Процеси структуроутворення у парофазних наноконденсатах PbTe:Bi на ситалі

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, su...

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Bibliographische Detailangaben
Datum:2017
Hauptverfasser: Freik, D. M., Bylina, I. S., Mezhylovska, L. Y., Umantsiv, R. V.
Format: Artikel
Sprache:Ukrainisch
Veröffentlicht: Chuiko Institute of Surface Chemistry National Academy of Sciences of Ukraine 2017
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Online Zugang:https://www.cpts.com.ua/index.php/cpts/article/view/345
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Назва журналу:Chemistry, Physics and Technology of Surface

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Chemistry, Physics and Technology of Surface
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Zusammenfassung: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.