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Design and Performance of a Soft-Landing Instrument for Fragment Ion Deposition.

Hugo Y Samayoa-Oviedo1, Kay-Antonio Behrend2, Sebastian Kawa2

  • 1Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States.

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|October 21, 2021
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Summary

Researchers developed a new electrospray ionization instrument for soft landing mass-selected ions. This enables studying gaseous ion reactions in condensed phases, creating unique ionic layers.

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Area of Science:

  • Mass spectrometry
  • Surface science
  • Chemical physics

Background:

  • Soft landing of ions is crucial for studying condensed-phase reactions.
  • Existing methods often lack the flux or control needed for detailed investigations.

Purpose of the Study:

  • To develop a novel high-flux electrospray ionization instrument for soft landing of mass-selected fragment ions.
  • To enable the study of gaseous ion reactivity on surfaces.

Main Methods:

  • Utilized electrospray ionization and collision-induced dissociation.
  • Employed a dual electrodynamic ion funnel assembly for ion focusing.
  • Implemented a high duty cycle for efficient ion deposition.

Main Results:

  • Achieved high-coverage deposition of mass-selected fragment ions at defined kinetic energies.
  • Demonstrated that ion structure and co-deposited species influence reactivity.
  • Confirmed the instrument's capability for producing high-purity ion fragments.

Conclusions:

  • The new instrument facilitates the investigation of gaseous ion reactivity in the condensed phase.
  • It provides a platform for creating unique ionic layers using ion fragments as building blocks.