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Updated: Feb 7, 2026

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Vacuum Ultraviolet Laser Desorption/Ionization Mass Spectrometry Imaging of Single Cells with Submicron Craters

Jia Wang1, Zhaoying Wang2, Feng Liu1

  • 1Department of Physics and State Key Laboratory of Low-Dimensional Quantum Physics , Tsinghua University , Beijing 100084 , People's Republic of China.

Analytical Chemistry
|July 21, 2018
PubMed

Insights

A novel vacuum ultraviolet laser desorption/ionization (VUVDI) mass spectrometry imaging method offers submicron resolution for single-cell analysis. This technique achieves higher ion yields and less fragmentation than existing methods, enabling precise molecular identification.

Area of Science:

  • Analytical Chemistry
  • Biophysics
  • Life Sciences

Background:

  • Mass spectrometry imaging (MSI) is vital for label-free cellular localization.
  • Current methods like MALDI-TOF MS and ToF-SIMS have limitations in spatial resolution and molecular fragmentation.

Purpose of the Study:

  • To introduce a new MSI methodology, vacuum ultraviolet laser desorption/ionization (VUVDI).
  • To achieve submicron spatial resolution with reduced molecular fragmentation for single-cell analysis.

Main Methods:

  • Development and application of vacuum ultraviolet laser desorption/ionization (VUVDI) for MSI.
  • Simultaneous acquisition of fluorescence images and mass spectra.
  • Utilizing adjustable laser fluence for selective ion detection.

Main Results:

  • VUVDI achieved submicron spatial resolution, surpassing MALDI-TOF MS.
  • Demonstrated higher ion yields and significantly less molecular fragmentation compared to ToF-SIMS.
  • Enabled simultaneous imaging and spectral data acquisition with molecular identification capabilities.

Conclusions:

  • VUVDI is a promising MSI technique offering a soft ionization source and submicron resolution.
  • It provides enhanced molecular analysis capabilities for single cells in life science research.
  • The method facilitates precise localization and identification of molecules within cellular structures.

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