In a cup of warm water add sugar until it no longer dissolves then add a few spoonfuls more of sugar.

Drop in a small amount of graphite powder into the sugar water mixture. Stir it up well. There should be a thin black film on top of the liquid.

Let it set for a few days.

The sugar crystals will grow on the graphene surface similar to how rock candy grows.

The sugar crystals grow on the bottom of the floating film of graphite and once heavy enough the graphene and sugar crystal wafer will sink. And then the process repeats.

Is this possible with graphite powder in water as a film or is a thin solid piece of graphite necessary for sugar crystal growth?

  • $\begingroup$ It is likely that what you get are graphite-coated sugar crystals. Why do you think this might produce graphene? $\endgroup$ – matt_black Dec 13 '17 at 15:11
  • $\begingroup$ I know that if you add Graphite powder to water a thin film of Graphite appears on surface of water. It likes to group itself centrally in the liquid and on top. Is it necessary to chill the sugar water solution to prevent (or attempt to prevent) shearing ? Maybe instead of simply dumping the Graphite powder into the saturated sugar water you first mix up a lot of Graphite powder with a liquid (not necessarily water) and use an eye dropper to add the Graphite mix to the sugar water? $\endgroup$ – Stevan White Dec 13 '17 at 15:40
  • $\begingroup$ But where do you go beyond a thin film of graphite flakes? Graphene is not the same as graphite flakes. $\endgroup$ – matt_black Dec 13 '17 at 15:42
  • $\begingroup$ When making rock candy the sugar in the saturated sugar water wants to latch onto things submerged in the solution and forms crystals on the object. Since the Graphite sits as a film on top of the liquid the crystals will grow on the nearest surface which is the bottom of the Graphite film. Will the accumulated crystals on the Graphite film cleave the underside and by its weight sink? $\endgroup$ – Stevan White Dec 13 '17 at 15:46
  • $\begingroup$ Also Hydrogen Peroxide 3% (do not use stronger concentrations!) could be later used (or warm water) to dissolve the sugar from the Graphene and Sugar wafer that was produced. $\endgroup$ – Stevan White Dec 13 '17 at 15:48

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