Tunable Fabrication of Two-Dimensional Arrays of Polymer Nanobowls for Biomimic Growth of Amorphous Calcium Carbonate
Tunable Fabrication of Two-Dimensional Arrays of Polymer Nanobowls for Biomimic Growth of Amorphous Calcium Carbonate
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DOI：
10.1002/marc.201200351
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发表时间：
2012-09-26
影响因子：
4.6
通讯作者：
Tung, Chen-Ho
中科院分区：
文献类型：
--
作者：
Ding, Tao;Song, Kai;Tung, Chen-Ho
利用氧等离子体刻蚀技术可以制备聚合物纳米猫头鹰的二维阵列。采用对流自组装法制备了由SiO_2@PMMA颗粒组成的二维胶体晶体。对胶体晶体进行氧等离子体处理，选择性地刻蚀PMMA壳层。由于氧等离子体刻蚀是从上到下逐层进行的，所以首先刻蚀PMMA外壳的顶部，然后将二氧化硅核心暴露在大气中，可以用HF去除大气中的二氧化硅，留下碗状的PMMA外壳形成聚合物纳米猫头鹰的2D阵列。纳米球阵列的尺寸和堆积密度可以通过严格控制的刻蚀时间进行调整。聚合物纳米猫头鹰阵列还可以用作模板，以指导碳酸钙在纳米猫头鹰间隙中的生长。
Two-dimensional arrays of polymer nanobowls can be fabricated by an oxygen plasma etching technique. The 2D colloidal crystals made of SiO2@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.