Процеси структуроутворення у парофазних наноконденсатах PbTe:Bi на ситалі

D. M. Freik; I. S. Bylina; L. Y. Mezhylovska; R. V. Umantsiv

doi:10.15407/hftp06.03.388

Authors

D. M. Freik Vasyl Stefanyk Precarpathian National University
I. S. Bylina Vasyl Stefanyk Precarpathian National University
L. Y. Mezhylovska Vasyl Stefanyk Precarpathian National University
R. V. Umantsiv Vasyl Stefanyk Precarpathian National University

DOI:

https://doi.org/10.15407/hftp06.03.388

Keywords:

Lead telluride, vapor-phase condensates, mechanisms of growth, Ostvald maturation, orientation aspects

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 TV = (920–1020) K, substrates – TP = (420–520) K; deposition time ? varied within ? = (3–120) s with a thickness of condensates d = (50–2000) nm, and average lateral (DC) and normal (hC) nanocrystal dimensions were DC = (25–110) nm and hC = (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.

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