synteses and Characterization of biominerals formed on monolayer organic molecular films
单层有机分子膜上形成的生物矿物的合成和表征
基本信息
- 批准号:14540444
- 负责人:
- 金额:$ 1.98万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for Scientific Research (C)
- 财政年份:2002
- 资助国家:日本
- 起止时间:2002 至 2003
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
The purpose of the present study is to elucidate the biomineralization mechanisms that are presumably different from those in inorganic processes. Biomineralization was simulated in the laboratory, by selecting polymerized 10,12-Pentacosadiynoic acid(p-PDA)LB films as organic template and calcium carbonate as biominerals. It was found by electron diffraction study that carboxyl groups are regularly (pseudo-hexagonally) arranged on the p-PDA film. When the silica substrates covered with the p-PDA film were soaked in a solution supersaturated with CaCO_3, calcite crystals were precipitated on the substrates. the crystal orientation of the calcite was analyzed by using electron back-scattering diffraction (EBSD) technique in a field-emission type high-resolution SEM. This new technique revealed the orientation relationship between the polymerized direction of PDA and crystal orientation of calcite accurately. One of the a-axes of calcite was strictly oriented parallel to the polymerized d … More irection, which was identified by the surface cracking of the film, of PDA. the c-axis of calcite was necessarily perpendicular to the polymerized direction but their direction (standing angle from the substrate) was varied. Other CaCO_3 polymorphs, aragonite and vaterite, are rarely formed on the film but no epitaxial relations were observed.Besides these experiments, the effects of rare-earth elements in solution on the morphology of calcium carbonate crystals were also investigated. Very small amount of La^<3+> ion changed the shape of calcite drastically, but did not change that of vaterite at all. La^<3+> also acted as an inhibitor against the precipitation of calcite from supersaturated solution. These two effects must be related intimately during calcite precipitation and crystal growth. Furthermore, the EBSD technique was applied to several biominerals in nature. Especially the relationship between the structure and crystal orientations of constituting calcite crystals in coccolith (scale of coccolith algae) was successfully determined. Less
本研究的目的是阐明可能不同于无机过程的生物矿化机制。以聚10,12-二十五碳二炔酸(p-PDA)LB膜为模板,碳酸钙为生物矿物,在实验室条件下模拟了生物矿化过程。通过电子衍射研究发现,羧基在p-PDA膜上规则地(准六边形)排列。当用p-PDA膜覆盖的二氧化硅衬底浸泡在CaCO_3过饱和溶液中时,方解石晶体在衬底上沉淀。通过在场发射型高分辨率SEM中使用电子背散射衍射(EBSD)技术分析方解石的晶体取向。该技术准确地揭示了PDA聚合方向与方解石晶体取向之间的取向关系。方解石的a轴之一严格平行于聚合的d轴取向, ...更多信息 定向,这是确定的膜的表面开裂,PDA。方解石的c-轴必须垂直于聚合方向,但它们的方向(与基材的垂直角)是变化的。另外,还研究了溶液中稀土元素对碳酸钙晶体形貌的影响。极少量的La^<3+>离子使方解石的形状发生了剧烈的变化,但对球霰石的形状没有任何影响。La^<3+>对过饱和溶液中方解石的析出也有抑制作用.这两种效应在方解石沉淀和晶体生长过程中必然是密切相关的。此外,EBSD技术被应用于自然界中的几种生物矿物。特别是成功地确定了构成颗石藻中方解石晶体的结构与晶体取向之间的关系。少
项目成果
期刊论文数量(48)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
木暮敏博, 立川統: "電子線後方散乱回析(EBSD)の鉱物学への応用"岩石鉱物科学. 31. 275-282 (2002)
Toshihiro Kogure、Osamu Tachikawa:“电子背散射衍射 (EBSD) 在矿物学中的应用”《岩石与矿物科学》31. 275-282 (2002)。
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J.X.He, H.Sato P.Yang, A.Yamagishi: "Creation of a Steoselective Solid Surface by Self-assembly of a Chiral Metal Complex onto a Nano-thick Clay Film"Electochemisty Communications. 5. 388-391 (2003)
J.X.He、H.Sato P.Yang、A.Yamagishi:“通过将手性金属络合物自组装到纳米厚粘土膜上来创建立体选择性固体表面”电化学通讯。
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Y.Kumagai, K.Sato, N.Ozaki, T.Kogure, J.Tanaka: "Interfacial interactions betoween polymerized 10,12-pentacosadiynoic acid LB film and calcium carbonate crystals"Trans.Mater.Res.Soc.Jpn. 28. 521-523 (2003)
Y.Kumagai、K.Sato、N.Ozaki、T.Kogure、J.Tanaka:“聚合 10,12-二十五碳二炔酸 LB 膜和碳酸钙晶体之间的界面相互作用”Trans.Mater.Res.Soc.Jpn。
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- 影响因子:0
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T.Kogure: "Identification of polytypic groups in hydrous phyllosilicates using Electron Back-Scattering Patterns (EBSPs)"American Mineralogist. 87. 1678-1685 (2002)
T.Kogure:“使用电子背散射模式 (EBSP) 识别水合层状硅酸盐中的多型基团”美国矿物学家。
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- 影响因子:0
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- 通讯作者:
Y.Kumagai, K.Sato, N.Ozaki, T.Kogure, J.Tanaka: "Interfacial interactions between polymerized 10,12-pentacosadiynoic acid LB film and calcium carbonate crystals"Transactions of the Materials Research Society of Japan. 28. 521-523 (2003)
Y.Kumagai、K.Sato、N.Ozaki、T.Kogure、J.Tanaka:“聚合 10,12-二十五碳二炔酸 LB 膜与碳酸钙晶体之间的界面相互作用”日本材料研究会汇刊。
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KOGURE Toshihiro其他文献
KOGURE Toshihiro的其他文献
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{{ truncateString('KOGURE Toshihiro', 18)}}的其他基金
Investigation of the structure and assembly of inorganic macromolecules formed on the terrestrial surface
研究陆地表面形成的无机大分子的结构和组装
- 批准号:
17340160 - 财政年份:2005
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$ 1.98万 - 项目类别:
Grant-in-Aid for Scientific Research (B)
Investigation of the dissolution mechanism of silicate minerals at the atomic scale by using scanning probe microscopy
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- 批准号:
12640464 - 财政年份:2000
- 资助金额:
$ 1.98万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
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