THz response of graphite nanoplatelets

Abstract

The room-temperature THz spectrum of graphite nanoplatelets shows a free carrier absorption at zero frequency with an electronic scattering rate of 175 cm -1 (3.3 x 10 13 rad/s) and plasma frequency of 1675 cm -1 . The lack of a major change in Drude plasma frequency down to 4.2 K implies any band gaps in graphite nanoplatelets are less than 1 meV.