Journal Publications

Sub-parts-per-billion level detection of NO₂ using room temperature quantum-cascade lasers, Michael Pushkarsky, Alexei Tsekoun, Illya G. Dunayevskiy, Rowell Go and C. Kumar N. Patel, Proceedings of the National Academy of Sciences 103, 10846-10849

Improved performance of quantum cascade lasers through a scalable, manufacturable epitaxial-side-down mounting process, Alexei Tsekoun, Rowell Go, Michael Pushkarsky, Manijeh Razeghi and C. Kumar N. Patel, Proceedings of the National Academy of Sciences 103, 4831-4835

High-sensitivity high-selectivity detection of chemical warfare agents, Michael B. Pushkarsky, Michael E. Webber, Tyson Macdonald and C. Kumar N. Patel, Applied Physics Letters 88, 044103 (2006)

Optical detection of chemical warfare agents and toxic industrial chemicals: Simulation, Michael E. Webber, Michael B. Pushkarsky and C. Kumar N. Patel, Journal of Applied Physics 97, 113101 (2005)

Agricultural ammonia sensor using diode lasers and photoacoustic spectroscopy, Michael E. Webber, Tyson Macdonald, Michael B. Pushkarsky, C. Kumar N. Patel, Yongjing Zhao, Nichole Marcillac, and Frank M. Mitloehner, Institute of Physics Publishing, Meas. Sci. Technol. 16 (2005) 1547-1553

Sensitive Analysis of Breath Gases for "Bloodless Blood Tests", C. Kumar N. Patel, Gases and Technology, May/June 2002

Ultra-Sensitive Gas Detection Using Diode Lasers And Resonant Photoacoustic Spectroscopy, Michael E. Webber, Michael B. Pushkarsky and C. K. N. Patel, Diode Lasers and Applications in Atmospheric Sensing, Alan Fried, Editor, Proceedings of SPIE, Vol. 4817, 111—122 (2002).

Ultra-Sensitive Ambient Ammonia Detection Using CO2 Laser Based Photoacoustic Spectroscopy, M. B. Pushkarsky, M. E. Weber and C. K. N. Patel, Applied Physics B 77, 381-385 (2003).

Fiber-amplifier-enhanced photoacoustic spectroscopy with near-infrared tunable diode lasers, Michael E. Webber, Michael Pushkarsky, and C. Kumar N. Patel, Applied Optics 42(12), April 20, 2003, pp. 2119-2126.

Optical-nose technology competes with breath analyzers and blood tests,
C. Kumar Patel and Eric Mueller, Laser Focus World November, 2002

Laser-based photoacoustic ammonia sensor for industrial applications
M.B. Pushkarsky, M.E. Webber, O. Baghdassarian, L.R. Narasimhan. C.K.N.Patel,
Applied Physics B special issue: Trends in Laser Sources, Spectroscopic Techniques and Their Applications to Trace Gas Detection,
75 (2-3), 391-396, September 2002.

Sensitive Analysis of Breath gases for "Bloodless Blood Test"
C. Kumar N. Patel, Gases & Technology, Vol. 1, No. 3, 24-30, May/June 2002.

Correlation of breath ammonia with blood urea nitrogen and creatinine during hemodialysis L. R. Narasimhan, William Goodman, and C. Kumar N. Patel, Proceedings of the National Academy of Sciences 98, 4617-4621 (2001)

Conference Publications

Field Study: Intercomparison of Two Continuous Ammonia Monitors, D. Kenski, M.B. Pushkarsky, M.E. Webber, C.K.N. Patel, and P. Dasgupta, Ammonia Workshop , National Atmospheric Deposition Program's AmmoniaWorkshop, Washington, D.C., October 22-24, 2003.

Invited Presentations

High Sensitivity Photoacoustic Detection of Chemical Warfare Agents, Michael B. Pushkarsky, Michael C. Webber, Tyson Macdonald and C. Kumar N. Patel, Optically Based Biological and Chemical Sensing for Defence (SPIE Europe) London (October 25-28, 2004).

Optical Detection of Chemical Warfare Agents, Michael E. Webber, Michael B. Pushkarsky and C. Kumar N. Patel, Optically Based Biological and Chemical Sensing for Defence (SPIE Europe) London (October 25-28, 2004).

Photoacoustic Detection of Chemical Warfare Agents and Toxic Industrial Chemicals, C. Kumar N. Patel, 13th International Conference on Photoacoustic and Photothermal Phenomena, Rio de Janeiro, Brazil, (July 5-8, 2004).

Commercial laser-based photoacoustic gas sensors: from the lab to the marketplace , Michael E. Webber, Advanced Technology Seminar, Advanced Technology Division, National Center for Atmospheric Research, January 21, 2003.

Ultra-Sensitive Gas Detection Using Diode Lasers And Resonant Photoacoustic Spectroscopy , Michael E. Webber, Michael B. Pushkarsky and C. Kumar N. Patel, Diode Lasers and Applications in Atmospheric Sensing, Alan Fried, Editor,
Proceedings of SPIE, Vol. 4817 (2002), 111-122.

Patents

Diagnostic Method for High Sensitivity Detection of Component Concentrations in Human Gas Emissions
Patel et. al.
U.S. Patent 7,004,909 (February 28, 2006).

Alveolar Breath Collection Device
Ohan Baghdessarian
U.S. Patent 6,582,376 (June 24, 2003).

Automated Laser Wavelength Selection System and Method
Wiemeyer; Brian D.
U.S. Patent 6,658,032 (December 2, 2003).

Amplifier Enhanced Optical Analysis System and Method
Michael Evan Webber
U.S. Patent 7,064,329 (June 20, 2006).