Inverse size-dependence of piezoelectricity in single BaTiO 3 nanoparticles

  • Sung Dae Kim
  • , Geon Tae Hwang
  • , Kyung Song
  • , Chang Kyu Jeong
  • , Kwi Il Park
  • , Jinhyuk Jang
  • , Kwang Ho Kim*
  • , Jungho Ryu
  • , Si Young Choi
  • *Corresponding author for this work

Research output: Contribution to journalJournal articlepeer-review

Abstract

The piezoelectric charge coefficients d 33 of single BaTiO 3 (BT) nanoparticles (NPs) were characterized using a transmission electron microscope (TEM) that is equipped with a precise charge meter and an in-situ TEM indentation holder that enables controlled compression experiments. An exceptionally high d 33 of 1775 pC/N was obtained in NPs that are smaller than the critical diameter (D; typically known as < 100 nm) that has been regarded as the lower limit to permit for ferroelectricity in BT. The mechanical conversion efficiency of piezoelectric BT nanogenerators enhanced as D of BT NPs was decreased; this result corresponds with the single-NP compression measurements of d 33 . This quantification of the effect of D in ferroelectric materials may guide development of efficient and high-powered nanostructured piezoelectric energy devices such as piezoelectric nanogenerators.

Original languageEnglish
Pages (from-to)78-84
Number of pages7
JournalNano Energy
Volume58
DOIs
StatePublished - 2019.04

Keywords

  • Ferroelectric
  • In-situ TEM
  • Nanogenerator
  • Piezoelectric
  • Size effect
  • STEM

Quacquarelli Symonds(QS) Subject Topics

  • Materials Science
  • Engineering - Electrical & Electronic
  • Engineering - Petroleum

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