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Use of Amount-of-Substance Terminology and Equations in Field Desorption Theory
Topics in Catalysis ( IF 3.6 ) Pub Date : 2020-08-03 , DOI: 10.1007/s11244-020-01343-7
Richard G. Forbes

This note proposes that the theories of field evaporation and field desorption, as used in atom-probe microscopy and related atomic-level contexts, should be consistently formulated in terms of a set of “seven-dimensional (7-D)” formulae and equations that involve the physical quantity “amount of substance”, but make use of an atomic-level constant effectively equal to “one atom” (or, more generally, “one entity”). It is argued that the term “count” should be introduced as an alternative name (more suited to atomic-level contexts) for the quantity “amount of substance”. For field evaporation/desorption theories, relevant definitions and formulae are proposed, and compared with the “six-dimensional” system (based on the dimensionless quantity “number of atoms/entities”) sometimes used in the literature. Advantages of using a 7-D system are noted. It is argued that there is also an increasing need for a comprehensive system of official nomenclature for atomic-level constants and units, for all three of the extensive quantities “mass”, “electric charge” and “amount of substance”. It is also argued that, in the longer term, considerations of the kind being proposed here for field evaporation/desorption theories might usefully be applied more generally in atomic-level rate theory.



中文翻译:

物质解吸理论中物质术语和方程的使用

本说明建议,应使用一组“七维(7-D)”公式和方程式来统一表述原子探针显微镜和相关原子级环境中使用的场蒸发和场解吸理论。涉及物理量“物质的数量”,但使用的原子级常数有效地等于“一个原子”(或更普遍地,“一个实体”)。有人认为,应将“计数”一词作为数量“物质数量”的替代名称(更适合于原子级上下文)引入。对于现场蒸发/解吸理论,提出了相关的定义和公式,并与文献中有时使用的“六维”系统(基于无量纲的“原子/实体数”)进行了比较。注意了使用7D系统的优点。有人认为,对于原子量级的常数和单位,对于“质量”,“电荷”和“物质量”这三个广泛的量,也越来越需要一种正式的正式术语系统。也有人认为,从长远来看,这里提出的关于场蒸发/解吸理论的考虑可能会更有用地更广泛地应用于原子能级理论中。

更新日期:2020-08-03
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