Crystal(编程语言)
表面粗糙度
表面光洁度
材料科学
吸附
结晶学
化学
矿物学
化学物理
复合材料
物理化学
计算机科学
程序设计语言
作者
Kenneth J. T. Livi,Mario Villalobos,Quentin M. Ramasse,Rik Brydson,Hugo Slavko Salazar-Rivera
出处
期刊:Langmuir
[American Chemical Society]
日期:2022-12-27
卷期号:39 (1): 556-562
被引量:4
标识
DOI:10.1021/acs.langmuir.2c02818
摘要
The capacity for crystals to adsorb elements and molecules is a function of the structures of their crystal faces and the relative proportions of those faces. More importantly, this study shows that the surface structure of crystal faces is affected by their surface roughness and is the dominant factor controlling the absorption site density. In a continuation of the study of synthetic goethites with varying single crystal size distributions, two more synthetic goethites with intermediate sizes were analyzed by Brunauer-Emmett-Teller (BET) and atomic-resolution scanning transmission electron microscopy (STEM) to determine the effects of crystal size on their shape, atomic-scale surface roughness, and ultimately on their total surface site density. Results show that surface roughness scales directly with the size [or inversely with the specific surface area (SSA)] of synthetic goethites in the SSA range of 40-75 m2/g. This surface roughness, in turn, increases the total site density over ideal atomically smooth crystals. The total site density of synthetic goethite increases from a combination of decreasing crystal length/width ratio and increasing surface roughness.
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