It slices, it dices, it's an amazing thermal conductor, it is bendable and now it generates electricity using saltwater. Is there anything graphene can't do?
Here, we show that a voltage of a few millivolts can be produced by moving a droplet of sea water or ionic solution over a strip of monolayer graphene under ambient conditions. Through experiments and density functional theory calculations, we find that a pseudocapacitor is formed at the droplet/graphene interface, which is driven forward by the moving droplet, charging and discharging at the front and rear of the droplet.
Here's a neat video of graphene slicing and dicing ice. 
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