Potential Distribution in Functionalized Graphene Devices Probed by Kelvin Probe Force Microscopy

Local voltage drop in a single functionalized graphene sheet characterized by Kelvin probe force microscopy.

We studied the local voltage drop in functionalized graphene sheets of subμm size under external bias conditions by Kelvin probe force microscopy. Using this noninvasive experimental approach, we measured ohmic current-voltage characteristics and an intrinsic conductivity of about 3.7 × 10(5) S/m corresponding to a sheet resistance of 2.7 kΩ/sq under ambient conditions for graphene produced via...

Epitaxial Graphene and Graphene–Based Devices Studied by Electrical Scanning Probe Microscopy

We present local electrical characterization of epitaxial graphene grown on both Siand C-faces of 4H-SiC using Electrostatic Force Microscopy and Kelvin Probe Force Microscopy in ambient conditions and at elevated temperatures. These techniques provide a straightforward identification of graphene domains with various thicknesses on the substrate where topographical determination is hindered by ...

Tetrathiafulvalene-containing polymers for simultaneous non-covalent modification and electronic modulation of MoS2 nanomaterials

Transition metal dichalcogenides (TMDCs) such as MoS2 comprise an important class of 2D semiconductors with numerous interesting electronic and mechanical features. Full utilization of TMDCs in materials and devices, however, necessitates robust functionalization methods. We report welldefined tetrathiafulvalene (TTF)-based polymers, exploiting synthetic routes that overcome challenges previous...

Supporting Information Local transport measurements in Graphene on SiO2 using Kelvin Probe Force Microscopy

Quantitative multichannel NC-AFM data analysis of graphene growth on SiC(0001)

Noncontact atomic force microscopy provides access to several complementary signals, such as topography, damping, and contact potential. The traditional presentation of such data sets in adjacent figures or in colour-coded pseudo-three-dimensional plots gives only a qualitative impression. We introduce two-dimensional histograms for the representation of multichannel NC-AFM data sets in a quant...