**Preface to "Fluid Interfaces"**

Fluid interfaces are ubiquitous in science and technology, playing a main role in different aspects of industry, nature, or even life. This makes it necessary to understand the most fundamental physicochemical bases underlying the behavior of such interfaces. However, this is tricky, and makes it necessary to explore the impact of molecular and supramolecular species on the flows occurring within the interfacial region and the thickness of the interface. Furthermore, the broken symmetry associated with the formation of a fluid interface can be used as a platform for the assembly of innovative materials with reduced dimensionality, which may have impacts in food science, cosmetics, biology, oil recovery, electronic, drug delivery, detergency, or tissue engineering. This has made of the study of fluid interfaces a multidisciplinary challenge involving researchers from different areas of chemistry, physics, pharmacy, biophysics, medicine, engineering, and materials science.

The papers included in this book present a broad perspective of the current trends on the study of fluid interfaces.

> **Eduardo Guzm´an** *Editor*
