- 1995-1998 Postdoctoral Research Associate, Aerosol Mass Spectrometry, Oak Ridge National Laboratory, J.M. Ramsey.
- 1992-1994 Postdoctoral Research Associate, Biological Mass Spectrometry, Indiana University, J.P. Reilly
- 1987-1992 Ph.D., Physical Chemistry, 1992, University of Illinois at Chicago, GPA 4.0/4.0, R.J. Gordon
Thesis: Photochemistry and Reaction Dynamics via Mass-Selected Multiphoton Ionization Spectroscopy
- 1981-1984 MS Physical Chemistry, University of Texas at Austin, J. M. White
- 1977-1981 BS Chemistry, University of Delaware, Newark, C. R. Dybowski
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Feb. 1998 to present: Staff Scientist, Oak Ridge National Laboratory. Research has involved: characterization of aerosols by mass spectrometry; development of aerosol-base MALDI of biomolecules in an ion trap; mass spectrometry of bacteria, chemical weapons agents, explosives; isotope mass spectral analysis of single airborne particles; analysis of the formation of elemental carbon by hydrocarbon pyrolysis, formation of carbon nanotubes and carbon composites; digital ion trap development; development of miniature ion trap mass spectrometers; development of methods and instrumentation to extend the working range of mass spectrometry out to the 109 Da range and beyond.
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- Koizumi, H., W.B. Whitten, P.T.A. Reilly, and E. Koizumi, Derivation of Mathematical Expressions to Define Resonant Ejection from Square and Sinusoidal Wave Ion Traps. International Journal of Mass Spectrometry, 2009. 286: p. 64-69
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- Koizumi, H., X. Wang, W.B. Whitten, and P.T.A. Reilly, Controlling the Expansion into Vacuum—the Enabling Technology for Trapping Atmosphere-Sampled Particulate Ions Journal of the American Society for Mass Spectrometry, 2009, 19(12): p. 1942-1947.
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- Koizumi, H., B. Jatko, and W.H.J. Andrews, A Novel Phase-Coherent Programmable Clock for High-Precision Arbitrary Waveform Generation Applied to Digital Ion Trap Mass Spectrometry. International Journal of Mass Spectrometry, 2010, 292: p. 23-31.
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- Koizumi, H., W.B. Whitten, P.T.A. Reilly, and E. Koizumi, The Effect of Endcap Electrode Holes on the Resonant Ejection from an Ion Trap. International Journal of Mass Spectrometry, 2008. 281(3): p. 108-114
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- Koizumi, H., W.B. Whitten, and P.T.A. Reilly, Trapping of Intact, Singly-Charged, Bovine Serum Albumin Ions Injected from the Atmosphere with a 10-cm Diameter, Frequency-Adjusted, Linear Quadrupole Ion Trap. Journal of the American Society for Mass Spectrometry, 2008. 19(12): p. 1942-1947.
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- Wasel, W., K. Kuwana, P.T.A. Reilly, and K. Saito, Experimental characterization of the role of hydrogen in CVD synthesis of MWCNTs. Carbon, 2007. 45(4): p. 833-838.
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- Harris, W.A., P.T.A. Reilly, and W.B. Whitten, Detection of chemical warfare-related species on complex aerosol particles deposited on surfaces using an ion trap-based aerosol mass spectrometer. Analytical Chemistry, 2007. 79(6): p. 2354-2358.
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- Reilly, P.T.A. and W.B. Whitten, The role of free radical condensates in the production of carbon nanotubes during the hydrocarbon CVD process. Carbon, 2006. 44(9): p. 1653-1660.
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