Electric field dependence of the ion mobility
Electric field dependence of the ion mobility
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DOI：
10.1016/j.ijms.2009.05.009
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发表时间：
2009-08-15
影响因子：
1.8
通讯作者：
Nazarov, E. G.
中科院分区：
文献类型：
--
作者：
Krylov, E. V.;Nazarov, E. G.
迁移率与电场的关系(微分迁移率谱中的α函数)是用于分离和表征DMS中气相离子的一种独特的离子性质。本研究旨在确定这种场依赖的起源。提出了几个模型来解释典型实验条件下的场迁移率依赖关系和α函数行为。在每个模型的框架中计算的Alpha函数的性质与实验数据进行了比较。分析了理论和实验之间的定性和定量相关性，以证明每个模型的有效性。我们的研究表明，掺杂和漂移气体分子的聚集是解释所观察到的现象的最相关的假说。聚团模型可以作为进一步研究的基础，旨在通过漂移气体的修饰来显著提高DMS的分辨率。(C)2009爱思唯尔B.V.保留所有权利。
The dependence of mobility on electric field (the alpha function in differential mobility spectrometry, DMS) is a unique ion property used for separation and characterization of gas-phase ions in DMS. This study was conducted to determine the origin of this field dependence. Several models are suggested to rationalize the field mobility dependence and explain the alpha function behavior under typical experimental conditions. Alpha function properties, calculated in the framework of each model, are compared with experimental data. Qualitative and quantitative correlations between theory and experiment are analyzed as a proof of the validity of each model. Our examination reveals that clustering with dopant and drift gas molecules is the most relevant hypothesis explaining the observed phenomena. A clustering model can serve as a basis for further investigations aimed at significantly increasing DMS resolution by drift gas modification. (C) 2009 Elsevier B.V. All rights reserved.