Device preparation. (a, b) Schematic illustration of the test device without and with herringbone grooves. (c) Raman spectra of monolayered graphene. (d) Fabrication and assembly. (e) SEM images of herringbone grooves. (f) Four different types of device configurations according to the electrode-flow alignment and the presence of herringbone grooves.
Lee et al. Nanoscale Research Letters 2013 8:487 doi:10.1186/1556-276X-8-487