Bespoke periodic topography in hard polymer films by infrared radiation-assisted evaporative lithography
Bespoke periodic topography in hard polymer films by infrared radiation-assisted evaporative lithography
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DOI：
10.1039/c1sm06527k
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发表时间：
2011-01-01
期刊：
影响因子：
3.4
通讯作者：
Keddie, Joseph L.
中科院分区：
文献类型：
--
作者：
Georgiadis, Argyrios;Routh, Alexander F.;Keddie, Joseph L.
具有周期性形貌图案的聚合物涂层在毫米长度范围内重复，是由胶体颗粒水分散体的侧向流动形成的。该流动是由通过荫罩的红外辐射加热产生的湿膜表面蒸发速率差异驱动的。这种新工艺称为红外辐射辅助蒸发光刻 (IRAEL)，它将红外粒子烧结与蒸发光刻的概念相结合。我们表明，表面特征的高度随着几个关键参数的增加而增加：薄膜的初始厚度、颗粒的体积分数和图案的节距。通过使用几何和粒子传输模型来解释结果。图案涂层可以充当“可涂漆”微透镜阵列，适用于几乎任何表面。与创建纹理涂层的现有方法相比，IRAEL 更简单、价格低廉，能够创建各种定制表面，并且无需事先准备即可适用于几乎任何基材。
Polymer coatings with periodic topographic patterns, repeating over millimetre length scales, are created from lateral flows in an aqueous dispersion of colloidal particles. The flow is driven by differences in evaporation rate across the wet film surface created by IR radiative heating through a shadow mask. This new process, which we call IR radiation-assisted evaporative lithography (IRAEL), combines IR particle sintering with the concept of evaporative lithography. We show that the height of the surface features increases with an increase in several key parameters: the initial thickness of the film, the volume fraction of particles, and the pitch of the pattern. The results are interpreted by using models of geometry and particle transport. The patterned coatings can function as "paintable" microlens arrays, applicable to nearly any surface. Compared with existing methods for creating textured coatings, IRAEL is simpler, inexpensive, able to create a wide variety of bespoke surfaces, and applicable to nearly any substrate without prior preparation.