Surface functionalization of few-layer graphene on <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline" id="d1e120" altimg="si50.svg"><mml:mi>?</mml:mi></mml:math>-SiC(001) by Neutral Red dye

Few-layer graphene on ?-SiC(001) functionalized with phenazine dye Neutral Red by means of diazonium chemistry has been studied using X-ray photoelectron spectroscopy, near-edge absorption fine structure, photoemission electron microscopy, scanning tunneling and density functional theory calculations. The experimental data reveal the formation a composite dye/graphene structure large energy gap. molecules in this can be oriented both parallel perpendicular to surface. According spectroscopy theoretical calculations, states different surface areas depends local short-range order molecules’ environment. On other hand, study shows that bottom layers few-layer remain intact, which inherently makes synthesized layered low-dimensional metal/semiconductor heterostructure. In addition, microscopy imaging high homogeneity dye-modified micrometer scale.