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Writing with Mass-Selected Ions Using a Dynamic Field Wien Filter.

Michael F Espenship1, Julia Laskin1

  • 1James Tarpo Jr. and Margaret Tarpo Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States.

Journal of the American Society for Mass Spectrometry
|September 10, 2024
PubMed
Summary

Researchers developed a low-cost Wien filter for precise ion deposition. This device enables parallel, one-dimensional, and two-dimensional surface patterning of mass-selected ions for advanced interface fabrication.

Keywords:
Wien filterion soft-landingmass spectrometry

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Area of Science:

  • Physics
  • Materials Science
  • Surface Science

Background:

  • Ion soft-landing is crucial for fabricating interfaces with controlled molecular deposition.
  • Existing methods for patterning mass-selected ions can be complex and costly.

Purpose of the Study:

  • To design and implement a low-cost Wien filter for advanced ion surface patterning.
  • To demonstrate parallel deposition and one- and two-dimensional patterning of mass-selected ions.

Main Methods:

  • Construction of a Wien filter using strong permanent magnets.
  • Integration into an ion soft-landing instrument.
  • Application of dynamic electric fields (parallel and orthogonal to magnetic fields) for ion manipulation.

Main Results:

  • Successful separation of ions from a multicomponent, high-flux ion beam.
  • Simultaneous deposition of ions with different mass-to-charge ratios.
  • Demonstrated one-dimensional array patterning controlled by electric field parameters.
  • Achieved two-dimensional surface patterning while maintaining mass separation.

Conclusions:

  • The developed low-cost Wien filter is a practical tool for controlled ion deposition.
  • Enables versatile surface patterning of mass-selected ions for interface engineering.
  • Offers a cost-effective solution for fabricating complex ionic interfaces.