Physical Supercritical Fluid Deposition: Patterning Solution Processable Materials on Curved and Flexible Surfaces,ACS Applied Materials & Interfaces

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Physical Supercritical Fluid Deposition: Patterning Solution Processable Materials on Curved and Flexible Surfaces
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2020-04-01 , DOI: 10.1021/acsami.0c00724
Nastaran Yousefi ₁ , Janneus J. Maala ₁ , Mikayla Louie ₁ , Jacob Storback ₁ , Loren G. Kaake ₁

Affiliation

We provide the initial demonstration of a general thin film deposition technique that leverages the unique solubility properties of supercritical fluids. The technique is the solution-phase analogue of physical vapor deposition and allows thin films of a semiconducting polymer to be grown without the need for in situ chemical reactions. Film growth is approximately linear with time, indicating that film thickness can be controlled in a straightforward manner by varying the time of deposition. To further demonstrate the flexibility of the technique, we demonstrate precise control over the location of material deposition using a combination of photolithography and resistive heating. The potential for scalable manufacturing is demonstrated by use of a master to control deposition onto a flexible polymer film. Finally, we demonstrate a unique deposition capability of this technique by depositing patterns onto the curved interior of a hemisphere made from a silicone elastomer. This capability is not possible with any printing or line-of-sight deposition technique. More generally, the ability to control the deposition of solution processed materials with high accuracy provides the long sought after bridge between top-down and bottom-up self-assembly.

中文翻译：

物理超临界流体沉积：在弯曲和柔性表面上构图解决方案可加工材料

我们提供了利用超临界流体独特的溶解度特性的一般薄膜沉积技术的初步演示。该技术是物理气相沉积的溶液相模拟，可在不需要原位化学反应的情况下生长半导体聚合物的薄膜。膜的生长与时间大致成线性关系，表明可以通过改变沉积时间以直接的方式控制膜的厚度。为了进一步展示该技术的灵活性，我们展示了使用光刻和电阻加热相结合的材料沉积位置的精确控制。通过使用母版控制在柔性聚合物膜上的沉积，证明了可扩展制造的潜力。最后，我们通过将图案沉积到由有机硅弹性体制成的半球的弯曲内部上，证明了该技术的独特沉积能力。使用任何印刷或视线沉积技术都无法实现此功能。更一般地，以高精度控制溶液处理的材料的沉积的能力提供了自上而下和自下而上的自组装之间的长期追求的桥梁。

更新日期：2020-04-01

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