Processes of structure formation in the vapor phase nanoсondensatеs of PbTe:Bi on pyroceram
Year: 2015
Type: article
Abstract: By analyzing the results of AFM imaging, processes have been studied of structure formation of vapor-phase condensates of doped 1 at. % Bi lead telluride. Vapor deposition was carried out in an open vacuum on to substrates of polycrystalline ceramics at evaporation temperatures T V = (920–1020) K, substrates – T P = (420–520) K; deposition time τ varied within τ = (3–120) s with a thickness of condensates d = (50–2000) nm, and average lateral (D C ) and normal (h C ) nanocrystal dimensions were D C = (25–110) nm and h C = (8–78) nm, respectively. It has been shown that in the process of nucleation, Folmer-Weber mechanism dominates, when the three-dimensional nanostructures are formed on the substrate surface. Mechanisms of nanocrystal growth are explained from the standpoint of Ostvald maturation. It has been found that the surface of ceramics individual nanocrystals are formed from combinations of planes {100} and {110} of NaCl structure.
Institution: Vasyl Stefanyk Carpathian National University
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W2614190338