Fabrication and micropatterning of a hybrid composite of amorphous calcium carbonate and poly(ethylenimine)

Cited 1 time in scopus
Metadata Downloads
Title
Fabrication and micropatterning of a hybrid composite of amorphous calcium carbonate and poly(ethylenimine)
Author(s)
H S Lee; Tai-Hwan Ha; H M Kim; K Kim
Bibliographic Citation
Bulletin of Korean Chemical Society, vol. 28, no. 3, pp. 457-462
Publication Year
2007
Abstract
Amorphous calcium carbonate (ACC) can readily be prepared using ethanol as the reaction medium and ammonium carbonate as the source of carbon dioxide. Other additives, or any elaborate pH control are not needed to form the initial calcium carbonate precipitate. Ammonia generated from ammonium carbonate maintains the reaction medium in a neutral or weakly basic condition, retarding the crystallization of ACC, while ethanol itself inhibits the dissolution of ACC. The ACC prepared in this way provides a rare opportunity to fabricate molded biomimetic crystals in vitro, but the ACC is too fragile to be fabricated into proper shapes. The malleability of ACC is, however, greatly enhanced by incorporating poly(ethylenimine) (PEI). The ACC/PEI composite can then be fabricated, using a proper mold or template, into mechanically durable biomimetic crystals of definite shape. The ACC in the ACC/PEI composite can further be transformed into vaterite by heating under N2 atmosphere, while the native ACC simply converts into calcite.
Keyword
Amorphous calcium carbonateBiological hybrid compositeBiomimetic crystalMicropatterningPoly(ethylenimine)
ISSN
0253-2964
Publisher
Wiley
DOI
http://dx.doi.org/10.5012/bkcs.2007.28.3.457
Type
Article
Appears in Collections:
Division of Bio Technology Innovation > Core Research Facility & Analysis Center > 1. Journal Articles
Files in This Item:
  • There are no files associated with this item.


Items in OpenAccess@KRIBB are protected by copyright, with all rights reserved, unless otherwise indicated.