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Advanced Materials

Bio-Assembled Nanocomposites in Conch Shells Exhibit Giant Electret Hysteresis

Authors

  • Yingbang Yao,

    1. Nanofab, Imaging & Characterization Core Lab, King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia
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  • QingXiao Wang,

    1. Nanofab, Imaging & Characterization Core Lab, King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia
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  • Hongtao Wang,

    1. Nanofab, Imaging & Characterization Core Lab, King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia
    Current affiliation:
    1. Zhejiang University, Hangzhou 310027, P. R. of China
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  • Bei Zhang,

    1. Nanofab, Imaging & Characterization Core Lab, King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia
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  • Chao Zhao,

    1. Nanofab, Imaging & Characterization Core Lab, King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia
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  • Zhihong Wang,

    1. Nanofab, Imaging & Characterization Core Lab, King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia
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  • Zhengkui Xu,

    1. Department of Physics and Materials Science, City University of Hong Kong, Kowloon, Hong Kong, P. R. of China
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  • Ying Wu,

    1. Computer, Electrical and Mathematical Science, King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia
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  • Wei Huang,

    1. Institute of Advanced Materials, Nanjing University of Posts and Telecommunications, Nanjing 210046, P. R. of China
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  • Pei-Yuan Qian,

    1. KAUST Global Collaborative Research, Division of Life Science, Hong Kong University of Science and Technology, Hong Kong, P. R. of China
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  • Xi Xiang Zhang

    Corresponding author
    1. Nanofab, Imaging & Characterization Core Lab, King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia
    • Nanofab, Imaging & Characterization Core Lab, King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia.
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Abstract

Giant electric polarization (2000–4000 μC cm−2) is observed in natural conch shells. The nanolaminas and biopolymer layers of their unique hierarchical microstructures exhibit ferroelectret behavior and account for the observed polarization. Such huge polarization leads to extremely high pyroelectric coefficients, 2–3 orders of magnitude larger than those of conventional ferroelectric materials. The possibility of tailoring the giant polarization for various applications is considered.

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