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Formation of porous zinc nanostructures during self‐organization of critically small steady‐state supersaturations
Author(s) -
Perekrestov Vyacheslav,
Kornyushchenko Anna,
Latyshev Vitalii,
Ostendorp Stefan,
Wilde Gerhard
Publication year - 2015
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.201451266
Subject(s) - supersaturation , materials science , porosity , chemical vapor deposition , nanostructure , nanotechnology , deposition (geology) , nanowire , zinc , chemical engineering , chemical physics , chemistry , composite material , metallurgy , paleontology , organic chemistry , sediment , engineering , biology
Porous zinc nanosystems have been obtained with help of a technological approach, which is based on the self‐organization in plasma‐condensate systems during vapor deposition at critically small supersaturations. The main advantage of the proposed approach is the outstanding reproducibility of the structural and morphological characteristics of the nanostructured condensates films. The experimental results have shown that three structure formation zones can be distinguished depending on the deposition parameters, such as the working gas pressure P Ar and the discharge power P w . Within each zone morphologically identical porous layers are formed. The first zone corresponds to nanowire formation with diameters ranging from 60 to 200 nm, which are connected into nodes. The transition to the second zone is observed at P Ar greater than 5 Pa and P w less than 27 W. The increase of P Ar and the decrease of P w in the described range cause an increase of the supersaturation value. As a result a gradual transition to the formation of faceted crystals occurs. It is established, that the presence of chemically active residual gases suppresses the nanowire formation for the whole range of the parameters used.