Beijing National Laboratory for Molecular Sciences, Chinese Academy of Sciences, People's Republic of China.
Macromol Rapid Commun. 2012 Sep 26;33(18):1562-7. doi: 10.1002/marc.201200351. Epub 2012 Jul 2.
Two-dimensional arrays of polymer nanobowls can be fabricated by an oxygen plasma etching technique. The 2D colloidal crystals made of SiO(2) @PMMA particles are fabricated by a convective self-assembly method. The oxygen plasma treatment is applied to the colloidal crystals to selectively etch the PMMA shells. Because the oxygen plasma etching proceeds in a layer-by-layer manner from top to bottom, the top parts of the PMMA shells are etched first, and the silica cores are exposed to the atmosphere, which can be removed with HF, leaving the bowl-shaped PMMA shells to form 2D arrays of polymer nanobowls. The size and packing density of the nanobowl arrays can be tuned with tightly controlled etching time. The polymer nanobowl arrays can also serve as a template to direct the growth of calcium carbonate within the interstice of the nanobowls.
二维聚合物纳米碗阵列可以通过氧等离子体刻蚀技术来制备。通过对流自组装方法制备由 SiO2@PMMA 粒子组成的 2D 胶体晶体。将胶体晶体进行氧等离子体处理，选择性地刻蚀 PMMA 壳。由于氧等离子体刻蚀从顶到底逐层进行，因此 PMMA 壳的顶部首先被刻蚀，而二氧化硅核暴露于大气中，可以用 HF 去除，留下碗状的 PMMA 壳，形成二维聚合物纳米碗阵列。纳米碗阵列的尺寸和填充密度可以通过严格控制刻蚀时间来调节。聚合物纳米碗阵列还可以作为模板，在纳米碗的间隙内引导碳酸钙的生长。
