The porous and superhydrophobic shell of a liquid marble prevents contact of its liquid core with outside surfaces, but allows gas transport. Liquid marble can therefore be used to sense gas or emit gas. Liquid marbles loaded with different indicators can simultaneously sense different gases via different mechanisms.

A liquid marble micro‐ bioreactor is used to conduct blood typing as a typical biological assay. This study portrays the potential of using such microreactors for biochemical and biological analysis.

The confined internal space of a liquid marble, as well as its porous and non-adhesive shell, offers an attractive application possibility - accommodating living cells inside liquid marbles. Cancer cells in suspension may aggregate to form three dimensional structures, also known as cancer cell spheroids (CCS). In this study, CCS formation inside liquid marble is investigated. This liquid marble application opens significant and novel avenues for biomedical applications and cancer research.

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