Porous liquid marble shell offers possibilities for gas detection and gas reactions

Abstract

The hydrophobic shell of a liquid marble prevents direct contact of the liquid core of the marble with any condensed phases (i.e. solid or liquid) outside the marble, but allows gas and vapour to diffuse across the shell. This property of a liquid marble naturally enables it to discriminately absorb or emit gaseous and vaporous compounds across its shell while denying contact or transport of liquids. Liquid marbles can, therefore, be used to form micro-gas reactors for gas detection application when loaded with an indicator solution. Liquid marble can also be used as a gas emitter; the relatively thin liquid marble shell enables the gas dissolved in the liquid marble core to be emitted to th..