Ferroelectric BaTiO3 Nanowires by a Topochemical Solid-State Reaction
Ferroelectric BaTiO3 Nanowires by a Topochemical Solid-State Reaction
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DOI：
10.1021/cm9015047
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发表时间：
2009-11-10
影响因子：
8.6
通讯作者：
Nanni, Paolo
中科院分区：
文献类型：
--
作者：
Buscaglia, Maria Teresa;Harnagea, Catalin;Nanni, Paolo
一种新型铁电有序的可能存在以及探索铁电纳米结构中磁畴排列的需要刺激了铁电纳米线生长的日益活跃。在本研究中，使用涂有 BaCO3 纳米晶体的层状二氧化钛纳米线作为反应模板，通过原始固态工艺获得了具有四方结构的单晶 BaTIO3 纳米线。 BaTiO3 的形成发生在 700 摄氏度的拓扑化学反应中。因此，二氧化钛纳米线的初始形态保留在最终产品中。压电响应力显微镜测量显示出强烈的压电活性和域宽度为 20-50 nm 的条纹域图案、主要的面内响应和 90 度域壁。所提出的合成方法非常通用，可以适用于制造不同的铁电和非铁电氧化物纳米线。
The possible existence of a new kind of ferroelectric order and the need to explore domain arrangement in ferroelectric nanostructures has stimulated an increasing activity on the growth of ferroeletric nanowires In the present study, single crystal BaTIO3 nanowires with tetragonal structure were obtained by an original solid-state process using layered titania nanowires coated with BaCO3 nanocrystals as reactive templates. Formation of BaTiO3 occurs at 700 degrees C by a topochemical reaction. Consequently, the initial morphology of the titania nanowires is retained in the final product Piezoresponse force microscopy measurements show a strong piezoactivity and stripe domain patterns with domain width of 20-50 nm, predominant in-plane response and 90 degrees domain walls. The proposed synthesis method is quite general and might be adapted to the fabrication different ferroelectric and nonferroelectric oxide nanowires.