Circular patterns of calcium oxalate monohydrate induced by defective Langmuir–Blodgett film on quartz substrates
作者： Jie-Yu He , Jian-Ming Ouyang
DOI: 10.1016/J.MSEC.2008.06.027
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摘要: Abstract The defective Langmuir–Blodgett (LB) film of dipalmitoylphosphatidylcholine (DPPC) on quartz injured by potassium oxalate (K 2 C O 4 ) was used as a model system to induce growth calcium crystals. Atomic force microscopy (AFM) indicated that circular domains with diameter 1–200 μm existed in the LB film. Scanning electron (SEM) showed patterns aggregated monohydrate (COM) crystallites were induced these domains. It ascribed interaction between negatively-charged ions and phosphatidyl groups DPPC headgroups makes phospholipid molecules rearranged exist an out-of-order state film, especially at boundaries liquid-condensed (LC)/liquid-expanded (LE) phases, which provide much more nucleating sites for COM
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