Department of Applied Chemistry, National Chiao Tung University, Hsinchu, Taiwan 30050.
Nanoscale. 2014;6(3):1340-6. doi: 10.1039/c3nr04431a.
Although nanostructures with diverse morphologies have been fabricated, it is still a great challenge to prepare anisotropic two-dimensional (2-D) nanostructures, especially non-planar disc-like nanostructures. In this work, we develop a simple method to prepare curved polymer nanodiscs with regular sizes by wetting polymer nanospheres in the nanopores of anodic aluminum oxide (AAO) templates. Polystyrene (PS) nanospheres are first fabricated by using a non-solvent-assisted template wetting method. By annealing the PS nanospheres in the nanopores of AAO templates, curved PS nanodiscs can be produced. The length and morphology of the curved PS nanodiscs can be controlled by the wetting conditions such as the annealing temperatures and times. For some stacked nanospheres, the annealing process can result in the formation of helix-like nanostructures. To demonstrate the universality of this work, this approach is also applied to poly(methyl methacrylate) (PMMA), another common polymer, and similar results are obtained.
虽然已经制备出了具有多种形态的纳米结构，但制备各向异性的二维（2-D）纳米结构，特别是非平面盘状纳米结构仍然是一个巨大的挑战。在这项工作中，我们开发了一种简单的方法，通过在阳极氧化铝（AAO）模板的纳米孔中润湿聚合物纳米球，制备具有规则尺寸的弯曲聚合物纳米盘。首先通过非溶剂辅助模板润湿法制备聚苯乙烯（PS）纳米球。通过在 AAO 模板的纳米孔中对 PS 纳米球进行退火处理，可以制备出弯曲的 PS 纳米盘。弯曲 PS 纳米盘的长度和形态可以通过润湿条件（如退火温度和时间）来控制。对于一些堆叠的纳米球，退火过程可以导致螺旋状纳米结构的形成。为了证明这项工作的通用性，我们还将这种方法应用于另一种常见的聚合物聚甲基丙烯酸甲酯（PMMA），并得到了类似的结果。
