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Electrical, optical and structural properties of simple and transition ultrathin metal films

Work number - M 59 AWARDED

Bihun R.I., Kushnir O.O., Buchkovska M.D.

IvanFranko National Universityof Lviv.


The wide practical use of thin metal films leads to targeted investigation of their physical properties. The conductive elements of modern micro- and nanoelectronics, nanoplasmonics, microwave and optoelectronics devices are based on metal layers. Rapid development of which requires the creation of ultrathin, stableand conductive metal films with high optical transparency. The investigation of physical properties of electrically continuous and discontinuous ultrathin metal films gives valuable information about fundamental properties.

The interrelationship between both optical and electrical properties, as well as the metallic clusters shape and size of metal-dielectric composite of simple (Cu, Au and Ag) and transition (Pd and Ni) metals must be established. The influence of previously deposited on the surface of dielectric and weakly conducting substrate the surfactant underlayers of different thickness on metal film properties must be determined.

For the first time, the fractal structure of ultrathin metal films island which characterized by the local environmental anisotropy of each nanoparticle, the increase of the energy of the incident electromagnetic wave in local points at 100 – 260 times due to the redistribution of energy by surface plasmons, which leads to increased effectiveness of all field effects in the influence of neighbor environs was found. The surfactants underlayers will reduce the linear dimensions of the cluster that will increase the local field energy enhancement at least more than 60 times. The possibility of controlled growth of ultra thin films of transition and simple metals in the thickness range (1 – 50 nm) using previously deposited on the surface substrate germanium and antimony surfactant underlayers was shown. In the framework of quantum-mechanical approach the model of the charge transport phenomenon in low-dimensional systems were developed.

The experimental results have a significant practical and fundamental data about the reflection and transmission spectra, structure, surface morphology and the size dependence of the thin films kinetic coefficients of studied metals. Those data can be used in modern materials science, micro-nanoelectronics, nanoplasmonics and other branches of science and technique for manufacturing ultrathin electrically conductive and optically transparent layers with predicted physical properties. The investigation of physical parameters of ultra-thin metal films will greatly accelerated with patented express research methods of structure investigation. In glass tetraboric material intercalated with silver nanoparticles by unique appropriate technology the self-focusing effect of light was observed. That material will be applied in nanophotonic and optical computing devices.

All experimental and calculation results were published in 97 scientific papers, 15 of them in international journals in the SCOPUS database, 24 in local area professional journals and 49 in international conferences meetings. The total candidates citation index (h – index) according to SCOPUS database is – 4.