標題: Tuning the functionalities of a mesocrystal via structural coupling
作者: Liu, Heng-Jui
Liu, Yun-Ya
Tsai, Chih-Ya
Liao, Sheng-Chieh
Chen, Ying-Jiun
Lin, Hong-Ji
Lai, Chih-Huang
Hsieh, Wen-Feng
Li, Jiang-Yu
Chen, Chien-Te
He, Qing
Chu, Ying-Hao
材料科學與工程學系
光電工程學系
光電工程研究所
Department of Materials Science and Engineering
Department of Photonics
Institute of EO Enginerring
公開日期: 14-Jul-2015
摘要: In the past decades, mesocrystal, a kind of nanocrystals with specific crystallographic orientation, has drawn a lot of attention due to its intriguing functionalities. While the research community keeps searching for new mesocrystal systems, it is equally crucial to develop new approaches to tune the properties of mesocrystals. In this work, a self-organized two-dimensional mesocrystal composed of highly oriented CoFe2O4 (CFO) nano-crystals with assistance of different perovskite matrices is studied as a model system. We have demonstrated that the strain state and corresponding magnetic properties of the CFO mesocrystal can be modulated by changing the surrounding perovskite matrix through their intimate structural coupling. Interestingly, this controllability is more strongly correlated to the competition of bonding strength between the matrices and the CFO mesocrystals rather than the lattice mismatch. When embedded in a matrix with a higher melting point or stiffness, the CFO mesocrystal experiences higher out-of-plane compressive strain and shows a stronger magnetic anisotropy as well as cation site-exchange. Our study suggests a new pathway to tailor the functionalities of mesocrystals.
URI: http://dx.doi.org/10.1038/srep12073
http://hdl.handle.net/11536/127859
ISSN: 2045-2322
DOI: 10.1038/srep12073
期刊: SCIENTIFIC REPORTS
Volume: 5
起始頁: 0
結束頁: 0
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