Complementary control by additives of the kinetics of amorphous CaCO3 mineralization at an organic interface: in-situ synchrotron x-ray observations.
The kinetics of biomimetic mineralization at a fatty acid monolayer interface have been measured in situ by synchrotron x-ray reflectivity. The formation of biologically relevant amorphous calcium carbonate films is affected by soluble macromolecules, supersaturation rate of change, and Mg cations. We find that these solution conditions influence mineral film formation in a complementary fashion. Poly(sodium acrylate) extends the lifetime of metastable amorphous calcium carbonate, solution saturation controls the mineral film growth rate, and Mg cations create a longer induction time. This is the first quantification of potentially competitive biomineralization mechanisms that addresses nucleation and growth of the amorphous mineral phases, which are important in biomineralization.
DiMasi
Elaine
E
National Synchrotron Light Source Department, Brookhaven National Laboratory, Upton, New York 11973-5000, USA.
Kwak
Seo-Young
SY
Amos
Fairland F
FF
Olszta
Matthew J
MJ
Lush
Debra
D
Gower
Laurie B
LB
D040761:Biomimetic Materials / Q000032:analysis / Q000737:chemistry*; D002119:Calcium Carbonate / Q000032:analysis / Q000737:chemistry*; D008422:Materials Testing; D008903:Minerals / Q000032:analysis / Q000737:chemistry*; D008968:Molecular Conformation; D009930:Organic Chemicals / Q000032:analysis / Q000737:chemistry*; D013499:Surface Properties; D017356:Synchrotrons; D014961:X-Ray Diffraction
D008903:Minerals; D009930:Organic Chemicals; D002119:Calcium Carbonate