Fabrication and mechanical properties of column–particle nanocomposites by multiscale shape-assisted self-assembly
Fabrication and mechanical properties of column–particle nanocomposites by multiscale shape-assisted self-assembly
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多尺度形状辅助自组装柱状颗粒纳米复合材料的制备和机械性能
DOI：
10.1088/0022-3727/45/2/025302
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
K. Minoshima
中科院分区：
文献类型：
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作者：
H. Hirakata;Yoshifumi Ajioka;A. Yonezu;K. Minoshima
我们提出了一种多尺度形状辅助自组装，结合了有序的纳米柱的掠射角沉积（GLAD）和组装的胶体纳米粒子，通过利用毛细管力的增长。在这项工作中，在第一次自组装中，SiO2纳米柱阵列生长的GLAD，其中列的大小和间隔定期控制使用预图案化的核在衬底上。在第二次自组装中，使用异丙醇（IPA）或水胶体悬浮液将SiO2球形纳米颗粒组装成纳米柱阵列，形成柱-颗粒纳米复合材料。组装的纳米颗粒的位置和数量可以通过选择悬浮液（IPA或水）和颗粒浓度来控制。金刚石平冲加载实验表明，纳米复合材料的初始刚度和断裂强度显着增加相比，没有纳米颗粒的纳米柱阵列。纳米颗粒在纳米柱之间的组装有效地抑制了纳米柱的变形和断裂。因此，多尺度形状辅助自组装能够合成具有优异机械性能以及大表面积的柱状颗粒纳米复合材料。
We propose a multiscale shape-assisted self-assembly that combines the growth of ordered nanocolumns by glancing angle deposition (GLAD) and the assembly of colloidal nanoparticles by utilizing capillary force. In this work, in the first self-assembly, a SiO2 nanocolumn array was grown by GLAD wherein the column size and interval were regularly controlled using pre-patterned nuclei on a substrate. In the second self-assembly, SiO2 spherical nanoparticles were assembled into the nanocolumn array using an isopropyl alcohol (IPA) or a water colloidal suspension, creating a column–particle nanocomposite. The location and quantity of the assembled nanoparticles could be controlled by choice of the suspension (IPA or water) and the particle concentration. Loading experiments with a diamond flat punch revealed that the initial stiffness and fracture strength of the nanocomposite are significantly increased compared with the nanocolumn array without nanoparticles. The assembled nanoparticles between the nanocolumns effectively constrained the deformation and fracture of the nanocolumns. The multiscale shape-assisted self-assembly thus enabled the synthesis of column–particle nanocomposites with excellent mechanical properties as well as large surface areas.
液膜中纳米颗粒二维自组织的多尺度模拟
DOI：
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发表时间：
2004
期刊：
Japanese Journal of Applied Physics 43
影响因子：
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作者：
Masahiro Fujita;Hiroyuki Nishikawa;Tatsuya Okubo;Yukio Yamaguchi
通讯作者：
Yukio Yamaguchi