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首页> 外文期刊>Current Science: A Fortnightly Journal of Research >Taming of self-organization in highly confined soft matter to sub-100 nm scales: nanolens-arrays by spinodal instability of thin polymer films for high-resolution optical imaging
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Taming of self-organization in highly confined soft matter to sub-100 nm scales: nanolens-arrays by spinodal instability of thin polymer films for high-resolution optical imaging

机译：将高度受限的软物质中的自组织驯化到100纳米以下：通过旋节不稳定性形成的薄聚合物膜的旋节线不稳定性的纳米透镜阵列，用于高分辨率光学成像

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摘要

We present a mini review of the recent progress in the fabrication of nanolenses and their use for high-resolution optical imaging beyond the diffraction limit. Nanolenses break the diffraction limit by capturing near-field evanescent waves and refocusing them in the far-field image plane. The focus of this article is on our recent work on fabrication of nanolens and ordered lens arrays by a combination of the top-down and self-organization in unstable thin polymer films. Highly confined, thin (<50 nm) liquid polymer films spontaneously transform into micro-scale patterns of droplets by a spinodal instability leading to dewetting. The lateral length scales of these self-organized structures in air are limited by the weak van der Waals destabilizing force and a strong surface tension-induced stabilization. Limitations on slow dewetting kinetics and relatively large (>1 mu m) length scales can be overcome by dewetting induced under an optimal mix of a non-solvent (water) and a good solvent, which reduces the interfacial tension without a concurrent solubilization of the polymer. This room temperature technique reduces both the time and the length scales of self-organized structures by over one order of magnitude. Further, directed dewetting combined with physico-chemically patterned substrates and films by e-beam, photolithography, laser ablation and nanoimprint lithography techniques can be used for fabrication of ordered nanostructures such as arrays of nanolenses.
机译：我们对纳米透镜的制造及其在衍射极限之外用于高分辨率光学成像的最新进展进行了简要回顾。纳米透镜通过捕获近场e逝波并将其重新聚焦在远场像面上来打破衍射极限。本文的重点是我们最近在不稳定的聚合物薄膜中通过自顶向下和自组织的组合来制造纳米透镜和有序透镜阵列的工作。高度受限的，薄的（<50 nm）液态聚合物薄膜由于旋节线的不稳定性而自发地转变为液滴的微尺度图案，从而导致去湿。这些自组织结构在空气中的横向长度尺度受到范德华弱稳定力和表面张力引起的强稳定作用的限制。通过在非溶剂（水）和良好溶剂的最佳混合物下诱导的去湿，可以克服缓慢的去湿动力学和相对较大的长度尺度（> 1μm）的局限性，这可以降低界面张力，而不会同时溶解溶剂。聚合物。这种室温技术将自组织结构的时间和长度尺度都减少了一个数量级。此外，通过电子束，光刻，激光烧蚀和纳米压印光刻技术与物理化学图案化的衬底和薄膜相结合的定向去湿可用于制造有序的纳米结构，例如纳米透镜阵列。

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