Probing Single and Bilayer Graphene Field Effect Transistors by Raman Spectroscopy - Graphene and Its Fascinating Attributes - page 115

(c)

(a) (b)

V G

G G

Φ

C

G

SLG

Φ

V TG

TG

E
e

F

C

Q

S

SLG

Fig. 8. (a) Geometrical capacitance and quantum capacitance are in series with V G .(b)
V TG is the voltage applied between the gate and source. Φ is the electrostatic potential
drop and E F is the Fermi energy shift. (c) Doping as a function of V TG .

(a)

(b)

(c)

(d)

Fig. 9. (a) Raman spectra of PEO+LiClO 4 mixture. (b) Raman spectra of graphene
before pouring the polymer electrolyte. (c) Raman spectra at V TG =0.0Vand(d)
V TG =V D =0.6V. P1, P2 and P3 are the polymer peaks. 50,55