The Role of Mg2 and BSA Langmuir Monolayers in Controlling Polymorph and Morphology of CaCO3 Crystal
Year: 2020
Type: article
Abstract: Mg 2+ and bovine serum albumin (BSA) Langmuir monolayers were used as effective crystal nucleation and growth modifiers and template to control the crystallization of CaCO 3 .The polymorph and morphology of crystals were characterized using scanning electron microscopy (SEM), and X-ray diffraction (XRD).The results demonstrated that various morphologies such as abacus-bead-like particles, spherical-shaped particles, wood block-like particles, pignut-shell-like particles and the rolling pole shaped particles produced at the interface of film/solution.With the increasing of the molar ratio of Mg 2+ to Ca 2+ , the polymorph of calcium carbonate obtained undergoes an evolvement from calcite to vaterite and aragonite.The ability of Mg 2+ to induce the formation of aragonite was enhanced as the molar ratio of Mg 2+ to Ca 2+ increased.When the molar ratio reached 3, the crystals obtained were all aragonite.In the systems of Mg 2+ -BSA Langmuir monolayers, the presence of Mg 2+ was helpful for the formation of aragonite.The possible formation mechanisms of CaCO 3 in different systems were discussed in the paper.
Source: OALib
Authors: Zhonghui Xue, Ning Xue
Language: English
Subfield: Biomaterials
Field: Materials Science
Domain: Physical Sciences
Open Access status: diamond
Award: G6600658140
OpenAlex ID: W3020856421