Berlin 2018 – scientific programme
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DS: Fachverband Dünne Schichten
DS 31: Poster Session II
DS 31.13: Poster
Thursday, March 15, 2018, 11:15–13:15, Poster F
Electrically conductive long term stable ultrathin Gallium/Gallium(hydr)oxide layers — •Sebastian Runde1, Heiko Ahrens1, Frank Lawrenz1, Amal Sebastian1, Stephan Block2, and Christiane A. Helm1 — 1Inst. f. Physics, Greifswald University, Germany — 2Dept. for Biochemistry and Chemistry, Free University of Berlin, Germany
Single Gallium/Gallium(hydr)oxide Ga/GaOxHy layers were prepared by induced break-up after forced wetting. Multilayers were formed by repeating the deposition procedure. X-ray reflectivity shows a multilayer structure. The repeat unit consists of a Ga layer covered by a GaOxHy layer (thickness 2.9 nm). The multilayer thickness is proportional to the number of deposited layers. The multilayer-air roughness may be smaller than the substrate-multilayer roughness, which is attributed to the large surface tension of Gallium. The electric conductivity of a multilayer follows Ohm*s law. The sheet resistance decreases with the number of deposited layers. We suggest that induced break-up after forced wetting is an environmentally friendly way to produce large ultrathin conductive layers from fluid metals.