While cutting graphene sponge with a laser, they noticed the light propelled the material forwards. That was odd, because while…

“

While cutting graphene sponge with a laser, they noticed the light propelled the material forwards. That was odd, because while lasers have been used to shove single molecules around, the sponge was a few centimetres across so should be too large to move.

The team placed pieces of graphene sponge in a vacuum and shot them with lasers of different wavelength and intensity. They were able to push sponge pieces upwards by as much as 40 centimetres. They even got the graphene to move by focusing ordinary sunlight on it with a lens.

–Spacecraft built from graphene could run on nothing but sunlight (viaiamdanw)