| 论文标题 |
Nanoscale Detection of Interfacial Charge Mobility in BaTiO3/PVDF Nanocomposite |
| 作者 |
Yuqing Chen, Jun Zhou,* Yongfei Li, Chengxiang Chen, Beibei Jia, Haomin Guo, Zixuan Zhang, and Kai Wu* |
| 发表/完成日期 |
2022-03-23 |
| 期刊名称 |
ACS Applied Nano Materials |
| 期卷 |
|
| 相关文章 |
|
| 论文简介 |
Polymer-based dielectric composites with inorganic oxide fillers could exhibit synergistic physical and
chemical characteristics from both advantages, which have flexible applications in electrical and
electronic technology. As composites with various substances, the interface structure plays a key role in
the electric and dielectric properties. In this work, BaTiO3 particles were embedded in polyvinylidene
fluoride (PVDF) by a solution crystallization process. The conductivity and dielectric constant of the
composites increased with the increase of BaTiO3 filler contents. The charge injection and dissipation
behavior in the nano-interface of the composite is investigated by Kelvin Probe Force Microscopy
(KPFM). It is found that the charges are more easily injected into the nano-interface between the particle
and the polymer. The accumulation and dissipation of surface charges obey the exponential law. The
space charge polarization is also suggested to be a key factor of injection, while the charge dissipation is
determined by the charge tunneling. The result is also demonstrated that the strong interfacial polarization
between the BaTiO3 particles and the PVDF matrix played a crucial role in the dielectric properties. This
work provides significant insights on understanding the interfacial charge transport in dielectric
composites. |
(创新港)
