Journal of Materials Science

, Volume 41, Issue 17, pp 5424–5428 | Cite as

Agglomeration control of hydroxyapatite nano-crystals grown in phase-separated microenvironments

  • Kimiyasu SatoEmail author
  • Yuji Hotta
  • Takaaki Nagaoka
  • Masaki Yasuoka
  • Koji Watari


Materials synthesis processes that require high temperatures consume large quantities of energy that generate an environmental burden. We attempted to synthesize hydroxyapatite (HAp) nano-crystals without firing or melting. “Water in oil” (W/O) emulsions were employed as microreactors for HAp formation. The surfactant-bounded water mediated HAp crystal nucleation, and HAp nano-crystallites were obtained. The obtained particles were aggregates composed of plate-like nano-crystals and monodisperse tiny crystals. Utilization of the W/O emulsions resulted in tunable nucleation frequency and the reactant provision, and yielded HAp nano-crystals with characteristic agglomeration properties.


Organic Functional Group Nucleation Frequency Agglomeration State Size Distribution Profile Reactant Provision 


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Copyright information

© Springer Science+Business Media, LLC 2006

Authors and Affiliations

  • Kimiyasu Sato
    • 1
    Email author
  • Yuji Hotta
    • 1
  • Takaaki Nagaoka
    • 1
  • Masaki Yasuoka
    • 1
  • Koji Watari
    • 1
  1. 1.National Institute of Advanced Industrial Science and Technology (AIST)NagoyaJapan

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