Steven J. Ray


Steven Ray.

Steven J. Ray


Steven J. Ray


Research Interests

Analytical Chemistry, Mass Spectrometry, and Chemical Instrumentation: Distance-of-Flight Mass Spectrometry, Soft-landing Mass Spectrometry, Novel Detector Platforms for Mass Spectrometry, New Mass Spectrometry Instrumentation and Ionization Sources, Atomic Spectrometry, Plasma Spectrochemistry


  • PhD, Indiana University, 2003
  • BS, Hope College, Holland, MI

Awards and Honors

  • Young Spectrochemist Award, Winter Conference on Plasma Spectrochemistry (2016).
  • Analytical and Bioanalytical Chemistry Best Paper Award (2014) “Zoom-TOFMS: addition of a constant-momentum-acceleration “zoom” mode to time-of-flight mass spectrometry.”, Anal. Bioanal. Chem., 406(29), 7419-30 (2014).
  • Lester Strock Medal, Society for Applied Spectroscopy (2014).
  • American Society for Mass Spectrometry Ron Hites Award for Best Manuscript (2013): “First distance-of-flight instrument: opening a new paradigm in mass spectrometry”, J. Am. Soc. Mass Spectrom., 22(1), 110-117, (2011).
  • R&D100 Award, “Array Detector Technology for Mass Spectrometry”, R&D Magazine (2011).


Novel Instrumentation and Methodologies for Analytical Chemistry.  Distance-of-Flight Mass Spectrometry and Time-of-Flight Mass Spectrometry Techniques and Instrumentation.  New Detector Technologies for Mass Spectrometry. Soft-landing Mass Spectrometry. Novel Plasma Novel Ionization Sources for Mass Spectrometry. Atomic Spectrometry Techniques.

Research Summary

Our laboratory focuses on the development of new instrumental and methodologies to advance analytical chemistry, predominantly in the area of mass spectrometry.  The development of A new measurement capability, or the marked improvement of an existing technique, can profoundly affect other areas of scientific exploration and generate new scientific discoveries.

Current Research areas are:

  • Distance-of-Flight Mass Spectrometry.
  • Solid-State Detector Arrays for Mass Spectrometry.
  • Soft-Landing Mass Spectrometry.
  • Atomic Spectrometry.
  • New Ionization Sources for Mass Spectrometry.
  • Novel Plasma Systems for Atomic Spectrometry.
  • Metallomics Analysis by Parallel Atomic and Molecular Mass Spectrometry.

Selected Recent Publications

  • Hazel, N.; Orejas, J.; Ray, S., Modulation of the solution-cathode glow-discharge and solution-anode glow discharge using a rotating magnetic field. Journal of Applied Physics 2021, 129 (18), 183301. (
  • Orejas, J.; Hazel, N.; Ray, S. J., The solution cathode glow discharge in slow motion: Characterization of glow discharge filament structure and droplet ejection using a rectangular capillary. Spectrochimica Acta Part B: Atomic Spectroscopy 2021, 106209. (
  • Williams, K. L.; Chan, G. C. Y.; Ray, S. J., The use of a digital micromirror array as a temporal gate and spatial-filtering device for laser-induced breakdown spectroscopy and laser ablation molecular isotopic spectrometry. Spectrochimica Acta Part B: Atomic Spectroscopy 2021, 179, 106116. (
  • Hazel, N.; Orejas, J.; Ray, S. J., Evaluation of solution-cathode glow discharge atomic emission spectrometry for the analysis of nanoparticle containing solutions. Spectrochimica Acta Part B: Atomic Spectroscopy 2021, 176, 106040. (
  • Brais, C. J.; Ibañez, J. O.; Schwartz, A. J.; Ray, S. J., RECENT ADVANCES IN INSTRUMENTAL APPROACHES TO TIME-OF-FLIGHT MASS SPECTROMETRY. Mass Spectrometry Reviews 2020. (
  • Rivera-Albarran, M. E.; Ray, S. J., A Novel Combined Microstrip Resonator/Nanospray Ionization Source for Microwave-Assisted Trypsin Digestion of Proteins. Journal of the American Society for Mass Spectrometry 2020, 31 (8), 1684-1696. (