Controlled Self-Assembly of Hexagonal Nanoparticle Patterns on Nanotopographies

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• 作者：Laith F. Kadem ; Constanze Lamprecht ; Julia Purtov ; Christine Selhuber-Unkel
• 刊名：Langmuir
• 出版年：2015
• 出版时间：September 1, 2015
• 年：2015
• 卷：31
• 期：34
• 页码：9261-9265
• 全文大小：295K
• ISSN：1520-5827

文摘

Diblock copolymer micelle nanolithography (BCML) is a versatile and efficient method to cover large surface areas with hexagonally ordered arrays of metal nanoparticles, in which the nanoparticles are equally spaced. However, this method falls short of providing a controlled allocation of such regular nanoparticle arrays with specific spacing into micropatterns. We present here a quick and high-throughput method to generate quasi-hexagonal nanoparticle structures with well-defined interparticle spacing on segments of nanotopographic Si substrates. The topographic height of these segments plays a dominant role in dictating the spacing between the gold nanoparticles, as the nanoparticle arrangement is controlled by immersion forces and by their self-assembly within the segments. Our novel strategy of employing a single-step BCML routine is a highly promising method for the fabrication of regular gold nanopatterns in micropatterns for a wide range of applications.