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A diffusionless transition in a normal alkane

机译:普通烷烃的无扩散过渡

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摘要

The normal alkanes are an interesting class of material, both in terms of their intrinsic properties and because many biological materials contain hydrocarbon domains. The normal alkanes often exhibit complicated phase behavior, with phase diagrams containing multiple solid phases. We report here a study of a curious pattern of twinned domains seen in one phase of tricosane (C_(23)H_(48)), which we have studied by X-ray diffraction, as well as by optical and atomic force microscopy. This pattern is seen in the rotator R_V phase, a monoclinic arrangement of tricosane molecules without orientational order. Transitions between this polymorph and the orthorhombic R_1 rotator phase lying at higher temperatures preserve features at the molecular level, and thus represent a diffusionless, martensitic-like transformation.
机译:就其固有性质而言,由于许多生物材料均含有烃结构域,因此正构烷烃是一类有趣的材料。普通烷烃通常表现出复杂的相行为,其相图包含多个固相。我们在这里报告了对在二十三​​烷(C_(23)H_(48))的一个相中看到的孪生结构域的奇怪模式的研究,我们已经通过X射线衍射以及光学和原子力显微镜对其进行了研究。在转子R_V相中可以看到这种模式,这是二十三烷分子的单斜排列,没有取向顺序。该多晶型物与处于较高温度的正交R_1旋转相之间的过渡在分子水平上保留了特征,因此代表了无扩散的马氏体样转变。

著录项

  • 来源
    《Journal of Crystal Growth》 |2009年第24期|4770-4777|共8页
  • 作者单位

    Department of Physics & Astronomy, The University of Western Ontario, London, ON, Canada N6A 3K7;

    Department of Physics & Astronomy, The University of Western Ontario, London, ON, Canada N6A 3K7 Department of Physics & Atmospheric Science, Dalhousie University, Halifax, NS, Canada B3H 3J5;

    Department of Earth Sciences, The University of Western Ontario, London, ON, Canada N6A 3K7;

    Department of Physics & Astronomy, The University of Western Ontario, London, ON, Canada N6A 3K7;

  • 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. Phase diagrams; A1. Surface structure; A1. Twinning; A1. X-ray diffraction; B1. Alkanes;

    机译:A1。原子力显微镜;A1。相图;A1。表面结构;A1。孪生;A1。 X射线衍射;B1。烷烃;

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