An explanation for bends of 1-dimensional nanorods
An explanation for bends of 1-dimensional nanorods
复制标题
一维纳米棒弯曲的解释
DOI：
10.1016/j.phpro.2012.06.320
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
Yoshida Yutaka
中科院分区：
文献类型：
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作者：
Mukaida M;Ichinose Ataru;Mele Paolo;Matsumoto Kaname;Horii Shigeru;Yoshida Yutaka
讨论了YBa2Cu3O7bYBCO(δ)薄膜中人工钉扎中心(APC)的生长。本研究中使用的APC是由Mele等人报道的BaZrO_3和BaSnO_3纳米棒。透射电子显微镜图像显示，随着接近薄膜表面，这些纳米棒逐渐弯曲。这一特征显示出一种烟花般的增长模式。我们解释了纳米棒的特征如下：在生长的早期阶段，薄膜以逐层生长的方式生长。薄膜的表面很平整，非常光滑。经过早期生长阶段后，薄膜表面逐渐变得粗糙，表明薄膜是以斯特兰基-克拉斯塔诺夫生长模式生长的。这种粗糙度是由多步螺旋生长的薄膜引起的。在YBCO薄膜的制备阶段，BaZrO_3等纳米棒材料是单向提供的。然后，纳米棒的中心筛向与阶梯流相同的方向。然后，纳米棒弯曲到薄膜中颗粒的边缘。由于螺旋生长的颗粒具有凸起的表面，纳米棒沿垂直于颗粒表面的方向弯曲。最后，粗糙颗粒中的纳米棒形成了烟花结构。2011年由爱思唯尔有限公司出版。由Horst Rogalla和Peter Kes负责的评选和/或同行评审。
Growth of artificial pinning centers (APCs) in YBa2Cu3O7bδ (YBCO) films are discussed. The APCs used in this research are BaZrO3 and BaSnO3 nanorods which are reported by Mele et al. TEM images show these nanorods gradually bend accordingly with approaching to a surface of films. This feature showed a growth pattern like a firework. We explain the feature of the nanorods as follows; At an early growth stage, films grow in a layer by layer growth mode. The surface of the films is flat and very smooth. After the early growth stage, the film surface gradually becomes rough, indicating the film grows in a Stranski-Krastanov growth mode. This roughness was caused by a spiral growth of films with many steps. At the step of YBCO films, nanorod materials such as BaZrO3 are supplied from one direction. Then, the center of nanorods sifts to the same direction of the step flow. Then, the nanorods bend to the edge of the grains in the films. As a grain in spiral growth had a convex surface, nanorods bent to the direction perpendicular to the grain surface. Finally, nanorods in rough grains form firework structures. cO 2011 Published by Elsevier Ltd. Selection and/or peer-review under responsibility of Horst Rogalla and Peter Kes.