EE – TechConnect Briefs

Alkoxide-based precursors for direct drawing of metal oxide micro- and nanofibres

Tätte T., Hussainov M., Kelp G., Rand R., Gurauskis J., Lõhmus A., University of Tartu, EE

Metal oxide micro- and nanofibre materials are crucial in numerous technical solutions like textiles, filter mattes, optical cables, thermal insulators, reinforcing components, etc. However, complications to prepare these materials in desired shape often limit their [...]

Application of nanoindentation for constituent phases testing

Hussainova I., Jasiuk I., Tallinn University of Technology, EE

Development of advanced composites requires a detailed knowledge of their constituents’ properties as they are often somewhat different from the materials at their bulk form. In the present study, the nanoindentation techniques of two different [...]

Preparation and applications of transition metal oxide nanofibres and nanolines

Tätte T., Paalo M., Part M., Kisand V., Lõhmus A., Kink I., University of Tartu, EE

Recently many nanoscale silica structures have been suggested for optics device design. For example silica nanoneedles are used for focusing light into spot some tens of nanometers in diameter and sub-wavelength diameter silica fibres are [...]

Preparation of transparent electrodes based on CNT-s doped metal oxides

Paalo M., Tätte T., Visk U., Lõhmus A., Lõhmus R., Lõhmus A., Lõhmus R., Kink I., University of Tartu, EE

In recent year’s electrically conductive and transparent electrodes has been one of the most important issues in optoelectronics. High price of ITO have set the search for alternative materials into focus. CNT-s has been used [...]

1D transition metal oxide materials: preparation and applications

Tätte T., Paalo M., Talviste R., Kisand V., Saal K., Mäeorg U., Lõhmus A., Kink I., University of Tartu, EE

Recently many new technologies have been suggested for designing silica based optical devises in nanoscale. However, there are insuperable drawbacks in realizing optics based on silica (glass and quartz) because of their low refractive indexes. [...]

Modeling of Light Reflection from Nanodimensional Anisotropic Multilayer Films on Isotropic Substrate

Adamson P., University of Tartu, EE

Nanoscale multilayers offer outstanding possibilities in the technology of various nanoscale photonic or electronic devices. A widespread way to probe nanometric layers is to employ optical reflection methods. A purpose of this paper, first, is [...]

Long-Wavelength Approximation Theory of Light Reflection from Nanoscale Anisotropic Layered Media

Adamson P., University of Tartu, EE

Nanoscale anisotropic thin films and multilayers are of most interest in surface science and nanotechnology. A widespread way to probe nanometric layers is to employ optical reflection methods. But the use of exact equations to [...]

Preparation of Sb Doped SnO2 SPM Tips and their Use as Transparent Probes in STM Induced Light Hybrid Microscopy

Tätte T., Jacobsen V., Paalo M., Branscheid R., Kreiter M., Mäeorg U., Saal K., Lõhmus A., Kink I., Tartu University, EE

Development of various kinds of sharp needles has been in focus of investigators since their application as sensors in scanning probe microscopy. Although transparent and conductive tips lead to several fascinating applications like STM/SNOM hybrid [...]

Sol-gel Silane Films for DNA Microarray Experiments

Saal K., Tätte T., Kink I., Kurg A., Lõhmus A., Lõhmus R., Mäeorg U., Rinken A., Lõhmus A., Lõhmus R., University of Tartu, EE

Aim of the current research is development of a method for producing a new kind of aminosilanized films suitable for applications utilizing immobilized DNA molecules. We report on new progress in a procedure proposed in [...]

In Situ Transformations of Gold Contacts Studied by Moleculad Dynamics Simulations

Pokropivny A.V., Pokropivny V.V., Lõhmus A., Lõhmus R., Lõhmus A., Lõhmus R., Erts D., Pokropivny A.V., Pokropivny V.V., Olin H., University of Latvia, EE

We apply molecular dynamics methods for simulation of in situ processes in new combined TEM/SPM technique. The atomic structure transformations of a gold nanobridge between two contacts are studied in processes of loading-unloading and friction [...]