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The density of electrons and the electron mobility in the graphene sheet are NI = 5 x 10^12 cm-2 and µ0 = 20,000 cm2/Vs, respectively.
a) Determine the sheet resistance of this graphene film.
b) How many graphene sheets are needed to match the sheet resistance of a 100-nm thick copper sheet (the resistivity of copper is 17 n?*m)? What distance between the graphene sheets is required so that their effective thickness is also 100 nm?

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