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Related Experiment Videos

Desorption/ionization on silicon nanowires.

E P Go1, J V Apon, G Luo

  • 1Department of Molecular Biology and Center for Mass Spectrometry, Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, USA.

Analytical Chemistry
|March 15, 2005
PubMed
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Single-crystal silicon nanowires offer a sensitive platform for mass spectrometry, achieving attomole detection of biomolecules. This technology reduces laser energy needs and integrates separation with detection on one surface.

Area of Science:

  • Nanotechnology
  • Analytical Chemistry
  • Biomolecular Analysis

Background:

  • Dense arrays of single-crystal silicon nanowires (SiNWs) are explored for advanced analytical techniques.
  • Laser desorption/ionization mass spectrometry (LD-MS) is a key technique for analyzing biomolecules.

Purpose of the Study:

  • To evaluate SiNWs as a platform for sensitive LD-MS of various biomolecules.
  • To investigate the optimization of SiNWs for enhanced sensitivity and reduced interference.
  • To explore the integration of separation and mass spectrometry on SiNWs.

Main Methods:

  • Fabrication of dense single-crystal silicon nanowire arrays.
  • Optimization of laser energy, surface chemistry, and nanowire dimensions for LD-MS.
  • Analysis of small molecules, peptides, protein digests, and metabolites in biofluids.

Related Experiment Videos

  • Integration of chromatographic separation with mass spectrometric detection on SiNWs.

    • Main Results:

    • Achieved attomole-level sensitivity for biomolecule detection on SiNW surfaces.
    • Demonstrated lower laser energy requirements compared to porous silicon and MALDI, reducing background ions.
    • Successfully performed on-surface chromatographic separation followed by mass analysis.

    Conclusions:

    • SiNWs provide a highly sensitive and efficient platform for mass spectrometry.
    • The unique properties of SiNWs enable reduced energy consumption and background noise.
    • SiNWs offer a novel integrated solution for separation and detection in analytical chemistry.