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One-Dimensional Piezoelectric BaTiO3 Polycrystal of Topochemical Mesocrystal Conversion from Layered H2Ti4O9·H2O Single Crystal
Crystal Growth & Design ( IF 3.2 ) Pub Date : 2018-11-14 00:00:00 , DOI: 10.1021/acs.cgd.8b00351 Dengwei Hu 1 , Lei Miao 1 , Zhen Zhang 1 , Lijie Li 1 , Yan Wang 1 , Hualei Cheng 1 , Galhenage A. Sewvandi 2 , Qi Feng 3 , Mingjin Fan 1 , Lifang Zhao 1
Crystal Growth & Design ( IF 3.2 ) Pub Date : 2018-11-14 00:00:00 , DOI: 10.1021/acs.cgd.8b00351 Dengwei Hu 1 , Lei Miao 1 , Zhen Zhang 1 , Lijie Li 1 , Yan Wang 1 , Hualei Cheng 1 , Galhenage A. Sewvandi 2 , Qi Feng 3 , Mingjin Fan 1 , Lifang Zhao 1
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A one-dimensional (1D) piezoelectric BaTiO3(BT) polycrystal with a tetragonal system was controllably prepared using a one-step hydrothermal soft chemical process. A layered H2Ti4O9·H2O (HTO) single crystal was used as the precursor. Interestingly, the obtained polycrystalline BT constructed from oriented BT nanoparticles shows a set of single-crystalline diffraction points, implying that the BT polycrystal is a mesocrystal. The [010] and [001] directions of the obtained mesocrystalline BT correspond to the [001] and [010] directions of the original HTO crystal, respectively, and the [010] direction of the mesocrystalline BT corresponds to the direction along the length of a 1D rod matrix. An in situ topochemical mesocrystal conversion of mesocrystalline BT grown on the HTO substrate occurred not only on the substrate surface but also in the interlayers owing to the unique TiO6 octahedral layers of HTO. In addition, the piezoelectric response of the 1D mesocrystal was captured for the first time. The piezoelectric property of BT mesocrystals hinges on its nanostructure. It is a challenge to develop a special process to prepare highly 1D anisotropic perovskite titanate polycrystals with high crystallinity and piezoelectric response. This novel strategy can be utilized to develop piezoelectric mesocrystalline materials.
中文翻译：
层状H 2 Ti 4 O 9 ·H 2 O单晶拓扑化学介晶的一维压电BaTiO 3多晶。
使用一步水热软化学过程可控地制备了具有四方晶系的一维（1D）压电BaTiO 3（BT）多晶体。层状的H 2 Ti 4 O 9 ·H 2O（HTO）单晶用作前驱体。有趣的是，由取向的BT纳米粒子构成的所得多晶BT表现出一组单晶衍射点，这意味着BT多晶是介晶。所获得的介晶BT的[010]和[001]方向分别与原始HTO晶体的[001]和[010]方向相对应，介晶BT的[010]方向与沿长度方向相对应。一维棒矩阵 由于独特的TiO 6，在HTO衬底上生长的介晶BT的原位拓扑化学介晶转化不仅发生在衬底表面，还发生在中间层中HTO的八面体层。此外，第一次捕获了1D介晶的压电响应。BT介晶的压电特性取决于其纳米结构。开发一种特殊的工艺来制备具有高结晶度和压电响应的高一维各向异性钙钛矿钛酸酯多晶体是一项挑战。这种新颖的策略可用于开发压电介晶材料。
更新日期：2018-11-14
中文翻译：
层状H 2 Ti 4 O 9 ·H 2 O单晶拓扑化学介晶的一维压电BaTiO 3多晶。
使用一步水热软化学过程可控地制备了具有四方晶系的一维（1D）压电BaTiO 3（BT）多晶体。层状的H 2 Ti 4 O 9 ·H 2O（HTO）单晶用作前驱体。有趣的是，由取向的BT纳米粒子构成的所得多晶BT表现出一组单晶衍射点，这意味着BT多晶是介晶。所获得的介晶BT的[010]和[001]方向分别与原始HTO晶体的[001]和[010]方向相对应，介晶BT的[010]方向与沿长度方向相对应。一维棒矩阵 由于独特的TiO 6，在HTO衬底上生长的介晶BT的原位拓扑化学介晶转化不仅发生在衬底表面，还发生在中间层中HTO的八面体层。此外，第一次捕获了1D介晶的压电响应。BT介晶的压电特性取决于其纳米结构。开发一种特殊的工艺来制备具有高结晶度和压电响应的高一维各向异性钙钛矿钛酸酯多晶体是一项挑战。这种新颖的策略可用于开发压电介晶材料。
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