If asked “what kind of graphene do you use in your lab”, most researchers will answer “CVD graphene films”. That is, if you ask members of the “graphene society” group on LinkedIn, like Graphenea boss Jesus de la Fuente did in his poll.
Although the group brings together more than 1,000 graphene researchers and businesses, only 51 members voted in the poll. CVD is currently winning, with 37% of the vote, while a close second position is held by graphene oxide, which received 25%. 17% of the market, according to the poll, belongs to reduced graphene oxide, and 11% of voters selected “others”. Epitaxial graphene on SiC is used by even fewer labs, with a mere 7% of voters selecting that option. One can’t help but wander whether such a low percentage is due to a lack of commercially available product, or simply a lack of market. Surely the people of Graphensic should be able to answer that one, with their entire business relying on this single product. My fear is that the lack of possibility to tune such graphene electrostatically and the rise of other high-quality graphene options, like that on boron nitride, might put a nail in the coffin of epitaxial graphene on SiC.
Note that graphene oxide combined with reduced graphene oxide gets more votes than CVD-grown graphene, which is why most graphene sellers stock both products. It is interesting that “exfoliated” was not on the list, which means it probably holds a large share of the “others” category. I would think that more people use exfoliated graphene in research, because it is after all so easy and cheap to produce, and generally has high quality. Apparently, the quality and price of CVD are just fine for most labs, especially since it allows fabrication of many devices in parallel. This is also good news for epitaxial graphene on SiC, as at the moment this is the only option for large-area very high quality graphene.