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SEM Observation of Nucleation and Growth of Ag Crystallites on Graphite Substrate
Author(s) -
Gotoh Yoshihiko,
Horii Akira,
Ishii Toshio,
Kawanowa Hitoshi,
Yumoto Hisami,
Gonda Takehiko
Publication year - 1995
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.2170300615
Subject(s) - crystallite , nucleation , coalescence (physics) , scanning electron microscope , materials science , substrate (aquarium) , graphite , condensation , chemical engineering , crystallography , chemistry , composite material , metallurgy , organic chemistry , physics , oceanography , astrobiology , engineering , thermodynamics , geology
“In‐Situ” observation of nucleation and growth of Ag crystallites on graphite substrate by vapour deposition was carried out by scanning electron microscope (SEM). Irradiation of the SEM electron beam onto the substrate surface before and during deposition enhanced Ag nucleation. The density of the Ag crystallites was 10 10 /cm 2 in room temperature condensation, but decreased to 10 9 /cm 2 in high temperature condensation at 140 °C. When the substrate was heated after room temperature condensation, the density of the Ag crystallites decreased prominently. This means that coalescence of the Ag crystallites takes place as a result of their migration on the substrate.