Continuous crystalline carbonate apatite thin films. A biomimetic approach.
Continuous crystalline carbonate apatite thin films. A biomimetic approach.
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DOI：
10.1021/ja002537i
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发表时间：
2001-02
影响因子：
15
通讯作者：
G. Xu;I. Aksay;J. Groves
中科院分区：
文献类型：
--
作者：
G. Xu;I. Aksay;J. Groves
与对羟基磷灰石薄膜的广泛研究相比，对碳酸磷灰石（大石岩）薄膜的研究很少。在本报告中，我们描述了通过仿生途径组装的高结晶大石石薄膜的合成和表征。采用溶液抑制模板法（模板抑制法）在空气-水界面制备了非晶相碳酸磷酸钙的独立连续前驱体膜。硬脂酸表面单层作为模板，碳酸盐-磷酸盐溶液组成二元缓蚀体系。在空气/水界面形成的前驱体膜在900℃下加热，转化为致密的结晶膜，保留了前驱体的整体形状。XRD和IR表征该晶相为单相碳酸盐磷灰石，在a型（OH-）和B型（PO4(3-)）晶格位置均有碳酸盐取代。
In contrast to extensive studies on hydroxyapatite thin films, very little has been reported on the thin films of carbonated apatite (dahllite). In this report, we describe the synthesis and characterization of a highly crystalline dahllite thin film assembled via a biomimetic pathway. A free-standing continuous precursor film of carbonated calcium phosphate in an amorphous phase was first prepared by a solution-inhibited templating method (template-inhibition) at an air-water interface. A stearic acid surface monolayer acted as the template, while a carbonate-phosphate solution composed a binary inhibition system. The precursor film formed at the air/water interface was heated at 900 degrees C and transformed into a dense crystalline film that retained the overall shape of the precursor. The crystalline phase was characterized by XRD and IR to be a single-phase carbonate apatite, with carbonate substitutions in both type A (OH-) and type B (PO4(3-)) lattice positions.