Get access
Advanced Materials

Stable Amorphous CaCO3 Microparticles with Hollow Spherical Superstructures Stabilized by Phytic Acid


  • A.-W Xu thanks the Alexander von Humboldt Foundation for granting a research fellowship. This work was partially supported by the National Natural Science Foundation of China (20371053) and the Guangdong Province NNSF (031574). Supporting Information is available online at Wiley InterScience or from the author.


Amorphous CaCO3 (ACC) is stabilized by the presence of phytic acid, a natural inositol hexakisphosphate (IP6). Micrometer-sized hollow spheres of ACC have been obtained (see Figure). The spheres are stable for at least three months in solution, which is equivalent to that described for more complex special biopolymers in biomineralization processes, and by far exceeds the previously known stability of ACC prepared in the presence of synthetic molecules.

original image
Get access to the full text of this article