In elemental analysis of graphene somebody reported the % of carbon 84%,oxygen 10% some people reported carbon > 90%. actually which one is the good composition for pure graphene.
100% Carbon is the best.. :) ... but this is seldom achieved in chemically derived graphene..
Khan the graphene oxide itself have carbon, oxygen composition 55%, 45% ?
Thanks for your query.
Normally, purest graphene should have 100% carbon which provides those exceptional properties as justified by Andre Geim et al in 2010.
Actually, It depends on which is target property of graphene you want to explore. Yes, the decrease in C to O ratio surely decrease at least di-electrical conductivity due to presence of oxygen.
Thanks, Vineet
graphene is 100% carbon, however, you can modulate the electrical properties with the degree of oxidation. Usually, when you increase the oxygen contents the electrical resistance increases. Also, when incorporating oxygen such as in GO you can modulate the band gap.
Yes absolutely caballero and Vineet. Once we are saying graphene means it is 100% carbon only but regarding C/O ratio it is always better to have more C/O ratio as it will directly govern the properties. Pertaining to the best composition it depends upon the target of use. if you need more condutivity then you need to have more sp2 bonded carbon atoms in the sheet rather than oxygen.
The higher the C/O ratio, the better, because you are approaching graphene structure. The problem is that you lose in solubility. I would suggest to study Pumera et al publication ''Graphenes prepared by Staudenmaier, Hofmann and Hummers methods with consequent thermal exfoliation exhibit very different electrochemical
properties''. Contact me if you don't have access
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