution of AuNPs on the PS-outmost layer. Otherwise, ellipsoidal particles were observed under UV irradiation in which both PS and P2VP blocks were exposed to the particles surface and AuNPs located at the PS/P2VP interface. We noted that the Azobenzene-coated AuNPs could be modulated the surface wetting behavior of BCP domains by light, inducing the shape transition of colloidal particles and selective localization of AuNPs. We expect the reversible photo-active hybrid systems can be applied in practical applications such as photo-patterning or molecular sensor. |
| 저자 |
권승호, 김진우, 쉬멍, 김은지, 이영준, 윤홍석, 김범준
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| 소속 |
KAIST |
| 키워드 |
block copolymer particles; polymer nanocomposites; light-responsive; azobenzene; photoisomerization; reversible
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| E-Mail |
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