Dresden 2017 – scientific programme
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O: Fachverband Oberflächenphysik
O 110: Molecular Films: Morphology, Electronics, Photovoltaics
O 110.7: Talk
Friday, March 24, 2017, 12:15–12:30, GER 38
All-Carbon Nanocapacitors from Graphene–Carbon Nanomembrane–Graphene Heterostructures — •Emanuel Marschewski1, Xianghui Zhang1, Thomas Weimann2, Paul Penner1, Daniel Emmrich1, Peter Hinze2, and Armin Gölzhäuser1 — 1Fakultät für Physik, Universität Bielefeld, 33615 Bielefeld — 2Physikalisch-Technische Bundesanstalt, 38116 Braunschweig
We demonstrated the fabrication and characterization of all-carbon capacitors (ACCs) composed of multilayer stacks of dielectric carbon nanomembranes (CNMs) that are sandwiched between two CVD graphene sheets that act as conducting electrodes. CNMs were formed from a series of phenylthiol homologues, i.e. biphenylthiol (BPT), p-terphenylthiol (TPT), and p-quaterphenylthiol (QPT). Two-layer and six-layer CNMs were used as the dielectric layer between the top and bottom trilayer graphene electrodes.The junction areas of the nanocapacitors range from 1 to 2500 µ m2. The frequency response of nanocapacitors has been measured with an LCR meter and the impedance spectra could be analyzed with a simple equivalent circuit. The dielectric constant of oligophenyl-based multilayer CNMs could be determined from the junction capacitance. These results suggest that the combination of graphene and CNMs as well as other 2D materials in nanoscale functional devices may provide a promising approach toward further development of molecular electronics devices.