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Related Experiment Videos

Microfabricated quadrupole ion trap for mass spectrometer applications.

S Pau1, C S Pai, Y L Low

  • 1The University of Arizona, Tucson, Arizona 85721, USA.

Physical Review Letters
|April 12, 2006
PubMed
Summary

Miniaturized quadrupole ion traps were fabricated on a chip for mass spectrometry. The array demonstrated mass-selective ion ejection and analysis of Xenon ions, examining scaling rules for device optimization.

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Area of Science:

  • Microfabrication
  • Mass Spectrometry
  • Analytical Chemistry

Background:

  • Miniaturization of analytical instruments is crucial for portable and high-throughput applications.
  • Quadrupole ion traps are fundamental components in mass spectrometry, enabling ion manipulation and analysis.
  • Developing on-chip mass spectrometers requires advanced microfabrication techniques.

Purpose of the Study:

  • To fabricate an array of miniaturized cylindrical quadrupole ion traps using silicon micromachining.
  • To demonstrate the functionality of the ion trap array for mass-selective ion ejection and analysis.
  • To investigate the scaling rules governing ion trap performance concerning pressure, voltage, and frequency.

Main Methods:

  • Fabrication of miniaturized cylindrical quadrupole ion traps (20 microm radius) using silicon micromachining with phosphorus-doped polysilicon and silicon dioxide.

Related Experiment Videos

  • Operation of the ion trap array for mass analysis.
  • Utilizing Xenon (Xe) ions for experimental validation at a pressure of 10(-4) Torr.

    • Main Results:

    • Successful fabrication of a miniaturized quadrupole ion trap array.
    • Demonstrated mass-selective ion ejection and mass analysis capabilities.
    • Acquired data on the scaling rules for ion trap operation under specific conditions.

    Conclusions:

    • The fabricated ion trap array shows promise for on-chip mass spectrometry.
    • Understanding scaling rules is essential for optimizing miniaturized mass spectrometers.
    • Further development can lead to integrated, portable mass analysis systems.