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Bio‐Assembled Nanocomposites in Conch Shells Exhibit Giant Electret Hysteresis
Author(s) -
Yao Yingbang,
Wang QingXiao,
Wang Hongtao,
Zhang Bei,
Zhao Chao,
Wang Zhihong,
Xu Zhengkui,
Wu Ying,
Huang Wei,
Qian PeiYuan,
Zhang Xi Xiang
Publication year - 2013
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201202079
Subject(s) - conch , materials science , polarization (electrochemistry) , ferroelectricity , electret , pyroelectricity , composite material , biopolymer , piezoelectricity , nanocomposite , optoelectronics , polymer , paleontology , chemistry , dielectric , biology
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.