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Bio-assembled nanocomposites in conch shells exhibit giant electret hysteresis

  • Yingbang Yao
  • , Qingxiao Wang
  • , Hongtao Wang
  • , Bei Zhang
  • , Chao Zhao
  • , Zhihong Wang
  • , Zhengkui Xu
  • , Ying Wu
  • , Wei Huang
  • , Pei Yuan Qian
  • , Xi Xiang Zhang
  • King Abdullah University of Science and Technology
  • Zhejiang University
  • City University of Hong Kong
  • Nanjing University of Posts and Telecommunications
  • Hong Kong University of Science and Technology

Research output: Contribution to journalArticlepeer-review

20 Scopus citations

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.

Original languageEnglish
Pages (from-to)711-718
Number of pages8
JournalAdvanced Materials
Volume25
Issue number5
DOIs
StatePublished - 6 Feb 2013
Externally publishedYes

Keywords

  • bio-assembled nanocomposites
  • conch shell
  • giant ferroelectret hysteresis

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