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Träfflista för sökning "WFRF:(Bielecki Johan 1982) ;pers:(He Wenxiao 1985)"

Sökning: WFRF:(Bielecki Johan 1982) > He Wenxiao 1985

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1.
  • He, Wenxiao, 1985, et al. (författare)
  • Biomimetic nanocrystalline apatite resembling bone
  • 2010
  • Ingår i: European Cells and Materials: 3rd International NanoBio Conference 2010, ETH Zurich, Switzerland August 24-27 2010. - 1473-2262. ; 20:suppl. 3, s. 106-
  • Konferensbidrag (refereegranskat)
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2.
  • He, Wenxiao, 1985, et al. (författare)
  • Formation of Bone-like Nanocrystalline Apatite Using Self-Assembled Liquid Crystals
  • 2012
  • Ingår i: Chemistry of Materials. - : American Chemical Society (ACS). - 0897-4756 .- 1520-5002. ; 24:5, s. 892-902
  • Tidskriftsartikel (refereegranskat)abstract
    • A two-step process using liquid crystalline phases combined with controlled postcrystallization for the preparation of bone-like apatite has been developed. First, amorphous calcium phosphate (ACP) spherules with a diameter of 10.8 +/- 1.4 nm and specific surface area (SSA) in the range of 150-170 m(2)/g were synthesized within a reverse hexagonal liquid crystalline (LC) phase. Second, the ACP spherules were dispersed and aged in Milli-Qwater, where they crystallized into poorly crystalline apatite (PCA). The addition of heparin during aging was explored, which was shown to retard the ACP - PCA conversion. The particle formation within the LC phase was monitored using synchrotron small-angle X-ray scattering, and the formed materials were characterized by X-ray diffraction, conventional and high-resolution transmission electron microscopy, nitrogen adsorption, thermogravimetry with infrared-coupled analysis, and Raman spectroscopy. The PCA formed using the LC aging route presented bone-resembling features, such as,Ca2+ and OH- deficiency, CO32- substitution, poor crystallinity; and ultrahigh SSA of 356 m(2)/g. The resulting particles were compared to hydroxyapatite synthesized via a conventional water-based precipitation method. The LC-aging route exhibited excellent controllability over the CaP crystallization, which enabled facile tailoring of the resulting material properties for different types of application.
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