Chemical analyses of hydroxyapatite formation on SAM surfaces modified with COOH, NH_2, CH_3, and OH functions
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概要
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Hydroxyapatite formation was examined at the surface of self-assembled monolayers (SAMs) modified with four functional groups, -COOH, -NH2, and -OH. For COOH-SAM and NH2-SAM, scanning electron spectroscopic observation showed that flake-like sheet crystals covered the whole wafer and small broccoli-like crystals were observed occasionally on the flake-like crystal base layer. For CH3-SAM and OH-SAM, no flake-like sheet crystals were observed; broccoli-like crystals were observed in a dispersed manner for CH3-SAM, but in localized spots for OH-SAM. X-ray diffraction patterns showed a strong apatite pattern oriented toward the c-axis direction for COOH-SAM. ESCA analysis revealed distinct Ca, P, O peaks for COOH-, NH2-, CH3-, and OH-SAM. Surface plasmon resonance (SPR) analysis indicated that during the supply of supersaturated calcium phosphate solution, the deposition of precipitates increased monotonically with time for COOH-SAM, increased slightly for NH2-SAM, but little increase in deposition was detected for CH3-SAM and OH-SAM.
- 2010-08-07
著者
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OKAZAKI Masayuki
Department of Biomaterials Science, Graduate School of Biomedical Science, Hiroshima University
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HIRATA Isao
Department of Biomaterials Science, Graduate School of Biomedical Sciences, Hiroshima University
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AKAMATSU Mai
Department of Biomaterials Science, Graduate School of Biomedical Sciences, Hiroshima University
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FUJII Eri
Department of Biomaterials Science, Graduate School of Biomedical Sciences, Hiroshima University
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POOLTHONG Suchit
Department of Operative Dentistry, Faculty of Dentistry, Chulalongkorn University
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