Funct. Mater. 2019; 26 (4): 729-733.

doi:https://doi.org/10.15407/fm26.04.729

Formation of nanostructures on the basis of porous anodic niobium oxide

I.M.Ryshchenko, I.V.Lyashok, V.P.Gomozov, S.A.Vodolazhchenko, S.G.Deribo

National Technical University "Kharkiv Polytechnic Institute", 2 Kyrpychova Str., 61002 Kharkiv, Ukraine

Abstract: 

Self-organization of nanoscale structures under an electrochemical treatment is most pronounced during the formation of porous anodic metal (aluminum, titanium, niobium, and tantalum) oxides. A theoretical approach is proposed to describe the processes of the self-organization that allows one to determine the conditions for the formation of porous niobium oxides with amorphous or crystalline structure. The studies have shown the influence of the electrolyte nature on the formation of oxide layers. The use of an activator (fluoride) provides the conditions for the formation of oxides with different surface morphology at the initial stage of anodizing. By varying the mode of niobium anodizing, one can investigate the nature of pore nucleation at the initial stage of their growth, as well as track the in-time evolution of their geometrical dimensions, depending on the formation conditions, and synthesize porous AOFs on niobium with an amorphous or crystalline structure.

Keywords: 
electrochemical dissolution, anodic behavior, niobium, porous niobium oxide, electrolyte synthesis.

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