Slippery liquid-infused porous surfaces (SLIPS) show remarkable liquid repellency, making them useful for many coating applications. The outstanding repellency of SLIPS comes from a lubricant layer stabilized within and at the surface of a porous template. The stability of this lubricant layer is key for SLIPS to exhibit their unique functionality. The lubricant layer, however, is depleted over time, causing degradation of liquid repellency. The formation of wetting ridges surrounding liquid droplets on the surface of SLIPS is one of the primary sources of lubricant depletion. Here, we present the fundamental understanding and characteristics of wetting ridges and highlight the latest developments that enable the detailed investigation and suppression of wetting ridge formation on SLIPS. In addition, we offer our perspectives on new and exciting directions for SLIPS.

中文翻译：

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光滑的注入液体的多孔表面上的润湿脊

光滑的液体注入多孔表面 (SLIPS) 显示出卓越的液体排斥性，使其可用于许多涂层应用。SLIPS 出色的排斥性来自于在多孔模板内部和表面稳定的润滑层。该润滑层的稳定性是 SLIPS 发挥其独特功能的关键。然而，润滑层会随着时间的流逝而耗尽，导致液体排斥性降低。在 SLIPS 表面围绕液滴形成润湿脊是润滑剂耗尽的主要来源之一。在这里，我们介绍了润湿脊的基本理解和特征，并强调了能够详细研究和抑制 SLIPS 上润湿脊形成的最新进展。此外，