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首页> 外文期刊>Journal of Crystal Growth >Relation between etch-pit morphology and step retreat velocity on a calcite surface in aspartic acid solution
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Relation between etch-pit morphology and step retreat velocity on a calcite surface in aspartic acid solution

机译：天冬氨酸溶液中方解石表面刻蚀坑形貌与台阶后退速度之间的关系

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摘要

Effects of L-aspartic acid (L-Asp) on dissolution of calcite were investigated. The step retreat velocity and dissolution rate of calcite were measured simultaneously using an AFM flow-through system. The etch-pit morphology of calcite was observed using confocal laser scanning microscopy.rnResults show that the etch-pit morphologies changed drastically depending on the L-Asp concentration ([L-Asp]) in the order of rhomboidal, pentagonal, and triangular (not perfectly, but retaining an extra step). The change in obtuse step directions and appearance of the [010] step triggered these morphological changes. Addition of L-Asp accelerated all step retreats at [L-Asp] < 0.01 M, which implied the effect of L-Asp on the diffusive barrier. In contrast, at [L-Asp] > 0.01 M, L-Asp inhibited the retreats of obtuse steps and [010] step, although the retreat velocities of acute steps were constant irrespective of [L-Asp].rnThese results suggest that the directional changes and the inhibition of retreat velocities of obtuse steps were attributed to the generation of [411] and [451] steps caused by L-Asp. Moreover, we confirmed the preferential effects of L-Asp on the [481]_+ to [441]_± step edge, and proposed the preferential effects of L-Asp on the [411] to [451] step edge.
机译：研究了L-天冬氨酸（L-Asp）对方解石溶解的影响。使用AFM流通系统同时测量步骤的后退速度和方解石的溶解速率。共聚焦激光扫描显微镜观察到方解石的蚀坑形态。结果表明，随L-Asp浓度（[L-Asp]）的不同，蚀坑形态以菱形，五边形和三角形（不够完美，但保留了额外的步骤）。钝角方向和[010]步骤外观的变化触发了这些形态变化。 L-Asp的添加在[L-Asp] <0.01 M时加速了所有步退，这暗示了L-Asp对扩散屏障的影响。相反，在[L-Asp]> 0.01 M时，L-Asp抑制钝角台阶和[010]台阶的后退，尽管急性台阶的后退速度是恒定的，与[L-Asp]无关。方向变化和钝步后退速度的抑制归因于L-Asp导致的[411]和[451]步的产生。此外，我们确认了L-Asp对[481] _ +至[441] _±阶跃边缘的优先作用，并提出了L-Asp对[411]至[451]阶跃边缘的优先作用。

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  • 来源
    《Journal of Crystal Growth》 |2010年第9期|p.1590-1598|共9页
  • 作者

    Toru Yoshino; Hiroyuki Kagi; Natsumi Kamiya; Ryohei Kokawa;

  • 作者单位

    Geochemical Laboratory, Graduate School of Science, The University of Tokyo, 7-3-1 Hongou, Bunkyo-kuTokyo 113-0033, Japan;

    Geochemical Laboratory, Graduate School of Science, The University of Tokyo, 7-3-1 Hongou, Bunkyo-kuTokyo 113-0033, Japan;

    Department of Applied Chemistry, National Defense Academy of Japan, Kanagawa 239-8686, Japan;

    Analytical and Measuring Instruments Division, Shimadzu Corporation, Kanagawa 259-1304, Japan;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    A1. Atomic force microscopy; A1. Etching; A1. Surface structure; B1. Calcium compounds; B1. Minerals; B1. Organic compounds;

    机译：A1。原子力显微镜;A1。蚀刻;A1。表面结构;B1。钙化合物;B1。矿物质;B1。有机化合物;

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