Publications

2010
M. Pikridas, a. Bougiatioti,, Hildebrandt, L., Engelhart, G. J., Kostenidou, E., Mohr, C., a. Prévôt, S. H., Kouvarakis, G., Zarmpas, P., Burkhart, J. F., Lee, B. - H., Psichoudaki, M., Mihalopoulos, N., Pilinis, C., a. Stohl,, Baltensperger, U., Kulmala, M., and Pandis, S. N., “The Finokalia Aerosol Measurement Experiment – 2008 (FAME-08): an overview,” Atmospheric Chemistry and Physics, vol. 10, pp. 6793–6806, 2010. Publisher's Version
N. L. Ng, Canagaratna, M. R., Zhang, Q., Jimenez, J. L., Tian, J., Ulbrich, I. M., Kroll, J. H., Docherty, K. S., Chhabra, P. S., Bahreini, R., Murphy, S. M., Seinfeld, J. H., Hildebrandt, L., Donahue, N. M., DeCarlo, P. F., Lanz, V. A., Prevot, A. S. H., Dinar, E., Rudich, Y., and Worsnop, D. R., “Organic aerosol components observed in northern hemispheric datasets from aerosol mass spectrometry,” Atmospheric Chemistry And Physics, vol. 10, pp. 4625–4641, 2010.
L. Hildebrandt, Engelhart, G. J., Mohr, C., Kostenidou, E., Lanz, V. A., Bougiatioti, A., DeCarlo, P. F., Prevot, A. S. H., Baltensperger, U., Mihalopoulos, N., Donahue, N. M., and Pandis, S. N., “Aged organic aerosol in the Eastern Mediterranean: The Finokalia Aerosol Measurement Experiment – 2008,” Atmospheric Chemistry And Physics, vol. 10, pp. 4167–4186, 2010.
L. Hildebrandt, Kostenidou, E., Mihalopoulos, N., Worsnop, D. R., Donahue, N. M., and Pandis, S. N., “Formation of highly oxygenated organic aerosol in the atmosphere: Insights from the Finokalia Aerosol Measurement Experiments,” Geophysical Research Letters, vol. 37, 2010.
B. H. Lee, Kostenidou, E., Hildebrandt, L., Riipinen, I., Engelhart, G. J., Mohr, C., DeCarlo, P. F., Mihalopoulos, N., a. Prevot, S. H., Baltensperger, U., and Pandis, S. N., “Measurement of the ambient organic aerosol volatility distribution: application during the Finokalia Aerosol Measurement Experiment (FAME-2008),” Atmospheric Chemistry and Physics, vol. 10, pp. 12149–12160, 2010. Publisher's Version
2009
L. Hildebrandt, Donahue, N. M., and Pandis, S. N., “High formation of secondary organic aerosol from the photo-oxidation of toluene,” Atmospheric Chemistry And Physics, pp. 2973–2986, 2009.
2008
J. R. Pierce, Engelhart, G. J., Hildebrandt, L., a. Weitkamp, E., Pathak, R. K., Donahue, N. M., a. Robinson, L., Adams, P. J., and Pandis, S. N., “Constraining Particle Evolution from Wall Losses, Coagulation, and Condensation-Evaporation in Smog-Chamber Experiments: Optimal Estimation Based on Size Distribution Measurements,” Aerosol Science and Technology, vol. 42, pp. 1001–1015, 2008. Publisher's Version
2006
U. Dusek, Frank, G. P., Hildebrandt, L., Curtius, J., Schneider, J., Walter, S., Chand, D., Drewnick, F., Hings, S., Jung, D., Borrmann, S., and Andreae, M. O., “Size matters more than chemistry for cloud-nucleating ability of aerosol particles.,” Science (New York, N.Y.), vol. 312, pp. 1375–8, 2006. Publisher's VersionAbstract
Size-resolved cloud condensation nuclei (CCN) spectra measured for various aerosol types at a non-urban site in Germany showed that CCN concentrations are mainly determined by the aerosol number size distribution. Distinct variations of CCN activation with particle chemical composition were observed but played a secondary role. When the temporal variation of chemical effects on CCN activation is neglected, variation in the size distribution alone explains 84 to 96% of the variation in CCN concentrations. Understanding that particles' ability to act as CCN is largely controlled by aerosol size rather than composition greatly facilitates the treatment of aerosol effects on cloud physics in regional and global models.
J. D. Surratt, Murphy, S. M., Kroll, J. H., Ng, N. L., Hildebrandt, L., Sorooshian, A., Szmigielski, R., Vermeylen, R., Maenhaut, W., Claeys, M., Flagan, R. C., and Seinfeld, J. H., “Chemical Composition of Secondary Organic Aerosol Formed from the Photooxidation of Isoprene,” J. Phys. Chem. A, vol. 110, pp. 9665–9690, 2006.
M. I. Guzmán, Hildebrandt, L., Colussi, A. \'ınJ., and Hoffmann, M. R., “Cooperative hydration of pyruvic acid in ice.,” Journal of the American Chemical Society, vol. 128, pp. 10621–4, 2006. Publisher's VersionAbstract
About 3.5 +/- 0.3 water molecules are still involved in the exothermic hydration of 2-oxopropanoic acid (PA) into its monohydrate (2,2-dihydroxypropanoic acid, PAH) in ice at 230 K. This is borne out by thermodynamic analysis of the fact that QH(T) = [PAH]/[PA] becomes temperature independent below approximately 250 K (in chemically and thermally equilibrated frozen 0.1 < or = [PA]/M < or = 4.6 solutions in D2O), which requires that the enthalpy of PA hydration (DeltaHH approximately -22 kJ mol(-1)) be balanced by a multiple of the enthalpy of ice melting (DeltaHM = 6.3 kJ mol(-1)). Considering that: (1) thermograms of frozen PA solutions display a single endotherm, at the onset of ice melting, (2) the sum of the integral intensities of the 1deltaPAH and 1deltaPA methyl proton NMR resonances is nearly constant while, (3) line widths increase exponentially with decreasing temperature before diverging below approximately 230 K, we infer that PA in ice remains cooperatively hydrated within interstitial microfluids until they vitrify.

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