Fig. 7: Thermal and optical properties of CNTF.

a The ∆U across the sample versus the corresponding ΔT to determine the Seebeck coefficient (S) of CNTF. b Absorption spectrum of CNTF.
a The ∆U across the sample versus the corresponding ΔT to determine the Seebeck coefficient (S) of CNTF. b Absorption spectrum of CNTF.