Bio‐Assembled Nanocomposites in Conch Shells Exhibit Giant Electret Hysteresis

@article{Yao2013BioAssembledNI,
  title={Bio‐Assembled Nanocomposites in Conch Shells Exhibit Giant Electret Hysteresis},
  author={Yingbang Yao and Qingxiao Wang and Hongtao Wang and Bei Zhang and Chao Zhao and Zhihong Wang and Zhengkui Xu and Ying Wu and Wei Huang and Pei-Yuan Qian and Xi Xiang Zhang},
  journal={Advanced Materials},
  year={2013},
  volume={25}
}
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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