Engineering the fluid interface such as the gas–liquid interface is of great significance for solvent processing applications including functional material assembly, inkjet printing, and high‐performance device fabrication. However, precisely controlling the fluid interface remains a great challenge owing to its flexibility and fluidity. Here, a general method to manipulate the fluid interface for fluid patterning using micropillars in the microchannel is reported. The principle of fluid patterning for immiscible fluid pairs including air, water, and oils is proposed. This understanding enables the preparation of programmable multiphase fluid patterns and assembly of multilayer functional materials to fabricate micro‐optoelectronic devices. This general strategy of fluid patterning provides a promising platform to study the fundamental processes occurring on the fluid interface, and benefits applications in many subjects, such as microfluidics, microbiology, chemical analysis and detection, material synthesis and assembly, device fabrication, etc.

中文翻译：

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流体构图的通用方法及其在微器件制造中的应用

对诸如气体-液体界面之类的流体界面进行工程设计对于溶剂处理应用（包括功能材料组装，喷墨打印和高性能设备制造）具有重要意义。然而，由于其柔性和流动性，精确地控制流体界面仍然是巨大的挑战。在此，报道了使用微通道中的微柱来操纵流体界面以进行流体图案化的一般方法。提出了对不混溶的流体对（包括空气，水和油）进行流体构图的原理。这种理解使得能够准备可编程的多相流体模式，以及组装多层功能材料以制造微光电器件。