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首页> 外文期刊>Polymers for advanced technologies >Two-dimensional non-close-packed arrays of nanoparticles via core-shell nanospheres and reactive ion etching
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Two-dimensional non-close-packed arrays of nanoparticles via core-shell nanospheres and reactive ion etching

机译：通过核壳纳米球和反应性离子刻蚀的纳米颗粒二维非紧密堆积阵列

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摘要

Nanosized PTFE/polystyrene core-shell particles were prepared by seed emulsion polymerization technique starting from PTFE seeds of 20 nm. At the end of the reaction, no residual PTFE nor secondary nucleation was observed and by appropriately choosing the ratio between the monomer and the PTFE seed it was possible to obtain particles, with predetermined size in the range 60-100 nm, featuring an extremely narrow size distribution. These particles were successfully employed as building blocks for the preparation of large scale nanosized monolayers through the floating technique. Reactive ion etching was further applied to modulate the size characteristics of the resulting 2D ordered nanostructure. Although for relatively short RIE times a peculiar continuous morphology was observed in which the particles are interconnected through thin arms, on further increasing the RIE time a well-organized 2D arrangement of particles with size of about 30nm was obtained. Considering the shell as an expendable ordering and spacing tool, the use of core-shell nanospheres allows a wide variety of controlled morphologies to be designed and prepared thus opening new perspectives for nanostructure fabrication processes through nanosphere lithography (NSL).
机译：通过种子乳液聚合技术从20 nm的PTFE种子开始制备纳米级PTFE /聚苯乙烯核壳颗粒。在反应结束时，未观察到残留的PTFE或二次成核，并且通过适当选择单体与PTFE种子之间的比例，可以得到预定尺寸在60-100nm范围内，非常窄的颗粒。大小分布。这些颗粒已成功地用作通过漂浮技术制备大规模纳米单层的基础材料。进一步应用反应性离子蚀刻来调节所得二维有序纳米结构的尺寸特征。尽管对于相对较短的RIE时间，观察到了一种特殊的连续形态，其中颗粒通过细臂相互连接，但随着RIE时间的进一步增加，可以获得尺寸约30nm的组织良好的2D颗粒排列。将壳视为消耗性的排序和间隔工具，核壳纳米球的使用允许设计和制备各种各样的受控形态，从而为通过纳米球光刻（NSL）的纳米结构制造工艺开辟了新的前景。

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