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A liquid marble is a liquid droplet encapsulated in a hydrophobic powder that adheres to the liquid surface. Liquid marbles preparation is very simple – a small amount of liquid is rolled on the layer of hydrophobic powder consisting of nano- or micro particles, which spread spontaneously at the interface liquid / air. This process results in a liquid marble formation that has some of the properties of a liquid droplet and at the same time it behaves as a soft solid. Liquid marbles are an alternative to superhydrophobic surfaces, because particles preventing the liquid to wet and contaminate the carrier surface which can be a solid or liquid surface. The present work focuses on the description of basic properties of liquid marbles and also gives an overview of the possible applications of liquid marbles, e.g. for transport of small volumes of liquids or powders in microfluidics, for the detection of gases or water contamination or as (bio)microreactors.
