Ah yes, the graphene. Material so abundant that Wikipedia's top right corner still contains only CGI render.
Like this? It's difficult to take a picture of an one atom thick material. You can also easily produce it at home if you'd like.
Or if you'd like to produce larger quantities, it seems like that's also doable at home with just a few hundred dollars of equipment: https://www.youtube.com/watch?v=3hHoL77QDkg
this is a much better method, shorter, and the author is less misleading on the claims of what they are actually making https://www.youtube.com/watch?v=4Et8FEbCuCs
At least for a while, the approach was a blind search - with huge funding available to anyone claiming to be researching graphene applications, people were doing all kind of daft things with it. I don’t doubt that we’d be printing the stuff in metre-wide sheets by now if we hadn’t thrown so much money at trying to use it for everything from tuneable transistors (with the slight issue that mobility is inversely proportional to the bandgap) to throwing it into every conceivable medical application to see what sticks (with the slight caveat that every such paper I read at the time was actually talking about 50+ layer graphene, or as I’d call it “an actual pencil”).
I hope it’s in a better state now.