Hierarchical interfaces induce high dielectric permittivity in nanocomposites containing TiO2@BaTiO3 nanofibers
文献类型：期刊论文
| 作者 | Zhang, X ; Chen, WW ; Wang, JJ ; Shen, Y ; Gu, L ; Lin, YH ; Nan, CW |
| 刊名 | NANOSCALE
 |
| 出版日期 | 2014 |
| 卷号 | 6期号:12页码:6701 |
| ISSN号 | 2040-3364 |
| 通讯作者 | Shen, Y (reprint author), Tsinghua Univ, State Key Lab New Ceram & Fine Proc, Sch Mat Sci & Engn, Beijing 100084, Peoples R China. |
| 中文摘要 | Interface issues are common and crucial in nanocomposites or nanohybrid systems since the interface area is enormous on the nanoscale. In the 0-3 dimensional polymer nanocomposites, in which nano-inclusions (0-dimension) are embedded in a 3-dimensionally connected polymer matrix, enhanced dielectric permittivity could be induced by the interfacial polarization at the interfaces between the nano-inclusions and the polymer matrix. In this contribution, we propose and demonstrate that the topological structure of the interface plays an equally important role as the area of the interface in determining the dielectric polarization of polymer nanocomposites. TiO2 nanofibers embedded with BaTiO3 nanoparticles are prepared via electrospinning and then fused with polyvinyl difluoride (PVDF) into polymer nanocomposite films. Modulation of hierarchical interfaces is thus achieved for these nanocomposites. The confinement of these additional interfaces inside the TiO2 nanofibers leads to percolated networks formed by the interfacial regions. The dielectric permittivity of the polymer nanocomposites is thus enhanced by similar to 300% over the PVDF matrix at a low filler loading of 11 vol%. A phase-field simulation study indicates that the enhanced dielectric permittivity could be attributed to the increased polarization in the percolated interfacial regions inside the TiO2 nanofibers. The instantaneous electrical breakdown of the TiO2@BaTiO3 nanofibers studied by the in situ transmission electron microscopy method further reveals the striking feature that the breakdown behavior of the nanofibers changes from semiconductive to metallic with the incorporation of insulating BaTiO3 nanoparticles. |
| 资助信息 | NSF of China [51102142, 51222204]; Specialized Research Fund for the Doctoral Program of Higher Education [20110002120004]; Foundation for the Authors of National Excellent Doctoral Dissertations of China [201144]; Beijing Nova Program [XX2013037]; Tsinghua University [20121087925] |
| 语种 | 英语 |
| 公开日期 | 2015-04-14 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/59360]  |
| 专题 | 物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文 |
| 推荐引用方式 GB/T 7714 | Zhang, X,Chen, WW,Wang, JJ,et al. Hierarchical interfaces induce high dielectric permittivity in nanocomposites containing TiO2@BaTiO3 nanofibers[J]. NANOSCALE,2014,6(12):6701. |
| APA | Zhang, X.,Chen, WW.,Wang, JJ.,Shen, Y.,Gu, L.,...&Nan, CW.(2014).Hierarchical interfaces induce high dielectric permittivity in nanocomposites containing TiO2@BaTiO3 nanofibers.NANOSCALE,6(12),6701. |
| MLA | Zhang, X,et al."Hierarchical interfaces induce high dielectric permittivity in nanocomposites containing TiO2@BaTiO3 nanofibers".NANOSCALE 6.12(2014):6701. |
入库方式： OAI收割
来源：物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。