.png){kind=icon}
.png){kind=icon}
Return
Rosette-Shaped Calcite Structures at Surfaces: Mechanistic Implications for CaCO3 Crystallization
.png){kind=icon}
PRE
AI
S
I
DOI：10.1002/asia.201000190.png)
.png){kind=icon}
Original request for help.png){kind=icon}
Share.png){kind=icon}
Save
Abstract
En 中文
Biomineralization is believed to be achieved by the intimate cooperation of soluble macromolecules and an insoluble matrix at the specific inorganic organic interface. It has been reported that positively charged matrices play an important role in controlling the structure of CaCO3 at surfaces, although detailed mechanisms remain unclear. In this work, we studied the transformation from amorphous CaCO3 to calcite crystals on surfaces by using thin films of poly(2-(dimethyl-amino)ethyl methacrylate) (PDMAEMA) and its quaternized form. The positively charged PDMAEMA film was found to possess unique properties for CaCO3 crystallization: individually separated, single calcite crystals were formed on the PDMAEMA film in the absence of poly(acrylic acid) (PAA), while circularly fused calcite crystals were formed in the presence of PAA. The circularly fused (rosette-shaped) calcite crystals could be changed from a completely packed rosette to a ring-shaped, hollow structure by tuning the crystallization conditions. A number of factors, such as reaction time, amount of (NH4)(2)CO3, concentration of PAA, and charge of matrix-films, were varied systematically, and we now propose a mechanism based on these observations.
Keywords:
amorphous materials
calcite
calcium
crystallization
polymers
AI Summary
Key information extracted from the uploaded paper, including a brief overview, abstract, background, key highlights, visual analysis, and future outlook.
Journal
C
IF:
3.3
Papers:
8.1K
Citations:
1.7W
Organization
No organization information available
Cited Papers