Intrinsic Tunneling Characteristics of Aryl Alkane Monolayers Sandwiched Between Single-Layer Graphene Electrodes
In this study, we report on charge transport through aryl alkane monolayers sandwiched between single-layer graphene (SLG) electrodes. Raman spectroscopy identified the chemically grafting of aryl diazonium compounds onto bottom SLG electrodes. Current densities of three different aryl
alkane monolayers were exponentially deceased with a correct decay coefficient (β) as the length of a tunneling barrier increased. Transition voltage measurements for variable lengths of alkyl chains showed that the SLG/monolayer/SLG arrangement provides the formation of a valid
tunneling junction to observe intrinsic charge transport properties of the incorporated molecules. This study demonstrated the possible application of the SLG electrodes to the test beds of molecular junctions.
Keywords: GRAPHENE; MOLECULAR JUNCTION; RAMAN SPECTROSCOPY; TRANSITION VOLTAGE SPECTROSCOPY; TUNNELING
Document Type: Research Article
Publication date: 01 April 2020
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