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首页> 外文期刊>Advanced Materials >Anisotropic Nanoscale Wrinkling in Solid-State Substrates
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Anisotropic Nanoscale Wrinkling in Solid-State Substrates

机译：固态基板中的各向异性纳米起皱

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摘要

Pattern formation induced by wrinkling is a very common phenomenon exhibited in soft-matter substrates. In all these systems, wrinkles develop in the presence of compressively stressed thin films lying on compliant substrates. Here, the controlled growth of self-organized nanopatterns exploiting a wrinkling instability on a solid-state substrate is demonstrated. Soda-lime glasses are modified in the surface layers by a defocused ion beam, which triggers the formation of a compressively stressed surface layer deprived of alkali ions. When the substrate is heated up near its glass transition temperature, the wrinkling instability boosts the growth rate of the pattern by about two orders of magnitude. High-aspect-ratio anisotropic ripples bound by faceted ridges are thus formed, which represent an optimal template for guiding the growth of large-area arrays of functional nanostructures. The engineering over large square centimeter areas of quasi-1D arrays of Au nanostripe dimers endowed with tunable plasmonic response, strong optical dichroism, and high electrical conductivity is demonstrated. These peculiar functionalities allow these large-area substrates to be exploited as active metamaterials in nanophotonics, biosensing, and optoelectronics.
机译：由起皱引起的图案形成是在软物质基底中表现出的非常普遍的现象。在所有这些系统中，在顺应性基材上放置压缩应力薄膜时都会产生皱纹。在这里，展示了利用固态衬底上的起皱不稳定性的自组织纳米图案的受控生长。钠钙玻璃在表面层中通过散焦的离子束进行改性，这触发了缺乏碱离子的压缩应力表面层的形成。当基板被加热到接近其玻璃化转变温度时，起皱的不稳定性将图案的生长速率提高了大约两个数量级。这样就形成了由刻面脊约束的高纵横比各向异性波纹，它代表了指导功能纳米结构大面积阵列生长的最佳模板。展示了具有可调等离子体响应，强二色性和高电导率的Au纳米带二聚体的准1D阵列的大平方厘米面积的工程设计。这些独特的功能使这些大面积基板可以用作纳米光子学，生物传感和光电子学中的活性超材料。

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