Niedziela, Richard F. - DePaul University

研究领域

Richard Niedziela's research focuses on the optical properties of organic molecules with an emphasis on those compounds that are present in the lower troposphere. One part of his research program involves the retrieval of optical constants, or complex refractive indices, of organic materials. These frequency-dependent quantities, when coupled with an appropriate optical model, can be used to determine the extent to which light is either absorbed by the material or refracted by it. Another part of Niedziela's research program utilizes the optical constants mentioned above to develop analytical techniques to measure physical properties of organic-containing aerosols. Such particles are prevalent in the lower troposphere, particularly in urban ares. As such, these particles can have a significant local impact on air quality and visibility. Spectroscopic techniques can be used on an ensemble of organic-containing aerosols to determine, amongst other things, their size distribution, shape, and phase. All of these physical parameters are important inputs to efforts to model chemistry in the lower regions of the atmosphere.

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Mid-infrared complex refractive indices for oleic acid and optical properties of model oleic acid/water aerosols, S.M. McGinty, M.K. Kapala, and R.F. Niedziela,Physical Chemistry Chemical Physics, 11, 7998, (2009). DOI: 10.1039/b905371a Electron-Atom Superelastic Scattering in Magnesium at Millielectron Volt Energies, T. Baynard, A.C. Reber, R.F. Niedziela, S.A. Darveau, B. Prutzman, and R.S. Berry,Journal of Physical Chemistry A, 111(49), 12487, (2007). DOI: 10.1021/jp075583e Infrared Optical Constants for Carvone from the Mie Inversion of Aerosol Extinction Spectra, M.T. Dohm, A.M. Potscavage, and R.F. Niedziela, Journal of Physical Chemistry A, 108(25), 5365, (2004). DOI: 10.1021/jp0365559 Infrared Complex Refractive Indices for Nopinone, M.T. Dohm and R.F. Niedziela,Geophysical Research Letters, 31, L14109, (2004). DOI: 10.1029/2004GL019737