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O: Fachverband Oberflächenphysik

O 54: Nanostructured surfaces and thin films

O 54.8: Vortrag

Mittwoch, 11. März 2026, 12:15–12:30, HSZ/0201

Liquid Flame Spray Enables Durable, Transparent, and Super-repellent Silica Coatings — •Suhad Sbeih — German Jordanian University, Amman, Jordan

Developing coatings that are simultaneously transparent, durable, and highly water-repellent remains a long-standing challenge in materials science. In this work, we show that the liquid flame spray (LFS) technique offers a fast and scalable solution. In this process, a silica precursor is combusted to generate nanoparticles that deposit on moving substrates, forming a hierarchical surface texture in a single step. By carefully adjusting the burner-substrate distance, precursor concentration, and coating velocity, we produced coatings that combine optical clarity with extreme water repellency, reaching contact angles above 150^∘ and roll-off angles below 10^∘.

Beyond these surface properties, the coatings exhibited outstanding durability and retained their performance after rinsing, condensation, tape, and scratch tests. The results highlight LFS as a versatile approach for engineering multifunctional surfaces that bring together transparency, robustness, and super-repellency. Such coatings open new opportunities for large-area applications in optics, energy devices, and biomedical technologies.

Keywords: Superhydrophobic Surfaces; Silica Nanoparticles; Liquid Flame Spray; Transparent Coatings; Surface Durability