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On the habitus modification of silver microcrystals by electrolityc origin
Author(s) -
Yasnikov I.S.,
Dorogov M.V.,
Tyurkov M.N.,
Vikarchuk A.A.,
Romanov A.E.
Publication year - 2015
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.201400421
Subject(s) - faceting , icosahedral symmetry , crystallography , electrolyte , alkali metal , chemistry , octahedron , chemical physics , materials science , crystal structure , organic chemistry , electrode
We present experimental facts on the role of electrolyte pH in shape control of electrodeposited small silver microcrystals. Increasing electrolyte pH value, i.e . the transition from acidic to alkali solutions, causes the change of microcrystal habitus from strongly distorted (pH ∼ 4) through faceted (pH ∼ 7) to smooth hemispheric (pH ∼ 10) ones. At neutral pH ∼ 7 the observed silver microcrystals demonstrated shapes with pentagonal symmetry including icosahedral microcrystals with incoming pentagonal facets at the icosahedron vertices that is unique for single‐component small metallic particles. Such faceting has previously been reported only for bicompounent B 6 O icosahedral small particles [H. Hubert et al ., Nature 391, 376 (1998)].