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Reliable Langmuir Blodgett colloidal masks for large area nanostructure realization
Thin Solid Films ( IF 2.0 ) Pub Date : 2020-09-01 , DOI: 10.1016/j.tsf.2020.138195
Madasamy Thangamuthu , Christian Santschi , Olivier J.F. Martin

Abstract The fabrication of highly ordered nanostructures over large areas is key for many technologies and colloidal lithography using the Langmuir Blodgett technique appears a simple and straightforward way of reaching that goal. While this technique has been widely reported in the literature, its straightforward implementation to obtain well-ordered nanostructures over very large areas is far from obvious, since many key technical subtleties are rarely documented. Here, we describe an easily and highly reproducible recipe and detail aspects such as beads preparation, composition of the subphase, beads transfer method, influence of the spreading agent and the barrier compression rate, as well as monolayer transfer to the substrate. A drastic improvement in the polystyrene self-assembly at the air-water interface is observed after removing the common salt and surfactant molecules from commercial polystyrene beads suspensions. Similarly, an electrolyte free water subphase enhances the hexagonal arrangement of the beads and the long-range order. The beads sinking into the bulk of the water is reduced by dispensing the beads using a glass slide and the polystyrene suspension prepared using water and ethanol at 1:1 mitigates repulsive and attractive forces, leading to excellent hexagonal close packed arrangement. By following the recipe shown here, the reader should easily fabricate lattice-like colloidal masks for producing nanostructures over larger areas.

中文翻译:

用于实现大面积纳米结构的可靠 Langmuir Blodgett 胶体掩膜

摘要 在大面积上制造高度有序的纳米结构是许多技术的关键,而使用 Langmuir Blodgett 技术的胶体光刻似乎是实现该目标的一种简单直接的方法。虽然这项技术已在文献中得到广泛报道,但其在非常大的区域内获得有序纳米结构的直接实施远非显而易见,因为许多关键技术细节很少被记录。在这里,我们描述了一个简单且高度可重复的配方和细节方面,例如珠子的制备、亚相的组成、珠子转移方法、扩散剂的影响和屏障压缩率,以及单层转移到基材上。从商业聚苯乙烯珠悬浮液中去除食盐和表面活性剂分子后,观察到空气-水界面处聚苯乙烯自组装的显着改善。类似地,无电解质的水亚相增强了珠子的六边形排列和长程有序。通过使用载玻片分配珠子,可以减少沉入水中的珠子,使用 1:1 的水和乙醇制备的聚苯乙烯悬浮液可以减轻排斥力和吸引力,从而实现出色的六边形密堆积排列。通过遵循此处显示的配方,读者应该可以轻松制造出用于在更大区域上生产纳米结构的晶格状胶体掩模。无电解质的水亚相增强了珠子的六边形排列和长程有序。通过使用载玻片分配珠子,可以减少沉入水中的珠子,使用 1:1 的水和乙醇制备的聚苯乙烯悬浮液可以减轻排斥力和吸引力,从而实现出色的六边形密堆积排列。通过遵循此处显示的配方,读者应该可以轻松制造出用于在更大区域上生产纳米结构的晶格状胶体掩模。无电解质的水亚相增强了珠子的六边形排列和长程有序。通过使用载玻片分配珠子,可以减少沉入水中的珠子,使用 1:1 的水和乙醇制备的聚苯乙烯悬浮液可以减轻排斥力和吸引力,从而实现出色的六边形密堆积排列。通过遵循此处显示的配方,读者应该可以轻松制造出用于在更大区域上生产纳米结构的晶格状胶体掩模。导致优异的六边形密堆积排列。通过遵循此处显示的配方,读者应该可以轻松制造出用于在更大区域上生产纳米结构的晶格状胶体掩模。导致优异的六边形密堆积排列。通过遵循此处显示的配方,读者应该可以轻松制造出用于在更大区域上生产纳米结构的晶格状胶体掩模。
更新日期:2020-09-01
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