Sub-terahertz frequency-domain spectroscopy reveals single-grain mobility and scatter influence of large-area graphene.

Cervetti, Christian; Heintze, Eric; Gorshunov, Boris; Zhukova, Elena; Lobanov, Svyatoslav; Hoyer, Alexander; Burghard, Marko; Kern, Klaus et al. · Adv Mater · 2015

basic_science · Level V

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Abstract

The response of individual domains in wafer-sized chemical vapor deposition graphene is measured by contactless sub-terahertz interferometry, observing the intrinsic optical conductance and reaching very high mobility values. It is shown that charged scatterers limit the mobility, validating previous theoretical predictions, and sub-terahertz quality assessment is demonstrated, as necessary for large-scale applications in touchscreens, as well as wearable and optoelectronic devices.

Medical subject headings