Graphene as an Open-Source Material
techcrunch.com
techcrunch.com
If the author is suggesting that amateurs do interesting work with graphene we run into a couple problems. It's difficult for amateurs to obtain even basic chemical reagents and labware. Most chemical suppliers won't even sell to amateurs. Not to mention that some of these chemicals involved can be pretty nasty. There's also the issue of all the equipment needed to evaluate stuff made with graphene. Microscopes and mechanical testers can be pretty expensive.
That being said graphene suffers from similar problems to other nanomaterials. While we can obtain high strength, we can only do so with close to atomically perfect sheets. We still don't have a good way to make large atomically perfect materials, so we can only achieve these high strengths with microscopic flakes of graphene. In addition, the roll to roll process they mentioned is still going to be pretty expensive. It's slow and energy intensive making it difficult to produce by the kilogram, much less the ton. It's also been noted that graphene really doesn't have much of a killer app[0], with most graphene applications being only marginally better than alternatives.
Now much of the hype around graphene came from it's electronic properties. The big attraction was that one could do many of the things we wanted to do with carbon nanotubes, that is making smaller faster transistors, using standard CMOS processing equipment[1]. The problem is that its still difficult to make graphene exhibit a band gap, which is important for making computer chips so that we can make transistors which actually turn off.
[0] https://www.nature.com/news/graphene-booms-in-factories-but-... [1] https://arxiv.org/pdf/0911.4685.pdf
I don't think there is any particular "secret sauce" in the technique I was using to make the graphene - I was using Modified Hummer's method (MH method) to make graphene-oxide and then reductive precipitation (RP) - it's well covered by the literature. There is even a wikipedia article on it.(https://en.wikipedia.org/wiki/Hummers%27_method). I don't think anything would really stop a dedicated amateur.
I agree with you a lot of the difficulty is sourcing the chemicals and especially the equipment (sonicator, centrifuge etc) which makes it much more suited for a laboratory than amateur experimentation. Also agree it's slow and time consuming to produce at least using method I was.
It takes a lot of different people and perspectives to make something happen at scale. Keep these important ideas flowing and open!
Prompted me to buy some graphoil, sodium sulfate, and ultrasound sonication bath and follow along: https://www.youtube.com/watch?v=hFUOsZ0LSkQ
This seems to imply that graphene does occasionally occur in nature? Does anyone know under what situations this happens?