Polymer Brush Electrets

Authors

  • Xinlei Ma,

    1. Department of Chemistry, Renmin University of China, Beijing 100872, China
    2. Nanotechnology Center, Institute of Textiles and Clothing, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR, China
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  • Zhuang Xie,

    1. Nanotechnology Center, Institute of Textiles and Clothing, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR, China
    2. Advanced Research Centre for Fashion and Textiles, The Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen 518000, China
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  • Zhilu Liu,

    1. Nanotechnology Center, Institute of Textiles and Clothing, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR, China
    2. Advanced Research Centre for Fashion and Textiles, The Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen 518000, China
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  • Xuqing Liu,

    1. Nanotechnology Center, Institute of Textiles and Clothing, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR, China
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  • Tingbing Cao,

    1. Department of Chemistry, Renmin University of China, Beijing 100872, China
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  • Zijian Zheng

    Corresponding author
    1. Nanotechnology Center, Institute of Textiles and Clothing, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR, China
    2. Advanced Research Centre for Fashion and Textiles, The Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen 518000, China
    • Nanotechnology Center, Institute of Textiles and Clothing, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR, China.
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  • Dedicated to the memory of co-author Tingbing Cao, deceased March, 2012

Abstract

The charge storage properties of polymer brushes are reported for the first time. Poly(methyl methacrylate) (PMMA) brushes are explored as electrets to store electrostatic charges. Micrometer- and nanometer-scale patterns of electrostatic charges are successfully fabricated on planar and non-planar PMMA brush films by means of conductive microcontact printing and atomic force microscope lithography, where the charge storage density and stability are studied in detail with Kelvin force microscopy. Importantly, because PMMA brushes are chemically tethered on the substrate, their charge storage properties can be studied in various organic solvents, in which their bulk counterparts will be dissolved. It is found that patterned charges on PMMA brushes are stable enough in organic media, such as hexane and toluene, for guiding the assembly of Au nanoparticles in organic media and the dewetting of polymer thin films with solvent annealing. The electrets properties shall add a new dimension of functionality, apart from the conventional chemical and physical properties, to polymer brushes for a wide range of applications in materials science, nanotechnology, and electronic devices.

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