Publications

  1.  Patrick Roth, Jiacheng Yang, Weihan Peng, David Cocker,Thomas Durbin, Akua Asa-Awuku,Georgios Karavalakis; Intermediate and High Ethanol Blends Reduce Secondary Organic Aerosol Formation from Gasoline Direct Injection Vehicles, Atmospheric Environment, https://doi.org/10.1016/j.atmosenv.2019.117064
  2. Vu, D., Gao, S., Berte, T., Kacarab, M., Yao, Q., Vafai, K., and Asa-Awuku, A.: External and Internal CCN Mixtures: Controlled Laboratory Studies of Varying Mixing States, Atmospheric Measurement Techniques 12.8 (2019): 4277-4289., https://doi.org/10.5194/amt-2018-429,
  3. Barati, Farima, Qi Yao, and Akua Asa-Awuku. “Insight into the role of water-soluble organic solvents for the Cloud Condensation Nuclei activation of cholesterol.” ACS Earth and Space Chemistry. 39.(2019). 1697-1705. https://doi.org/10.1021/acsearthspacechem.9b00161
  4. Jiacheng Yang; Patrick Roth, Thomas D Durbin, Martin M Shafer, Jocelyn Hemming, Dagmara Antkiewicz, Akua Asa-Awuku, Georgios Karavalakis. “Emissions from a Flex Fuel GDI Vehicle Operating on Ethanol Fuels Show Marked Contrasts in Chemical, Physical and Toxicological Characteristics as a Function of Ethanol Content”. Science of the Total Environment, https://doi.org/10.1016/j.scitotenv.2019.05.279
  5. Vu, Diep, Patrick Roth, Tyler Berte, Jiacheng Yang,David R. Cocker, Thomas D. Durbin, Georgios Karavalakis, and Akua Asa-Awuku. “Using a new Mobile Atmospheric Chamber (MACh) to investigate the formation of secondary aerosols from mobile sources: The case of gasoline direct injection vehicles.”Journal of Aerosol Science (2019). 133, 1-11. https://doi.org/10.1016/j.jaerosci.2019.03.009
  6. Roth, Patrick, Jiacheng Yang, Emmanuel Fofie, David R. Cocker, Thomas D. Durbin, Rasto Brezny, Michael Geller, Akua Asa-Awuku, and Georgios Karavalakis. “Catalyzed Gasoline Particulate Filters Reduce Secondary Organic Aerosol Production from Gasoline Direct Injection Vehicles.” Environmental science & technology (2019). https://pubs.acs.org/doi/abs/10.1021/acs.est.8b06418
  7. Yang, J. , Roth, P., Ruehl, CR. Shafer, MM., Antkiewicz, DS., Durbin, T.D., Cocker, D.R., Asa-Awuku, A. and G. Karavalakis. “Physical, chemical, and toxicological characteristics of particulate emissions from current technology gasoline direct injection vehicles.” Science of the Total Environment. 650 (2019): 1182-1194. https://doi.org/10.1016/j.scitotenv.2018.09.110
  8. Yang, Jiacheng, Patrick Roth, Thomas D. Durbin, Kent C. Johnson, Akua Asa-Awuku, David R. Cocker III, and Georgios Karavalakis. “Investigation of the Effect of Mid-And High-Level Ethanol Blends on the Particulate and the Mobile Source Air Toxic Emissions from a Gasoline Direct Injection Flex Fuel Vehicle.” Energy & Fuels 33, no. 1 (2019): 429-440. doi:10.1021/acs.energyfuels.8b02206  https://pubs.acs.org/doi/abs/10.1021/acs.energyfuels.8b02206
  9. Lin, Y., Bahreini, R.,  Zimmerman, S.,  Fofie, E. A., Asa-Awuku,  A.,  Park, K.,  Lee, S-B.,  Bae, G-N.  and H. S. Jung. “Investigation of ambient aerosol effective density with and without using a catalytic stripper.” Atmospheric Environment (2018). 187, 84-92  https://doi.org/10.1016/j.atmosenv.2018.05.063
  10. Jiang, J., Yang, J., Gagné, S., Chan, T. W., Thomson, K., Fofie, E., Cary, R. A.,Dan Rutherford, D., Bryan Comer,B., Jacob Swanson, J., Lin, Y. Van Rooy, P, Asa-Awuku, A. ,Jung, H., Barsanti, K., Karavalakis. G, David Cocker, D., Durbin, T. D., Miller, J. W., K. C. Johnson. Sources of variance in BC mass measurements from a small marine engine: Influence of the instruments, fuels and loads. Atmospheric Environment. 182 (2018): 128-137.  https://doi.org/10.1016/j.atmosenv.2018.03.008
  11. Yang, J., Roth, P., Durbin, T.D., Johnson, K.C., Cocker, D.R., Asa-Awuku, A., Brezny, R., Geller, M. and Karavalakis, G., 2018. Gasoline Particulate Filters as an Effective Tool to Reduce Particulate and PAH Emissions from GDI Vehicles: A Case Study with Two GDI Vehicles. Environmental science & technology. (2018). 52 (5), pp 3275–3284. 10.1021/acs.est.7b05641 https://pubs.acs.org/doi/full/10.1021/acs.est.7b05641
  12. Fofie, E. A., Donahue, N. M., & Asa-Awuku, A. (2018). Cloud condensation nuclei activity and droplet formation of primary and secondary organic aerosol mixtures. Aerosol Science and Technology, 52(2), 242-251. https://doi.org/10.1080/02786826.2017.1392480
  13. Vizenor, A., & Asa-Awuku, A. Gas-phase kinetics modifies the CCN activity of biogenic SOA. Physical Chemistry Chemical Physics. no. 9 (2018), 6591-6597. (Online)
  14. Fofie, E., V. Castelluccio, and A. Asa-Awuku. “Exploring CCN Droplet Suppression with a Higher Sensitivity Optical Particle Counter.” Aerosol Science and Technology (2018): 52, no.1, 78-86. http://dx.doi.org/10.1080/02786826.2017.1379592.
  15. Short, Daniel, Diep Vu, Vincent Chen, Carlos Espinoza, Tyler Berte, Georgios Karavalakis, Thomas D Durbin, and Akua Asa-Awuku. “Understanding Particles Emitted from Spray and Wall-Guided Gasoline Direct Injection and Flex Fuel Vehicles Operating on Ethanol and Iso-Butanol Gasoline Blends.” Aerosol Science and Technology 51, no. 3 (2017): 330-41. http://dx.doi.org/10.1080/02786826.2016.1265080
  16. Vu, Diep, Daniel Short, Georgios Karavalakis, Thomas D Durbin, and Akua Asa-Awuku. “Will Aerosol Hygroscopicity Change with Biodiesel, Renewable Diesel Fuels and Emission Control Technologies?” Environmental science & technology 51, no. 3 (2017): 1580-86. http://dx.doi.org/10.1021/acs.est.6b03908.
  17. Piqueras, P, F Li, V Castelluccio, M Matsumoto, and A Asa-Awuku. “Real-Time Ultrafine Aerosol Measurements from Wastewater Treatment Facilities.” Environmental science & technology 50, no. 20 (2016): 11137-44. http://dx.doi.org/10.1021/acs.est.6b02684.
  18. Clark, Christopher H., Mary Kacarab, Shunsuke Nakao, Akua Asa-Awuku, Kei Sato, and David R. Cocker. “Temperature Effects on Secondary Organic Aerosol (Soa) from the Dark Ozonolysis and Photo-Oxidation of Isoprene.” Environmental science & technology 50, no. 11 (2016/06/07 2016): 5564-71. http://dx.doi.org/10.1021/acs.est.5b05524.
  19. Giordano, Michael R, Joey Chong, David R Weise, and Akua A Asa-Awuku. “Does Chronic Nitrogen Deposition During Biomass Growth Affect Atmospheric Emissions from Biomass Burning?” Environmental Research Letters 11, no. 3 (2016): 034007.  http://dx.doi.org/10.1088/1748-9326/11/3/034007
  20. Vu, D, D Short, G Karavalakis, TD Durbin, and A Asa-Awuku. “Integrating Cloud Condensation Nuclei Predictions with Fast Time Resolved Aerosol Instrumentation to Determine the Hygroscopic Properties of Emissions over Transient Drive Cycles.” Aerosol Science and Technology 49, no. 11 (2015): 1149-59. http://dx.doi.org/10.1080/02786826.2015.1105358.
  21. Asa-Awuku, Akua, Armin Sorooshian, Richard C Flagan, John H Seinfeld, and Athanasios Nenes. “Ccn Properties of Organic Aerosol Collected Below and within Marine Stratocumulus Clouds near Monterey, California.” Atmosphere 6, no. 11 (2015): 1590-607. http://dx.doi.org/10.3390/atmos6111590.
  22. Karavalakis, George, Daniel Short, Diep Vu, Robert Russell, Akua Asa-Awuku, and Thomas Durbin. “A Complete Assessment of the Emissions Performance of Ethanol Blends and Iso-Butanol Blends from a Fleet of Nine Pfi and Gdi Vehicles.” SAE International Journal of Fuels and Lubricants 8, no. 2 (2015): 374-95. http://dx.doi.org/10.4271/2015-01-0957.
  23. Karavalakis, Georgios, Daniel Short, Diep Vu, Robert Russell, Maryam Hajbabaei, Akua Asa-Awuku, and Thomas D. Durbin. “Evaluating the Effects of Aromatics Content in Gasoline on Gaseous and Particulate Matter Emissions from Si-Pfi and Sidi Vehicles.” Environmental science & technology 49, no. 11 (2015/06/02 2015): 7021-31. http://dx.doi.org/10.1021/es5061726.
  24. Karavalakis, Georgios, Daniel Short, Diep Vu, Robert L. Russell, Akua Asa-Awuku, Heejung Jung, Kent C. Johnson, and Thomas D. Durbin. “The Impact of Ethanol and Iso-Butanol Blends on Gaseous and Particulate Emissions from Two Passenger Cars Equipped with Spray-Guided and Wall-Guided Direct Injection Si (Spark Ignition) Engines.” Energy 82, no. Supplement C (2015/03/15/ 2015): 168-79. http://dx.doi.org/https://doi.org/10.1016/j.energy.2015.01.023.
  25. Short, Daniel, Diep Vu, Thomas D. Durbin, Georgios Karavalakis, and Akua Asa-Awuku. “Particle Speciation of Emissions from Iso-Butanol and Ethanol Blended Gasoline in Light-Duty Vehicles.” Journal of Aerosol Science 84 (2015): 39-52. http://dx.doi.org/10.1016/j.jaerosci.2015.02.010.
  26. Short, Daniel Z., Diep Vu, Thomas D. Durbin, Georgios Karavalakis, and Akua Asa-Awuku. “Components of Particle Emissions from Light-Duty Spark-Ignition Vehicles with Varying Aromatic Content and Octane Rating in Gasoline.” Environmental science & technology 49, no. 17 (2015/09/01 2015): 10682-91. http://dx.doi.org/10.1021/acs.est.5b03138.
  27. Xue, Jian, Yang Li, Xiaoliang Wang, Thomas D. Durbin, Kent C. Johnson, Georgios Karavalakis, Akua Asa-Awuku, Mark Villela, David Quiros, Shaohua Hu, Tao Huai, Alberto Ayala, and Heejung S. Jung. “Comparison of Vehicle Exhaust Particle Size Distributions Measured by Smps and Eeps During Steady-State Conditions.” Aerosol Science and Technology 49, no. 10 (2015/10/03 2015): 984-96. http://dx.doi.org/10.1080/02786826.2015.1088146.
  28. Giordano, M., Espinoza, C., Asa-Awuku, A. 2014. Experimentally measured morphology of biomass burning aerosol and its impacts on CCN ability. Atmos. Chem. Phys. Discuss., 14, 12555-12589, doi:10.5194/acpd-14-12555-2014, 2014 (Online)
  29. Tan, C. L. C., Gao, S. Wee, B. S.,  Asa-Awuku, A. and  B. J. Thio, Adhesion of Dust Particles to Common Indoor Surfaces in Air-Conditioned Environment. Aerosol Science and Technology. Vol. 48: 5 p.541-551. , doi: 10.1080/02786826.2014.898835, 2014 (Online)
  30. X. Tang, D. Price, E. Praske, D. Vu, K. Purvis-Roberts, P. J. Sliva, D. R. Cocker, and A. Asa-Awuku. CCN Activity of Two Aliphatic Amine Secondary Aerosol. Atmospheric Chemistry and Physics. 5959-5967, doi:10.5194/acp-14-5959-2014, 2014(Online)
  31. Short, D. Z.,  M. R. Giordano,Y. Zhu, P. M. Fine, A. Polidori and A. Asa-Awuku.  A Unique On-line Method tto Water-Insoluble Particle Contributions. Aerosol Science and Technology. Vol. 48: 7 p.706-714. 9p, doi;10.1080/02786826.2014.916778, 2014 (Online)
  32. Karavalakis, G., Short, D., Vu, D., Villela, M., Asa-Awuku, A., Durbin, T. Evaluating the regulated emissions, air toxics, ultrafine particles, and black carbon from SI-PFI and SI-DI vehicles operating on different ethanol and iso-butanol blends.Fuel. Vol. 128: p.410-421., 2014 (Online)
  33. Giordano, M., Asa-Awuku, A. Rebuttal to Correspondence on “Changes in Droplet Surface Tension Affect the Observed Hygroscopicity of Photochemically Aged Biomass Burning Aerosol”. Env. Sci. & Tech. Vol. 48: 3 p.2084-2085, doi:10.1021/es405374r, 2014 (Online)
  34. Kreidenweis, S.M and A. Asa-Awuku.  Aerosol Hygroscopcity: Particle Water Content and its Role in Atmospheric Processes, Treatise on Geochemistry 2nd Edition. Editors: H. D. Holland, K.K. Turekian. Elseiver. Oxford. Vol. 5: p.331-361, 2014 (Online)
  35. Clark, C. H. , S. Nakao, A. Asa-Awuku, K. Sato, and D. R. Cocker. Real-time study of particle-phase products from α-pinene ozonolysis and isoprene photo-oxidation using particle into liquid sampling directly coupled to a time of flight mass spectrometer (PILS-ToF), Aerosol Sci. & Tech., 47 (12), doi: 10.1080/02786826.2013.844333, 2013 (Online)
  36. Giordano, M. R., D. Z. Short, E. Hosseini, W. Lichtenberg, and  A. Asa-Awuku. Changes in Droplet Surface Tension Affect the Observed Hygroscopicity of POnlinehotochemically Aged Biomass Burning Aerosol. Env. Sci. & Tech.doi:10.1021/es401867j, 2013 (Online).
  37. Tang, X., D. Price, E. Praske, S. A. Lee, M. A. Shattuck, K. Purvis-Roberts, P. Silva, A. Asa-Awuku, and D. R. Cocker III. NO3radical, OH radical and O3– initiated secondary aerosol formation from aliphatic amines- salt formation and the effect of water vapor. Atmos. Environ. 72, 105–112, 2013 (Online
  38. S. Nakao, P. Tang, X.Tang, C. H. Clark, L. Qi, E. Seo, A. Asa-Awuku, D. R. Cocker III. Density and elemental ratios of secondary organic aerosol: application of a density prediction method. Atmos.Environment, 68,  273 -277, 2013 (Online)
  39. Tang, X., Cocker III, D. R., and Asa-Awuku, A.: Are sesquiterpenes a good source of secondary organic cloud condensation nuclei (CCN)? Revisiting β-caryophyllene CCN, Atmos. Chem. Phys., 12, 8377-8388, doi:10.5194/acp-12-8377-2012, 2012.(Online)
  40. M. Y. Khan, M. Giordano , J. Gutierrez, W. A. Welch, A. Asa-Awuku, J. W. Miller, D. R. Cocker III, Benefits of Two Mitigation Strategies for Container Vessels: Cleaner Engines and Cleaner Fuels, Environmental Science and Technology. Environ. Sci. Technol., 2012, 46 (9), pp 5049–5056 DOI: 10.1021/es2043646 (Online)
  41. Tang, X.,  Z. Zheng, H S. Jung, A. Asa-Awuku. The Effects of Mainstream and Sidestream Environmental Tobacco Smoke Composition for Enhanced Condensational Droplet Growth by Water Vapor. Aerosol Science and Technology, Vol. 46, Iss. 7, 2012 (Online)
  42. Asa-Awuku, A.,  R. Moore, A. Nenes, R. Bahreini, C. A. Brock, A. Middlebrook, J. Holloway , T. Ryerson, J. Jimenez, P. DeCarlo , A. Hecobian, R. Weber , D. Tanner , R. Stickel and L. G. Huey ”Airborne Cloud Condensation Nuclei Measurements during the 2006 Texas Air Quality Study” J. Geophys. Res., 116, D11201, doi:10.1029/2010JD014874.  (Online)
  43. Zheng, Z., X. Tang, A. Asa-Awuku, H. Jung, Characterization of a Method for Aerosol Generation from Heavy Fuel Oil (HFO) as an Alternative to Emissions from Ship Diesel Engines, Journal of Aerosol Science, 41(12), 1143-1151, 2010 (Online)
  44. Asa-Awuku, A., Nenes, A., Gao, S., Flagan, R. C., and Seinfeld, J. H.: Water-soluble SOA from Alkene ozonolysis: composition and droplet activation kinetics inferences from analysis of CCN activity, Atmos. Chem. Phys., 10, 1585-1597, 2010. (Online)
  45. Asa-Awuku, A., M. A. Miracolo, J. H. Kroll, A. L. Robinson, and N. M. Donahue,  Mixing and phase partitioning of primary and secondary organic aerosols, Geophys. Res. Lett., 36, L15827, doi:10.1029/2009GL039301, 2009 (Online)
  46. Asa-Awuku, A., G. J. Engelhart., B.H. Lee, S.N. Pandis and   A. Nenes, Relating CCN activity, volatility, and droplet growth kinetics of β-caryophyllene secondary organic, Atmospheric Chemistry and Physics, 9, 795-812, 2009 (Online)
  47. Engelhart G. J., A. Asa-Awuku, A. Nenes and S. N. Pandis,  CCN activity and droplet growth kinetics of fresh and aged monoterpene secondary organic aerosol, Atmospheric Chemistry and Physics, 8, 3937-3949, 2008 (Online)
  48. Asa-Awuku, A., A. P. Sullivan,  C.J. Hennigan, R. J. Weber and A. Nenes, Investigation of Molar Volume and Surfactant Characteristics of water-soluble Organic Compounds in Biomass Burning Aerosol, Atmospheric Chemistry and Physics, 8, 799-812, 2008 (Online)
  49. Padró, L.T., A. Asa-Awuku, R. Morisson,  and A. Nenes, Inferring Thermodynamic Properties from CCN Activation Experiments a) Single-component and Binary Aerosols, Atmospheric Chemistry and Physics, 7, 5263-5274 , 2007 (Online)
  50. Asa-Awuku, A., and A. Nenes (2007), Effect of solute dissolution kinetics on cloud droplet formation: Extended Koehler theory, Journal of Geophysical. Research., 112, D22201, 2007  doi:10.1029/2005JD006934 (Online)

 

   Conference Papers:

  1.  Karavalakis, George, Daniel Short, Diep Vu, Robert Russell, Akua Asa-Awuku, and Thomas Durbin. “A Complete Assessment of the Emissions Performance of Ethanol Blends and Iso-Butanol Blends from a Fleet of Nine PFI and GDI Vehicles.” SAE International Journal of Fuels and Lubricants 8, no. 2015-01-0957 (2015): 374-395.
  2. Karavalakis, G., Short, D., Chen, V., Espinoza, C., Berte, T., Durbin, T., Asa-Awuku, A., Jung, H. 2014. “Evaluating Particulate Emissions from a Flexible Fuel Vehicle with Direct Injection When Operated on Ethanol and Iso-butanol Blends”,SAE Technical Paper, Accepted 2014 (Online)
  3. Karavalakis, G., Short, D., Vu, D., Villela, M., Russell, R., Jung, H., Asa-Awuku, A., and Durbin, T. “Regulated Emissions, Air Toxics, and Particle Emissions from SI-DI Light-Duty Vehicles Operating on Different Iso-Butanol and Ethanol Blends”, SAE Int. J. Fuels Lubr. 7(1):183-199, 2014, doi:10.4271/2014-01-1451.(Online)
  4. Li, Y., Jian, X., Johnson, K., Durbin, T., Villela, M., Pham, L., Hosseini, E., Short, D., Asa-Awuku, A., Karavalakis, G., Quiros, D., Hu, S., Huai, T., Ayala, A., Jung, H. Determination of Suspended Exhaust PM Mass for Light-Duty Vehicles, SAE Technical Paper 2014-01-1594, 2014, doi:10.4271/2014-01-1594. (Online)
  5. Karavalakis, G., Short, D., Hajabeibi, M., Vu, D., Villela, M., Russell, R., Durbin, T., Asa-Awuku, A. 2013. Criteria Emissions, Particle Number Emissions, Size Distributions, and Black Carbon Measurements from PFI Gasoline Vehicles Fuelled with Different Ethanol and Butanol Blends . SAE, doi:10.4271/2013-01-1147. 10p. Detroit, Michigan. 04/08/2013 (Online)