The Surface Structure of Hydroxyapatite Single Crystal and the Accumulation of Arachidic Acid

✍ Scribed by Kimiyasu Sato; Yasushi Suetsugu; Junzo Tanaka; Sachio Ina; Hideki Monma

• Publisher: Elsevier Science
• Year: 2000
• Tongue: English
• Weight: 297 KB
• Volume: 224
• Category: Article
• ISSN: 0021-9797
• DOI: 10.1006/jcis.1999.6623

✦ Synopsis

Single crystals of hydroxyapatite (HAp) were grown by a flux method using β-tricalcium phosphate and Ca(OH) 2 under hot isostatic pressure. After chemical etching by 0.05 N HCl aqueous solution, the HAp crystal surfaces were observed by an atomic force microscope (AFM) and shown dominantly to consist of steps with heights corresponding to a lattice distance d(100) or its 2/3. Arachidic acid films were accumulated on the etched HAp crystal by a Langmuir-Blodgett method. From section analyses by AFM, a distance between the carboxyl groups of arachidic acid and the HAp surface was estimated to be approximately 0.04 nm, sufficiently adjacent for a chemical interaction to take place.