Berlin 2012 – wissenschaftliches Programm

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DS: Fachverband Dünne Schichten

DS 37: Poster II: Focused electron beam induced processing for the fabrication of nanostructures (focused session, jointly with O); Nanoengineered thin films; Layer properties: electrical, optical, and mechanical properties; Thin film characterization: structure analysis and composition (XRD, TEM, XPS, SIMS, RBS,..); Application of thin films

DS 37.25: Poster

Donnerstag, 29. März 2012, 15:00–17:00, Poster E

Production and structural characterization of nanolayers of LiNbO₃ by wetchemical synthesis — •Doreen Eger, Emanuel Gutmann, Hartmut Stöcker, Erik Mehner, and Dirk-Carl Meyer — TU Bergakademie Freiberg, Inst. für Exp. Physik

There are many known applications of pyroelectrics. Some new ideas, e.g. disinfecting and biocatalytic surfaces, require thin pyroelectric layers on a substrate. A substance with high pyroelectric coefficient is lithium niobate. There, basic investigations of a new method for manufacturing thin layers of lithium niobate are presented.

The thin layers are produced by dip coating of fused silica in a solvens of lithium niobate. Samples with different drawing speed and reaction temperature are manufactured. The resulting layers are characterized by reflected light microscopy (RLM), atomic force microscopy (AFM) and X-ray diffraction (XRD).

It is proven by XRD that the layers consist of lithium niobate. AFM and RLM show that samples with low drawing speed become so thick that clefts are formed.

Therefore, the manufacturing of nanolayers of lithium niobate with dip coating is possible and reasonable. For an optimization of process parameters for deposition of a defined layer thickness more improvement of the method is necessary, e.g. adding a wetting agent or a conditioning step of the substrate.