This paper was published in a journal specialized for applied surface science. The oxidation of stainless steel at extreme conditions was elaborated. The samples were treated in air plasma and simultaneously exposed to concentrated solar radiation at the power density exceeding 10 MW/m2. The experiment was performed at European solar facility in Font Romeu, France. The oxidation mechanism was found to be completely different from classical one leading to nanostructured surface.
COBISS.SI-ID: 22237479
The scientific paper was published in the classical journal in the field of applied physics. The experiemnts showed that interaction between oxygen plasma and pure niobium leads to spontaneous growth of niobium oxide nanowires. The presence of these nanowires leads to a substantial increase of the recombination coefficient that may increase for over an order of magnitude causing strong gradients in the vicinity of the surface. Such material represents a huge sink for neutral oxygen atoms. Such nanostructured material is suitable for independent control of O density.
COBISS.SI-ID: 20681511
Results of experiments performed at European solar facility in Font Romeu, France, are presented. Samples of stainless steel oxidize under plasma exposure. At low temperature, iron oxide is formed, while at elevated temperature chromium oxide is detected and eventually becomes predominant at 900 K. Manganese ssegregates on the surface at 550K and persists even at temperatures over 900 K. The surface properties of such treated stainless steel therefore depends on the manganese which exhibits much more catalytic activity for surface recombination of oxygen atoms than untreated stainless steel.
COBISS.SI-ID: 20985127
To the best of uor knowledge, this paper represents the first report worldwide on synthesis of superstructure [alpha]-Fe[sub]2O[sub]3 nanowire and nanobelt arrays. We found that, under limited range of plasma parameters, one or two dimensional nanoparticles grow spontaneously from iron substrates during exposure to reactive oxygen plasma.
COBISS.SI-ID: 22004519
Systematic research on interaction between oxygen plasma with different parameters and iron substrates brought an invention of a method for tailoring the structure of nanoparticles. We found that long-range ordering of oxygen-vacancy planes in [alpha]-Fe[sub]2O[sub]3 nanowires and nanobelts can be achieved by treatment of substrates heated to elevated temperature with a combination of neutral oxygen atoms and moderately accelerated positively charged ions.
COBISS.SI-ID: 21739815