I've obtained it by micromechanical cleavage (the size of the samples are around micrometers) and it's deposited on a substrate. I might measure the conductivity using either four probe method or a SEM?
I read one research paper about that. They used micropipette sensor with laser point heating source. The value obtained was 2868 ± 932 W/m °C. I attached a good reference.
In terms of electrical measurements using 4-point probe the sample-specific characteristics are intimately related to technical constraints such as the probe geometry and size of the sample. Based on the size of your samples I think- Nano-4P probe STM or Two-probe STM will be the best for experiments and especially at the atomic level.
Jackelyne Lisset Medina, which method you have used to find out the conductivity of graphene? Can you provide some insight?
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