Researchers from Korea and the Netherlands discovered a new type of ice that forms between graphene oxide layers.
The researchers stacked graphene oxide layers and then passed water through the material (which acts as a membrane) and froze it. This created a single-layer ice. The researchers then used more water and froze it again, which resulted in unique bi-layer ice.
The new ice layers actually slide against each other unlike normal ice. This is because water goes through the GO membrane in a special way which allows it to freeze into a new kind of crystal shape.
It's possible that this new discovery could lead to the development of new separating membrane types. It may lead to new water-based catalysts, too.