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Synthesis and Characterization of Pressure and Temperature Dual-Responsive Polystyrene Microbeads

Authors

  • Cun Zhu,

    1. The Wallace H. Coulter Department of Biomedical Engineering, School of Chemistry & Biochemistry and School of Chemical & Biomolecular Engineering Georgia Institute of Technology, Atlanta, GA, USA
    2. State Key Laboratory of Bioelectronics School of Chemistry and Chemical Engineering, Southeast University, Nanjing, P. R. China
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  • Rui Deng,

    1. The Wallace H. Coulter Department of Biomedical Engineering, School of Chemistry & Biochemistry and School of Chemical & Biomolecular Engineering Georgia Institute of Technology, Atlanta, GA, USA
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  • Jie Zeng,

    1. The Wallace H. Coulter Department of Biomedical Engineering, School of Chemistry & Biochemistry and School of Chemical & Biomolecular Engineering Georgia Institute of Technology, Atlanta, GA, USA
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  • Gamal E. Khalil,

    1. Department of Aeronautics and Astronautics University of Washington Seattle, WA 98195, USA
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  • Dana Dabiri,

    1. Department of Aeronautics and Astronautics University of Washington Seattle, WA 98195, USA
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  • Zhongze Gu,

    1. State Key Laboratory of Bioelectronics School of Chemistry and Chemical Engineering, Southeast University, Nanjing, P. R. China
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  • Younan Xia

    Corresponding author
    • The Wallace H. Coulter Department of Biomedical Engineering, School of Chemistry & Biochemistry and School of Chemical & Biomolecular Engineering Georgia Institute of Technology, Atlanta, GA, USA
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E-mail: younan.xia@bme.gatech.edu

Abstract

A facile approach to the synthesis of pressure and temperature dual-responsive polystyrene (PS) microbeads with controlled sizes via dispersion polymerization is described. Three different luminophors are selected and directly introduced into the reaction system and thus incorporated into the resultant PS microbeads during polymerization. By manipulating the reaction conditions, including concentrations of the initiator and monomer, polarity of the reaction medium, and injection rate for the monomer, uniform PS microbeads with sizes ranging from 1 to 5 μm are obtained. When a light source centered at 365 nm is used to excite all the luminophors in the PS beads, three distinct and resolvable emission peaks corresponding well with the luminophors are observed. By taking advantage of their sensitive responses to both pressure and temperature, the PS beads can be utilized for quantitative measurements of these two stimulations simultaneously. The PS beads loaded with multiple luminophors have the ability to serve as building blocks for the fabrication of novel sensing and imaging devices and therefore provide a promising strategy for the study of aerodynamics.

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