Transparent substrates are widely used for optical applications from lenses for personal and sports eyewear to transparent displays and sensors. While these substrates require excellent optical properties, they often suffer from a variety of environmental challenges such as excessive fogging and surface contamination. In this work, it is demonstrated that a wet‐style superhydrophobic coating, which simultaneously exhibits antifogging, antireflective, and self‐cleaning properties, can be prepared by pattern transferring low‐surface‐energy microstructures onto a heterostructured nanoscale thin film comprising polymers and silica nanoparticles. The polymer–silica nanocomposite base layer serves as a hydrophilic reservoir, guiding the water molecules to preferentially condense into this underlying region and suppress reflection, while the low‐surface‐energy microstructure enables contaminants adsorbed on the surface to be easily removed by rinsing with water.

We present a durable superhydrophobic poly(vinylidene fluoride) (PVDF)based nanofibrous membrane to achieve high-performance air filters with reusability. We demonstrate that the additional assembly of silica nanoparticles on an electrospun PVDF nanofibrous membrane and subsequent low-surface-energy treatment enables nonwetting of various probing liquids and the membrane to exhibit a low roll-off angle (∼15°) even for 1 μL of water and artificial saliva droplets. This allows fine dust particles adsorbed on the modified PVDF membrane to be easily removed by washing and suppresses the adhesion of bacterial suspension. Moreover, the modified membrane is compatible with the ethanol sterilization procedure as the membrane exhibits no noticeable alteration in the structure and surface wettability upon spraying or dipping in 75% ethanol solution. Furthermore, by applying these modified PVDF nanofibrous membranes as a skin layer on top of an unmodified analogue, we demonstrate that air filters with high filtration performance, mechanical strength, and reusability can be prepared.

In article number 2002710, Dong‐Pyo Kim, Hyomin Lee, and co‐workers report a wet‐style superhydrophobic coating that exhibits excellent optical properties under a variety of environmental challenges. This coating for optical sensors is prepared by pattern transferring low‐surface‐energy microstructures onto a polymer–silica nanocomposite. The polymer–silica nanocomposite guides water molecules to preferably condense into and suppress reflection, while the low‐surface‐energy microstructure enables the coating to exhibit self‐cleaning properties.

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