Morphology and Surface Structure of Silver Carboxylates
Morphology and Surface Structure of Silver Carboxylates
复制标题
羧酸银的形貌和表面结构
DOI：
10.1021/cg0600039
复制
发表时间：
2006
影响因子：
3.8
通讯作者：
C. Roost
中科院分区：
文献类型：
--
作者：
E. Aret;V. Volotchaev;S. Verhaegen;H. Meekes;E. Vlieg;G. Deroover;C. Roost
研究了月桂酸银、硬脂酸银和山嵛酸银的晶体形态。对于AgOOCnH₂ₙ₋₁（n为偶数），其晶体结构形成一个同系列。这些晶体只有在低过饱和度下生长时才在形态上同构。顶面的形态重要性取决于过饱和度以及碳链长度。利用原子力显微镜在分子尺度上研究了表面拓扑结构。对于所有晶面，都发现了一种二维成核与扩展机制。测量得到的表面结构结合分子可视化工具，使我们对这些羧酸银的生长和形状有了详细的了解。银 - 氧键主要决定了短链化合物的形态，而碳链的堆积对于长链化合物变得更为重要。银离子在表面的位置对于理解光热成像应用中的反应性具有重要意义。
The crystal morphology of silver laurate, silver stearate, and silver behenate is studied. The crystal structures form a homologous series for AgOOCnH2n-1 (for n = even). These crystals are morphologically only isomorphous when grown at low supersaturation. The morphological importance of the top facets depends on the supersaturation as well as on the carbon chain length. The surface topology is studied on a molecular scale with the use of atomic force microscopy. For all facets, a two-dimensional birth-and-spread mechanism is found. The measured surface structure combined with molecular visualization tools leads to a detailed understanding of the growth and shape of these silver carboxylates. The silver−oxygen bonds mainly determine the morphology of the short chain compounds, while the stacking of the carbon chains becomes more important for the long chain compounds. The position of the silver ions on the surface is relevant for understanding the reactivity in photothermographic applications.