Research Topics
| Neil M DonahueSummaryAffiliation: Carnegie Mellon University Country: USA Publications
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Detail Information
Publications
Secondary organic aerosol production from terpene ozonolysis. 1. Effect of UV radiationAlbert A Presto
Department of Chemistry and Department of Chemical Engineering, Doherty Hall, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
Environ Sci Technol 39:7036-45. 2005..These results implythat previous "dark bag" experiments may overestimate SOA generation from monoterpenes and also that SOA generation in the atmosphere may depend significantly on actinic flux...
Aging of biogenic secondary organic aerosol via gas-phase OH radical reactionsNeil M Donahue
Center for Atmospheric Particle Studies, Carnegie Mellon University, Pittsburgh, PA 15217, USA
Proc Natl Acad Sci U S A 109:13503-8. 2012..The mass increases are consistent with an existing gap between global SOA sources and those predicted in models, and can be described by a mechanism suitable for implementation in those models...- Critical factors determining the variation in SOA yields from terpene ozonolysis: a combined experimental and computational studyNeil M Donahue
Department of Chemistry and Chemical Engineering, Carnegie Mellon University, Pittsburgh PA 15213, USA
Faraday Discuss 130:295-309; discussion 363-86, 519-24. 2005..We suggest that SOA yields are likely to increase substantially through several generations of oxidative processing of the semi-volatile products... - Adventures in ozoneland: down the rabbit-holeNeil M Donahue
Center for Atmospheric Particle Studies, Carnegie Mellon University, Pittsburgh, USA
Phys Chem Chem Phys 13:10848-57. 2011.... 
Photo-oxidation of low-volatility organics found in motor vehicle emissions: production and chemical evolution of organic aerosol massMarissa A Miracolo
Departments of Mechanical Engineering and Chemical Engineering and Center for Atmospheric Particle Studies, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
Environ Sci Technol 44:1638-43. 2010....- Effective rate constants and uptake coefficients for the reactions of organic molecular markers (n-alkanes, hopanes, and steranes) in motor oil and diesel primary organic aerosols with hydroxyl radicalsAndrew T Lambe
Center for Atmospheric Particle Studies, Carnegie Mellon University, Pittsburgh, Pennsylvania, USA
Environ Sci Technol 43:8794-800. 2009..Based on our results, neglecting oxidation of molecular markers used for source apportionment could introduce significant error, since many common markers such as norhopane appear to be semivolatile under atmospheric conditions... - Secondary organic aerosol production from terpene ozonolysis. 2. Effect of NOx concentrationAlbert A Presto
Department of Chemistry and Department of Chemical Engineering, Doherty Hall, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
Environ Sci Technol 39:7046-54. 2005..We also present two-product model parameters to describe aerosol production from the alpha-pinene/0/NOx system under both high- and low-NOx conditions... - Intermediate-volatility organic compounds: a potential source of ambient oxidized organic aerosolAlbert A Presto
Center for Atmospheric Particle Studies, Carnegie Mellon University, Pittsburgh, Pennsylvania, USA
Environ Sci Technol 43:4744-9. 2009.... - Reactivity of oleic acid in organic particles: changes in oxidant uptake and reaction stoichiometry with particle oxidationAmy M Sage
Center for Atmospheric Particle Studies, Carnegie Mellon University, Pittsburgh, PA 15213, USA
Phys Chem Chem Phys 11:7951-62. 2009..It implies that there is additional, previously unrecognized secondary chemistry that likely involves the carbon backbone. Our understanding of reactivity, even in this simple system, remains incomplete... - Rethinking organic aerosols: semivolatile emissions and photochemical agingAllen L Robinson
Center for Atmospheric Particle Studies, Carnegie Mellon University, Pittsburgh, PA 15213, USA
Science 315:1259-62. 2007..Controlling organic particulate-matter concentrations will require substantial changes in the approaches that are currently used to measure and regulate emissions... - Secondary organic aerosol formation from high-NO(x) photo-oxidation of low volatility precursors: n-alkanesAlbert A Presto
Center for Atmospheric Particle Studies, Carnegie Mellon University, USA
Environ Sci Technol 44:2029-34. 2010..At higher C(OA), the mass spectrum was dominated by m/z 30, indicative of organic nitrates. The data support the conclusion that lower volatility organic vapors are important SOA precursors... - Organic aerosol formation from photochemical oxidation of diesel exhaust in a smog chamberEmily A Weitkamp
Center for Atmospheric Particle Studies, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, Pennsylvania 15213, USA
Environ Sci Technol 41:6969-75. 2007..The data provide strong evidence that the oxidation of a wide array of precursors that are currently not accounted for in existing models contributes to ambient SOA formation... - Laboratory measurements of the heterogeneous oxidation of condensed-phase organic molecular makers for meat cooking emissionsEmily A Weitkamp
Center for Atmospheric Particle Studies, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, Pennsylvania 15213, USA
Environ Sci Technol 42:5177-82. 2008..The results highlight that assumptions regarding the photochemical stability of molecular markers can lead to substantial biases in predictions of receptor models... - Volatility of organic molecular markers used for source apportionment analysis: measurements and implications for atmospheric lifetimeAndrew A May
Center for Atmospheric Particle Studies, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, Pennsylvania 15213, USA
Environ Sci Technol 46:12435-44. 2012..Therefore, both gas-particle partitioning and chemical reactions need to be accounted for when semivolatile molecular markers are used for source apportionment studies... - Simulations of smog-chamber experiments using the two-dimensional volatility basis set: linear oxygenated precursorsHeber J Chacon-Madrid
Center for Atmospheric Particle Studies, Carnegie Mellon University, Pittsburgh, PA 15213, USA
Environ Sci Technol 46:11179-86. 2012.... - Secondary organic aerosol formation from multiphase oxidation of limonene by ozone: mechanistic constraints via two-dimensional heteronuclear NMR spectroscopyChristina S Maksymiuk
Department of Chemistry, Carnegie Mellon University, Pittsburgh, PA, USA
Phys Chem Chem Phys 11:7810-8. 2009.... - Laboratory measurements of the heterogeneous oxidation of condensed-phase organic molecular makers for motor vehicle exhaustEmily A Weitkamp
Center for Atmospheric Particle Studies, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
Environ Sci Technol 42:7950-6. 2008..The results demonstrate that even modest levels of oxidation can alter policy-relevant conclusions about the total and relative contribution of gasoline and diesel vehicle emissions to ambient fine particle concentrations... - Secondary organic aerosol formation from intermediate-volatility organic compounds: cyclic, linear, and branched alkanesDaniel S Tkacik
Center for Atmospheric Particle Studies, Carnegie Mellon University, Pittsburgh, PA, USA
Environ Sci Technol 46:8773-81. 2012..Therefore, SOA from IVOCs may be an important contributor to urban OA and should be included in SOA models; the yield data presented in this study are suitable for such use... - Evaluating the mixing of organic aerosol components using high-resolution aerosol mass spectrometryLea Hildebrandt
Center for Atmospheric Particle Studies, Carnegie Mellon University, Pittsburgh, PA, USA
Environ Sci Technol 45:6329-35. 2011..At equilibrium, our results are consistent with pseudo-ideal mixing of anthropogenic and biogenic SOA components from these chemically dissimilar precursors... - Ozonolysis of beta-pinene: temperature dependence of secondary organic aerosol mass fractionRavikant Pathak
Center for Atmospheric Particle Studies, Carnegie Mellon University, Pittsburgh, PA, USA
Environ Sci Technol 42:5081-6. 2008..The parametrization predicts much higher SOA production for beta-pinene ozonolysis for typical atmospheric conditions than the values that have been suggested by previous studies... - Pressure dependence of stabilized Criegee intermediate formation from a sequence of alkenesGreg T Drozd
Center for Atmospheric Particle Studies, Carnegie Mellon University, Pittsburgh, Pennsylvania, United States
J Phys Chem A 115:4381-7. 2011..Stabilization for endocyclic alkenes, at atmospheric pressure, begins to occur at a carbon number of 10, with only modest yields of SCI... - Effect of NOx on secondary organic aerosol concentrationsTimothy E Lane
Department of Chemical Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
Environ Sci Technol 42:6022-7. 2008..A decrease of the average biogenic SOA by roughly 0.5 microg m(-3) is predicted for the southeast US for a 50% reduction in NOx emissions... - Controlled OH radical production via ozone-alkene reactions for use in aerosol aging studiesAndrew T Lambe
Center for Atmospheric Particle Studies, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
Environ Sci Technol 41:2357-63. 2007..04 +/-0.21... - Secondary organic aerosol formation from limonene ozonolysis: homogeneous and heterogeneous influences as a function of NO(x)Jieyuan Zhang
Center for Atmospheric Particle Studies, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
J Phys Chem A 110:11053-63. 2006..Although this chemistry is slower, it also yields products with low volatility. UV light suppresses production of the lowest volatility products, as we have shown in earlier studies of the alpha-pinene + ozone reaction... - Source apportionment of molecular markers and organic aerosol. 2. Biomass smokeAllen L Robinson
Department of Mechanical Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
Environ Sci Technol 40:7811-9. 2006..The marker-to-OC ratios of source profiles are critical parameters to consider when evaluating CMB solutions... - Ozonolysis of cyclic alkenes as surrogates for biogenic terpenes: primary ozonide formation and decompositionScott A Epstein
Center for Atmospheric Particle Studies, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
J Phys Chem A 114:7509-15. 2010..These kinetic computations were used to calculate a hydroxyl radical yield for 1-methyl-cyclohexene ozonolysis of 0.85 at 298 K... - Photochemical aging of α-pinene secondary organic aerosol: effects of OH radical sources and photolysisKaytlin M Henry
Center for Atmospheric Particle Studies, Department of Chemical Engineering, Carnegie Mellon University, 5000 Forbes Ave, Pittsburgh, Pennsylvania, 15213 United States
J Phys Chem A 116:5932-40. 2012..The photolysis rates are rapid, a few percent of the NO(2) photolysis frequency, and can thus be highly competitive with other aging mechanisms in the atmosphere... - Investigation of alpha-pinene + ozone secondary organic aerosol formation at low total aerosol massAlbert A Presto
Center for Atmospheric Particle Studies, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
Environ Sci Technol 40:3536-43. 2006..However, extrapolations of current models overestimate SOA production under illuminated, higher-NOx conditions typical of polluted regional air masses... - A semiempirical correlation between enthalpy of vaporization and saturation concentration for organic aerosolScott A Epstein
Center for Atmospheric Particle Studies, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
Environ Sci Technol 44:743-8. 2010..Knowledge of the relationship between C* and deltaH(VAP) constrains a free parameter in thermodenuder data analysis. A thermodenuder model using our deltaH(VAP) values agrees well with thermal behavior observed in laboratory experiments... - Updating the conceptual model for fine particle mass emissions from combustion systemsAllen L Robinson
Department of Mechanical Engineering, Center for Atmospheric Particle Studies, Carnegie Mellon University, Pittsburgh, PA 15213, USA
J Air Waste Manag Assoc 60:1204-22. 2010..This discussion highlights important linkages between primary and secondary PM, which could lead to simplified certification test procedures while capturing the emission components that contribute most to atmospheric PM mass... - Functionalization vs. fragmentation: n-aldehyde oxidation mechanisms and secondary organic aerosol formationHeber J Chacon-Madrid
Center for Atmospheric Particle Studies, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
Phys Chem Chem Phys 12:13975-82. 2010..We also measured SOA mass yields, which we compare with analogous n-alkanes to understand the effect of fragmentation on organic-aerosol formation... - 2,3-Dimethyl-2-butene (TME) ozonolysis: pressure dependence of stabilized Criegee intermediates and evidence of stabilized vinyl hydroperoxidesGreg T Drozd
Carnegie Mellon, University, Pittsburgh, Pennsylvania, USA
J Phys Chem A 115:161-6. 2011.... - Source apportionment of molecular markers and organic aerosol--1. Polycyclic aromatic hydrocarbons and methodology for data visualizationAllen L Robinson
Department of Mechanical Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
Environ Sci Technol 40:7803-10. 2006..Decay of PAHs will bias estimates of the gasoline-diesel split toward diesel emissions... - Secondary organic aerosol coating of synthetic metal-oxide nanoparticlesJoohyung Lee
Center for Atmospheric Particle Studies, Carnegie Mellon University, Pittsburgh, PA, USA
Environ Sci Technol 45:4689-95. 2011..This suggests that SOA condensational growth may be modeled based on the size distribution of the condensational sink in the atmosphere... - The HOOH UV spectrum: Importance of the transition dipole moment and torsional motion from semiclassical calculations on an ab initio potential energy surfaceGreg T Drozd
Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USAQuantum Theory Project, 2234 New Physics Building 92, P O Box 118435, Gainesville, Florida 32611 8435, USA
J Chem Phys 132:084304. 2010..Based on these initial findings for HOOH, photodissociation of large ROOH cannot be eliminated as an important factor for ozone and particulate matter production seen in both ambient and laboratory studies... - Aging of organic aerosol: bridging the gap between laboratory and field studiesYinon Rudich
Department of Environmental Sciences, Weizmann Institute, Rehovot 76100, Israel
Annu Rev Phys Chem 58:321-52. 2007....