个人简介

Ph.D., University of Florida, 2001

研究领域

Analytical Chemistry

Chemical and Optical Properties of Atmospheric Aerosols Molecular Spectroscopy High-Speed Separations Applied to Environmental Analysis Novel Architectures for Chemical Separations Professor Thompson's research interests involve using modern optical and separation based techniques to study the composition and chemical transformations occurring within earth’s atmosphere. Often, these efforts are focused on understanding the chemical and optical characteristics of atmospheric particulate matter and trace gases. These analytes are known to adversely affect human health, decrease visibility, and alter earth's radiative balance. One recent effort has been the development of a device termed the aerosol albedometer. In this work, we have designed and constructed a device to simultaneously monitor aerosol scattering (bscat) and extinction coefficient (bext) at 532 nm. The ratio of these terms is known as the aerosol single scatter albedo (SSA) and is a key variable in assessing whether ambient particulate matter leads to a net warming or cooling of climate. Measuring the scattering and extinction coefficients of the background ambient aerosol can be analytically challenging since extinction coefficients are typically < 100 Mm-1 (% Trans. > 99.99% over a 1 m path). Therefore the techniques employed must be highly sensitive. In the future we hope to use this device in laboratory and field work to better understand how aerosol albedo varies as a function of chemical composition and mixing state. These efforts will include studies of the effect of chemical and physical transformations on the size and optical properties of various different aerosols and extraction of refractive index from measurements and application of Mie theory.

近期论文

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"Aerosol Albedometer: A Tool for Measuring Optical Scattering and Extinction of Dispersed Aerosols." Thompson, J.E., G.I.T. Laboratory Journal , 9-10, 2010. "Optical Properties of Aeolian Dusts Common to West Texas." Ma, L.; Hsieh, D.; Holder, D.; Zobeck, T.; C. Morgan, C.; Thompson, J.E., Aeolian Research 3, 235–242 , 2011. "Evaluation of a Quantitative Structure Property Relationship (QSPR) for Predicting Mid-Visible Refractive Index of Secondary Organic Aerosol (SOA)." Redmond, H. and J.E. Thompson, Phys. Chem. Chem. Phys., 2011, 13, 6872-6882, DOI: 10.1039/C0CP02270E "Characterization of a Novel Particle into Liquid Sampler for Analysis of Single Fluorescent Aerosol Particles Through Capillary Electrophoresis (CE)." Tang, H.; S. Hiemstra and J.E. Thompson, Analytica Chimica Acta702, (2011), 120–126. "Light Scattering & Absorption by Wind Blown Dust: Theory, Measurement and Recent Data." Redmond, H.; Dial, K.; Thompson, J.E.Aeolion Research, 2010, 2, 5– 26. "Characterization of Colored Oligomeric Products Formed During Irradiation of Aqueous Solutions Containing H2O2 and Phenolic Compounds." Chang, J.; Thompson, J.E. Atmos. Environ.2010, 44(4), 541-551. "Evaluation of microvolume regenerated cellulose (RC) microdialysis fibers for the sampling and detection of ammonia in air." Tang, H.; Thompson, J.E. Talanta, 2010, 81(4, 5), 1350-1356. "Simultaneous Measurement of Optical Scattering and Extinction on Dispersed Aerosol Samples." Dial, K.; Hiemstra, S.; Thompson, J.E. Anal. Chem. 2010, 82, 7885 – 7896. "Evaluation of a Quantitative Structure Property Relationship (QSPR) for Predicting Mid-Visible Refractive Index of Secondary Organic Aerosol (SOA)." Redmond, H.; Thompson, J.E. Phys. Chem. Chem. Phys., DOI:10.1039/C0CP02270E. "Development of a Fixed Frequency Aerosol Albedometer." Thompson, J.E.; DuVall, R.; Policarpio, D.; Barta, N.Optics Express, 2008, 16(3), 2191-2205. "Cavity Ring-Down Lossmeter Using a Pulsed Light Emitting Diode Source and Photon Counting" Thompson, J.E.; Myers, K. Meas. Sci.& Technol. 2007, 18(1), 147-154. "Tungsten Source Integrated Cavity Output Spectroscopy (W-ICOS) for the Determination of Ambient Atmospheric Extinction Coefficient" Thompson, J.E., Spangler, H. Applied Optics, 2006, 45(11), 2465-2473. "An Inexpensive Device for Capillary Electrophoresis (CE) with Fluorescence Detection" Thompson, J.E., Anderson, G.A., Shurrush, K. Journal of Chemical Education, 2006, 83(11), 1677 – 1680. "Atmospheric Aerosol Measurements by Cavity Ringdown Turbidimetry." Thompson, J.E.; Smith, B.W.; Winefordner, J.D. Aerosol Sci. and Tech., 2003, 37(3), 221-230. "Monitoring Atmospheric Extinction Through Cavity Ringdown Turbidity" Thompson, J.E.; Smith, B.W.; Winefordner, J.D. Anal. Chem., 2002, 74 (9), 1962 -1967. "Rapid Determination of Aspartate Enantiomers in Tissue Samples by Microdialysis Coupled On-Line with Capillary Electrophoresis." Thompson, J.E.; Vickroy, T.W.; Kennedy, R.T. Anal. Chem. 1999, 71, 2379-2384 "Optically Gated Capillary Electrophoresis of o-Pthaldialdehyde/β-Mercaptoethanol Derivatives of Amino Acids for Chemical Monitoring." Tao, L.; Thompson, J.E.; Kennedy, R.T. Anal. Chem. 1998, 70, 4015-4022