Characterization of applied fields for ion mobility separations in traveling wave based structures for lossless ion manipulations (SLIM)
Ion mobility (IM) is rapidly gaining attention for the analysis of biomolecules due to the ability to distinguish the shapes of ions. However, conventional constant electric field drift tube IM has limited resolving power, constrained by practical limitations on the path length and maximum applied voltage. The implementation of traveling waves (TW) in IM removes the latter limitation, allowing higher resolution to be achieved using extended path lengths. These can be readily obtainable in structures for lossless ion manipulations (SLIM), which are fabricated from electric fields that are generated by appropriate potentials applied to arrays of electrodes patterned on two parallel surfaces. In this work we have investigated the relationship between the various SLIM variables, such as electrode dimensions, inter-surface gap, and the TW applied voltages, that directly impact the fields experienced by ions. Ion simulation and theoretical calculations have been utilized to understand the dependence of SLIM geometry and effective electric field. The variables explored impact both ion confinement and the observed IM resolution in Structures for Lossless Ion Manipulations (SLIM) modules.
- Research Organization:
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States). Environmental Molecular Sciences Lab. (EMSL)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC05-76RL01830
- OSTI ID:
- 1437536
- Report Number(s):
- PNNL-SA-127372; 48680; 49531; KP1601010
- Journal Information:
- International Journal of Mass Spectrometry, Vol. 430, Issue C; ISSN 1387-3806
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
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journal | October 2017 |
A simulation study of the influence of the traveling wave patterns on ion mobility separations in structures for lossless ion manipulations
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journal | January 2020 |
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