Glen McHale*, Gary G. Wells and Rodrigo Ledesma-Aguilar,
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Surfaces Slippery to Liquids: Wettability, Adhesion, and Contact Line Friction
Ensuring surfaces stay dry and clean and resistant to icing and fouling is a pervasive challenge. Historically, strategies to achieve this, such as superhydrophobicity, have focused on surface wettability. Recently, research has shifted to minimizing surface heterogeneity using slippery liquid-infused porous and slippery covalently attached liquid-like surfaces. Here, we discuss a conceptual approach to contact line friction that provides design principles underlying practical surfaces. This brings an understanding of how contact angles, on both solid and liquid-film surfaces, combined with contact angle hysteresis can predict contact line friction. This leads to reconsideration of the long-accepted wettability “spectrum”. Finally, we speculate on opportunities for new coatings free from poly- and perfluoroalkyl substances to address the societal and environmental challenges of “Forever Chemicals”.
期刊介绍:
Langmuir is an interdisciplinary journal publishing articles in the following subject categories:
Colloids: surfactants and self-assembly, dispersions, emulsions, foams
Interfaces: adsorption, reactions, films, forces
Biological Interfaces: biocolloids, biomolecular and biomimetic materials
Materials: nano- and mesostructured materials, polymers, gels, liquid crystals
Electrochemistry: interfacial charge transfer, charge transport, electrocatalysis, electrokinetic phenomena, bioelectrochemistry
Devices and Applications: sensors, fluidics, patterning, catalysis, photonic crystals
However, when high-impact, original work is submitted that does not fit within the above categories, decisions to accept or decline such papers will be based on one criteria: What Would Irving Do?
Langmuir ranks #2 in citations out of 136 journals in the category of Physical Chemistry with 113,157 total citations. The journal received an Impact Factor of 4.384*.
This journal is also indexed in the categories of Materials Science (ranked #1) and Multidisciplinary Chemistry (ranked #5).