I`ve exfoliated graphene with less amount of oxide groups.
However, after few days, it has been sedimented in DI water.
I thought that it has been sedimented because of less oxide group and large size.
Is it well dispersed in DI, even though it has few oxide groups with small size and few layers?
I want to know that If it is small and few layer, is it well dispersed ?
Go thorugh this article which opens up a whole new vista on how to disperse graphene.
http://pubs.rsc.org/en/content/articlepdf/2013/cc/c3cc46457a
Check Coleman papers, he gives details of graphene dispersion in various solvents with and without surfactants. HTH
You should try extreme cavitation with copper/nickel surfaces. Contact Gary Powell. 617 953 2647
You can use naphtele sulphonate as a dispersing agent. Also it is not a surfactant.
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