Electronic transport properties of graphene nanoribbon arrays fabricated by unzipping aligned nanotubes

We report on the electronic transport of graphene nanoribbon (GNR) arrays fabricated by a chemical unzipping of well-aligned single-walled carbon nanotubes. The high quality of narrow GNRs is implied by the existence of high-field current saturation and the relatively low intensity of disorder peak in parallel polarized Raman spectra. We find the zero-bias anomaly and the power-law behavior in differential conductance as a function of bias voltage and temperature in the one-dimensional GNRs, which can be well described as Luttinger liquid. Furthermore, this Luttinger-liquid behavior can be tuned by changing the gate voltage.