Anisotropically Alignable Magnetic Boron Nitride Platelets Decorated with Iron Oxide Nanoparticles
- Authors
- Lim, Ho Sun; Oh, Jin Woo; Kim, So Yeon; Yoo, Myong-Jae; Park, Seong-Dae; Lee, Woo Sung
- Issue Date
- Aug-2013
- Publisher
- AMER CHEMICAL SOC
- Citation
- CHEMISTRY OF MATERIALS, v.25, no.16, pp 3315 - 3319
- Pages
- 5
- Journal Title
- CHEMISTRY OF MATERIALS
- Volume
- 25
- Number
- 16
- Start Page
- 3315
- End Page
- 3319
- URI
- https://scholarworks.sookmyung.ac.kr/handle/2020.sw.sookmyung/147439
- DOI
- 10.1021/cm401488a
- ISSN
- 0897-4756
1520-5002
- Abstract
- To effectively utilize the anisotropic characteristics of hexagonal boron nitride (h-BN), we have developed magnetic h-BN hybrid platelets decorated with iron oxide (Fe3O4) nanoparticles, which are used as magnetic carriers for tailoring the anisotropy of h-BN. The as-synthesized Fe3O4-coated h-BN powders can easily move under a relatively low magnetic field. With the aid of iron oxide nanoparticles, h-BN platelets randomly dispersed in an epoxy matrix are successfully reoriented in a direction vertical to the film plane. Moreover, by utilizing the anisotropic characteristics of h-BN platelets, Fe3O4-coated h-BN/epoxy composites exhibit exceptional performance in terms of in-plane thermal conductivity. This result is attributed to an improvement in the heat-transport pathways in composite films due to the anisotropic ordering of thermally conductive h-BN sheets. The Fe3O4-decorated h-BN platelets will be promising candidates for significantly improving the performances of advanced electronic devices that require excellent thermal conductivity and electrical insulation.
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