| 학회 |
한국고분자학회 |
| 학술대회 |
2021년 가을 (10/20 ~ 10/22, 경주컨벤션센터) |
| 권호 |
46권 2호 |
| 발표분야 |
고분자구조 및 물성 |
| 제목 |
Light-Driven Shape Transformation of 3D Block Copolymer Particles using Azobenzene-Coated Au Nanoparticles |
| 초록 |
A simple and robust strategy for light-driven shape transformation of block copolymer (BCP) particles is reported in a reversible manner using azobenzene-grafted Au nanoparticles (Au@Azo NPs). The key strategy for the shape transition of BCP particles is to introduce 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. Otherwise, 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 wetting behavior of BCP domains by light irradiation. Furthermore, light-active fluorescence is achieved by the shape transformation of the hybrid particles by adding the dye molecules, allowing shape-dependent non-radiative energy transfer between the dyes and Au@Azo NPs. |
| 저자 |
권승호1, 윤홍석2, 쉬멍1, 김진우1, 김은지1, 이영준1, 장세규3, 김범준1
|
| 소속 |
1KAIST, 2한양대, 3KIST |
| 키워드 |
light-responsive particles; block copolymer particles; gold nanoparticles; photo-responsive surfactants; azobenzene
|
| E-Mail |
|
