Growth of calcium oxalate crystals induced by complex films containing biomolecules by Anjian Xie, Yuhua Shen, Dong Ma, Fangzhi Huang, Lingguang Qiu, Shikuo Li, and Long Chen

Crystal Research and Technology

Cryst. Res. Technol. 42, 667 (2007) - Abstract -

Growth of calcium oxalate crystals induced by complex films containing biomolecules

Anjian Xie, Yuhua Shen, Dong Ma, Fangzhi Huang, Lingguang Qiu, Shikuo Li, and Long Chen

School of Chemistry and Chemical Engineering, Anhui University, Hefei 230039, China

Keywords	calcium oxalate, biomineralization, biomolecule, complex film
PACS	68.08.De, 68.55.-a, 81.10.-h, 68.08.-p
DOI	10.1002/crat.200610886

Nucleation and growth of calcium oxalate (CaC₂O₄) crystals induced by films composed of phosphatidylcholine (PC), cholesterol (CS) and human serum albumin (HSA), and of PC, CS and dextran have been carried out. The products obtained were characterized by Fourier transform infrared spectroscopy, scanning electron microscopy and ultraviolet-visible spectroscopy. The results indicate that hexagonal calcium oxalate monohydrate (COM) and club-shaped calcium oxalate trihydrate (COT) crystals are obtained on the PC/CH/HSA film, and the microstructure and properties of the PC/CH/HSA film depend on the weight ratio of PC to CS. With an increase in the PC-to-CS ratio, the number of COM crystals decreases gradually, and finally disappear, suggesting that PC inhibits the growth of COM crystals. On the PC/CS/dextran film, irregular COM and COT crystals are formed. The possible formation mechanisms of CaC₂O₄ on the two complex films are discussed.

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