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Precipitation of Hydroxyapatite under Stearic Acid Monolayers
Author(s) -
Unuma Hidero,
Ito Kazutoshi,
Ota Toshitaka,
Takahashi Minoru
Publication year - 1996
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1996.tb08999.x
Subject(s) - monolayer , stearic acid , nucleation , crystallite , precipitation , epitaxy , materials science , crystallography , chemical engineering , chemistry , nanotechnology , layer (electronics) , organic chemistry , composite material , physics , meteorology , engineering
The nucleation and growth of hydroxyapatite (HAp) crystals from solutions with and without Langmuir monolayers of stearic acid (SA) were investigated. The monolayers apparently enhanced the nucleation of HAp. Monolithic, filmlike polycrystalline HAp with preferred orientation of (00l) planes parallel to the monolayer interface was precipitated, while colloidal and powdery precipitation in the bulk solution was predominant in the absence of the monolayer. Geometrical similarity was found between the hexagonal packing conformation of the SA headgroups in the monolayers and the alignment of calcium ions in the (001) plane of HAp. It was suggested that HAp crystals nucleated and grew epitaxially on the monolayer interface.