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Microfluidic-directed magnetic controlling supraballs with multi-responsive anisotropic photonic crystal structures

Journal of Materials Science & Technology 2021年第22期81卷 203-211页

作者： Lu-Wei Hao Ji-Dong Liu Qing Li Ren-Kun Qing Yun-Ya He Jiazhuang Guo Ge Li Liangliang Zhu Chen Xu Su Chen State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical EngineeringJiangsu Key Laboratory of Fine Chemicals and Functional Polymer MaterialsNanjing Tech University5 Xin Mofan RoadNanjing210009China State Key Laboratory of Pharmaceutical Biotechnology and School of Life Sciences Nanjing UniversityNanjing 210023China

The design and fabrication of anisotropic photonic crystal supraballs with multiple responses are highly desirable for versatile environmental sensing and flexible ***,we developed an available strategy to construct a series of multi-responsive magnetic colloidal photonic crystal(CPC)supraballs with Janus and molecular-analogue ***,the humidity and temperature sensitive CPC supraballs were obtained via immobilization of polyacrylamide(PAM)and polyisopropylacrylamide(PNIPAM)hydrogels into the CPC structure,respectively,and CdTe/ZnS quantum dots endow the supraballs fluorescent signal under UV ***,Fe_(3)O_(4) nanoparticles(NPs)were served as a magnetic hemisphere to construct CPC Janus supraballs which can be subsequently assembled into three different molecular-shaped cluster particles that integrate more response types via Fe_(3)O_(4) NPs hemisphere coalescence to a magnetic coupling center,recognizing multiple responses simultaneously that correspond the environmental *** addition,2D polychromatic patterns with sensitive CPC pixels printed by automatic printing system were demonstrated,which could monitor the changes of temperature and *** multi-responsive magnetic controlling supraballs and 2D patterns reveal the promising applications in environmental sensing,anti-counterfeiting and displaying.

关键词： Photonic crystal Multiple responses Optical sensing supraballs Microfluidics Magnetic control

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