Two-step self-assembly of nanodisks into plate-built cylinders through oriented aggregation.
Two-step self-assembly of nanodisks into plate-built cylinders through oriented aggregation.
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DOI：
10.1021/jp050641m
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发表时间：
2005-06
期刊：
影响因子：
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通讯作者：
Yao Cheng;Yuansheng Wang;Yuanhui Zheng;Yong‐Hai Qin
中科院分区：
文献类型：
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作者：
Yao Cheng;Yuansheng Wang;Yuanhui Zheng;Yong‐Hai Qin
公开了在不存在任何有机添加剂的情况下，在酸性溶液中进行的具有空腔的六边形LaF 3纳米盘到板构建圆柱体中的基于定向聚集的自组装。自组装包括两个步骤。首先，纳米盘通过主要通过{100}面聚结而依次聚集在一起，以形成更大的单晶片，然后通过奥斯特瓦尔德熟化使其表面光滑。主要纳米盘上的孔应该是这种有趣生长的原因。第二，将表面平滑的板沿着[001]方向彼此面对面地堆叠以构建圆柱体。酸性条件被认为是该系统中的定向聚集的先决条件。
Oriented aggregation-based self-assembly of hexagonal LaF3 nanodisks with cavities into plate-built cylinders proceeding in acidic solution in the absence of any organic additive was disclosed. The self-assembly consists of two steps. First, the nanodisks sequentially aggregated together by coalescence mainly through {100} planes to form larger monocrystalline plates, followed by Ostwald ripening to smooth their surfaces. The holes on the primary nanodisks should be responsible for this intriguing growth. Second, the surface-smoothed plates were stacked face-to-face with each other along the [001] direction to construct the cylinders. The acidic condition was found to be a prerequisite for the oriented aggregations in this system.