Thin gold (Au) films (10 nm) are deposited on different substrates by using a e-beam deposition system. Compared with sapphire and SiO surfaces, longer migration length of the Au adatoms is observed on MoS surfaces, which helps in the formation of a single-crystal Au film on the MoS surface at 200 °C. The results have demonstrated that with the assistance of van der Waals epitaxy growth mode, single-crystal 3D metals can be grown on 2D material surfaces. With the improved crystalline quality and less significant Au grain coalescence on MoS surfaces, sheet resistance 2.9 Ω/sq is obtained for the thin 10 nm Au film at 100 °C, which is the lowest value reported in literature. The highly conductive thin metal film is advantageous for the application of backend interconnects for the electronic devices with reduced line widths.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7468125 | PMC |
| http://dx.doi.org/10.1038/s41598-020-71520-x | DOI Listing |
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