Cooperative Institute for Research in Environmental Sciences at the University of Colorado Boulder

Paul Ziemann

Research Interests

The primary focus of our group's research is to elucidate mechanisms by which organic compounds emitted from biogenic and anthropogenic sources react in the atmosphere to form products that can create microscopic organic aerosol particles. These reactions occur in the gas- and particle-phases, and the resulting particles affect climate, visibility, and human and environmental health. We conduct experiments under simulated atmospheric conditions and then identify and quantify organic reaction products using a variety of analytical instruments and methods. This information is used to develop chemical mechanisms that can be used to improve air quality and climate models. We also conduct laboratory and field studies aimed at better understanding the chemistry of indoor air.

Current Research

In the past few years our research has primarily focused on determining the products and mechanisms of oxidation reactions conducted in large Teflon environmental chambers where we can simulate the chemistry of the atmosphere. We have employed a variety of mass spectrometry, chromatography, and spectroscopy methods to identify and quantify organic products formed from reactions of the major atmospheric oxidants (OH radicals, O3, and NO3 radicals) with volatile organic compounds commonly emitted from vehicles, consumer products, and vegetation, including wildfires. Information from these studies is being combined with measurements of the rates of chemical reactions and partitioning of acids in phase-separated organic/aqueous systems to better understand the effects of molecular structure on the gas- and particle-phase atmospheric chemistry of organic compounds. We have also continued to apply knowledge gained from this work in collaborative studies conducted with groups at Colorado State University and North Carolina State University to investigate how the chemical and physical properties of organic aerosol particles influence their ability to act as seeds for the formation of clouds, either through absorption of liquid water or by promoting the nucleation of ice crystals. Research conducted with Profs. Jimenez, de Gouw, and Miller on the chemistry of indoor air at the CU-Boulder Art Museum has identified and quantified chemical sources, transformations (including the first observations of autoxidation in indoor air), and deposition processes that lead to the contamination of art objects on display or in storage. Related laboratory experiments have demonstrated that common indoor materials such as painted wallboard and varnished wood can very effectively absorb organic compounds from air, and that alkenes present in human skin oils and commercial products deposited on surfaces play an important role in the removal of ozone in indoor environments. And in a recent study at the Dal Ward Athletic Center we measured organic chemicals evaporated into the air from skin and emitted in the breath of CU-Boulder athletes, and the volatile products of reactions of perspiration and chlorine-containing cleaning products on exercise equipment, in order to evaluate the possible chemical exposures of athletes during training activities. Overall, our work helps to improve current understanding of atmospheric chemistry and aids in the development of air quality models for predicting the fate of organic chemicals outdoors and indoors, their role in particle formation, and the impact of human activities on the environment.  



Organic aerosol particles under scrutiny in Paul Ziemann's laboratory play important roles in urban and regional smog formation processes and can affect human health and visibility as well as global climate. Photo credit: David Oonk/CIRES

Honors and Awards

  • 2018 Outstanding publication Award, Aerosol Science and Technology
  • 2017 Fellow, American Association for Aerosol Research
  • 2001 Kenneth T. Whitby Award, American Association for Aerosol Research

View Publications

  • Price DJ; Day DA; Pagonis D; Stark H; Handschy AV; Algrim LB; Miller SL; de Gouw JA; Ziemann PJ; Jimenez JL. (Aug 2021). Sources of Gas-Phase Species in an Art Museum from Comprehensive Real-Time Measurements. ACS Earth and Space Chemistry. 10.1021/acsearthspacechem.1c00229
  • Bakker-Arkema JG; Ziemann PJ. (Jun 2021). Comprehensive Analysis of Products and the Development of a Quantitative Mechanism for the OH Radical-Initiated Oxidation of 1-Alkenes in the Presence of NOx. The Journal of Physical Chemistry A: Isolated Molecules, Clusters, Radicals, and Ions; Environmental Chemistry, Geochemistry, and Astrochemistry; Theory , 5829-5840. 10.1021/acs.jpca.1c03688
  • Claflin MS; Liu J; Russell LM; Ziemann PJ. (Apr 2021). Comparison of methods of functional group analysis using results from laboratory and field aerosol measurements. Aerosol Science and Technology , 1042-1058. 10.1080/02786826.2021.1918325
  • Bakker-Arkema JG; Ziemann PJ. (Mar 2021). Minimizing Errors in Measured Yields of Particle-Phase Products Formed in Environmental Chamber Reactions: Revisiting the Yields of beta-Hydroxynitrates Formed from 1-Alkene + OH/NOx Reactions. ACS Earth and Space Chemistry , 5(3), 690-702. 10.1021/acsearthspacechem.1c00008
  • Liu X; Day DA; Krechmer JE; Ziemann PJ; Jimenez JL. (Mar 2021). Determining Activity Coefficients of SOA from Isothermal Evaporation in a Laboratory Chamber. Environmental Science and Technology Letters , 8(3), 212-217. 10.1021/acs.estlett.0c00888
  • Claflin MS; Pagonis D; Finewax Z; Handschy A; Day DA; Brown WL; Jayne JT; Worsnop DR; Jimenez JL; Ziemann PJ. (Jan 2021). An in situ gas chromatograph with automatic detector switching between PTR- and EI-TOF-MS: isomer-resolved measurements of indoor air. Atmospheric Measurement Techniques , 14(1), 133-152. 10.5194/amt-14-133-2021
  • Deming BL; Ziemann PJ. (Jan 2021). Measurements of the partitioning of nitric acid and sulfuric acid in aqueous/organic phase-separated systems. , 1(2), 93-103. 10.1039/d0ea00003e
  • Finewax Z; Pagonis D; Claflin MS; Handschy AV; Brown WL; Jenks O; Nault BA; Day DA; Lerner BM; Jimenez JL. (Dec 2020). Quantification and source characterization of volatile organic compounds from exercising and application of chlorine-based cleaning products in a university athletic center. Indoor Air: international journal of indoor air quality and climate. 10.1111/ina.12781
  • Finewax Z; Jimenez JL; Ziemann PJ. (Sep 2020). Development and application of a low-cost vaporizer for rapid, quantitative, in situ addition of organic gases and particles to an environmental chamber. Aerosol Science and Technology , 54(12), 1567-1578. 10.1080/02786826.2020.1808186
  • Algrim LB; Pagonis D; de Gouw JA; Jimenez JL; Ziemann PJ. (Jul 2020). Measurements and modeling of absorptive partitioning of volatile organic compounds to painted surfaces. Indoor Air: international journal of indoor air quality and climate , 30(4), 745-756. 10.1111/ina.12654
  • Algrim LB; Ziemann PJ. (May 2020). Effect of the nitrate group on yields and composition of secondary organic aerosol formed from reactions of alkyl nitrates with OH radicals in the presence of NOx. Aerosol Science and Technology , 54(9), 1070-1082. 10.1080/02786826.2020.1757033
  • Bakker-Arkema JG; Ziemann PJ. (Mar 2020). Measurements of Kinetics and Equilibria for the Condensed Phase Reactions of Hydroperoxides with Carbonyls to Form Peroxyhemiacetals. ACS Earth and Space Chemistry , 4(3), 467-475. 10.1021/acsearthspacechem.0c00008
  • Deming BL; Ziemann PJ. (Mar 2020). Quantification of alkenes on indoor surfaces and implications for chemical sources and sinks. Indoor Air: international journal of indoor air quality and climate , 30(5), 914-924. 10.1111/ina.12662
  • Petters, M; Petters, S; Rothfuss, N; Tandon, A; Kasparoglu, S; Champion, W; Grieshop, A; Ziemann, P; Kreidenweis, S; DeMott, P; Marsh, A; Rovelli, G; Reid, J. (25-Aug 2019). Influences of temperature, humidity, composition, volatility, and time on the amorphous phase transitions of organic aerosols. ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, 258.
  • Pagonis, D; Algrim, LB; Price, DJ; Day, DA; Handschy, AV; Stark, H; Miller, SL; de Gouw, JA; Jimenez, JL; Ziemann, PJ. (SEP 2019). Autoxidation of Limonene Emitted in a University Art Museum. ENVIRONMENTAL SCIENCE & TECHNOLOGY LETTERS, 6(9), 520-524. 10.1021/acs.estlett.9b00425
  • Matsunaga, A; Ziemann, PJ. (12-Sep 2019). Branching Ratios and Rate Constants for Decomposition and Isomerization of beta-Hydroxyalkoxy Radicals Formed from OH Radical-Initiated Reactions of C-6-C-13 2-Methyl-1-Alkenes in the Presence of NOx. JOURNAL OF PHYSICAL CHEMISTRY A, 123(36), 7839-7846. 10.1021/acs.jpca.9b06218
  • Price, DJ; Day, DA; Pagonis, D; Stark, H; Algrim, LB; Handschy, AV; Liu, S; Krechmer, JE; Miller, SL; Hunter, JF; de Gouw, JA; Ziemann, PJ; Jimenez, JL. (19-Nov 2019). Budgets of Organic Carbon Composition and Oxidation in Indoor Air. ENVIRONMENTAL SCIENCE & TECHNOLOGY, 53(22), 13053-13063. 10.1021/acs.est.9b04689
  • Finewax, Z; de Gouw, JA; Ziemann, PJ. (JUL 2019). Products and Secondary Organic Aerosol Yields from the OH and NO3 Radical-Initiated Oxidation of Resorcinol. ACS EARTH AND SPACE CHEMISTRY, 3(7), 1248-1259. 10.1021/acsearthspacechem.9b00112
  • Liu, XX; Day, DA; Krechmer, JE; Brown, W; Peng, Z; Ziemann, PJ; Jimenez, JL. (21-Aug 2019). Direct measurements of semi-volatile organic compound dynamics show near-unity mass accommodation coefficients for diverse aerosols. COMMUNICATIONS CHEMISTRY, 2. 10.1038/s42004-019-0200-x
  • Deming, BL; Pagonis, D; Liu, XX; Day, DA; Talukdar, R; Krechmer, JE; de Gouw, JA; Jimenez, JL; Ziemann, PJ. (28-Jun 2019). Measurements of delays of gas-phase compounds in a wide variety of tubing materials due to gas-wall interactions. ATMOSPHERIC MEASUREMENT TECHNIQUES, 12(6), 3453-3461. 10.5194/amt-12-3453-2019
  • Liu, XX; Deming, B; Pagonis, D; Day, DA; Palm, BB; Talukdar, R; Roberts, JM; Veres, PR; Krechmer, JE; Thornton, JA; de Gouw, JA; Ziemann, PJ; Jimenez, JL. (13-Jun 2019). Effects of gas-wall interactions on measurements of semivolatile compounds and small polar molecules. ATMOSPHERIC MEASUREMENT TECHNIQUES, 12(6), 3137-3149. 10.5194/amt-12-3137-2019
  • Pagonis, D; Price, DJ; Algrim, LB; Day, DA; Handschy, AV; Stark, H; Miller, SL; de Gouw, J; Jimenez, JL; Ziemann, PJ. (7-May 2019). Time-Resolved Measurements of Indoor Chemical Emissions, Deposition, and Reactions in a University Art Museum. ENVIRONMENTAL SCIENCE & TECHNOLOGY, 53(9), 4794-4802. 10.1021/acs.est.9b00276
  • Petters, SS; Kreidenweis, SM; Grieshop, AP; Ziemann, PJ; Petters, MD. (28-Jan 2019). Temperature- and Humidity-Dependent Phase States of Secondary Organic Aerosols. GEOPHYSICAL RESEARCH LETTERS, 46(2), 1005-1013. 10.1029/2018GL080563
  • Algrim, LB; Ziemann, PJ. (MAR 2019). Effect of the Hydroxyl Group on Yields and Composition of Organic Aerosol Formed from OH Radical-Initiated Reactions of Alcohols in the Presence of NOx. ACS EARTH AND SPACE CHEMISTRY, 3(3), 413-423. 10.1021/acsearthspacechem.9b00015
  • Claflin, MS; Ziemann, PJ. (3-Apr 2019). Thermal desorption behavior of hemiacetal, acetal, ether, and ester oligomers. AEROSOL SCIENCE AND TECHNOLOGY, 53(4), 473-484. 10.1080/02786826.2019.1576853
  • Fairey, J; Gorski, C; Higgins, C; Holden, P; Leusch, F; Liu, JY; Remucal, C; Shen, GF; Wong, C; Ziemann, P; Logan, BE. (NOV 2018). Environmental Science & Technology Letters Excellence in Review Awards Presents the 2018. ENVIRONMENTAL SCIENCE & TECHNOLOGY LETTERS, 5(11), 621-621. 10.1021/acs.estlett.8b00532
  • Claflin, MS, JE Krechmer, WW Hu, JL Jimenez and PJ Ziemann. (NOV 2018). Functional Group Composition of Secondary Organic Aerosol Formed from Ozonolysis of alpha-Pinene Under High VOC and Autoxidation Conditions. ACS EARTH AND SPACE CHEMISTRY, 2(11), 1196-1210. 10.1021/acsearthspacechem.8b00117
  • Liu, J, LM Russell, G Ruggeri, S Takahama, MS Claflin, PJ Ziemann, HOT Pye, BN Murphy, L Xu, NL Ng, KA McKinney, SH Budisulistiorini, TH Bertram, A Nenes and JD Surratt. (27-Sep 2018). Regional Similarities and NOx-Related Increases in Biogenic Secondary Organic Aerosol in Summertime Southeastern United States. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 123(18), 10620-10636. 10.1029/2018JD028491
  • Pagonis, D and PJ Ziemann. (2018). Chemistry of hydroperoxycarbonyls in secondary organic aerosol. AEROSOL SCIENCE AND TECHNOLOGY, 52(10), 1178-1193. 10.1080/02786826.2018.1511046
  • Ziemann, P and R Weber. (2018). A Tribute to Peter McMurry. AEROSOL SCIENCE AND TECHNOLOGY, 52(10), 1083-1084. 10.1080/02786826.2018.1524222
  • Claflin, MS and PJ Ziemann. (12-Apr 2018). Identification and Quantitation of Aerosol Products of the Reaction of beta-Pinene with NO3 Radicals and Implications for Gas- and Particle-Phase Reaction Mechanisms. JOURNAL OF PHYSICAL CHEMISTRY A, 122(14), 3640-3652. 10.1021/acs.jpca.8b00692
  • Finewax, Z, JA de Gouw and PJ Ziemann. (20-Feb 2018). Identification and Quantification of 4-Nitrocatechol Formed from OH and NO3 Radical-Initiated Reactions of Catechol in Air in the Presence of NOx: Implications for Secondary Organic Aerosol Formation from Biomass Burning. ENVIRONMENTAL SCIENCE & TECHNOLOGY, 52(4), 1981-1989. 10.1021/acs.est.7b05864
  • Liu, S, SL Thompson, H Stark, PJ Ziemann and JL Jimenez. (16-May 2017). Gas-Phase Carboxylic Acids in a University Classroom: Abundance, Variability, and Sources. ENVIRONMENTAL SCIENCE & TECHNOLOGY, 51(10), 5454-5463. 10.1021/acs.est.7b01358
  • Ranney, AP and PJ Ziemann. (2017). Identification and quantification of oxidized organic aerosol compounds using derivatization, liquid chromatography, and chemical ionization mass spectrometry. AEROSOL SCIENCE AND TECHNOLOGY, 51(3), 342-353. 10.1080/02786826.2016.1271108
  • Burkholder, JB, JPD Abbate, I Barnes, JM Roberts, ML Melamed, M Ammann, AK Bertram, CD Cappa, AG Carlton, LJ Carpenter, JN Crowley, Y Dubowski, C Georges, DE Heard, H Herrmann, FN Keutsch, JH Kroll, VF McNeill, NL Ng, SA Nizkorodov, JJ Orlando, CJ Percival, B Picquet-Varrault, Y Rudich, PW Seakins, JD Surratt, H Tanimoto, JA Thornton, Z Tong, GS Tyndall, A Wahner, CJ Weschler, KR Wilson and PJ Ziemann. (7-Mar 2017). The Essential Role for Laboratory Studies in Atmospheric Chemistry. ENVIRONMENTAL SCIENCE & TECHNOLOGY, 51(5), 2519-2528. 10.1021/acs.est.6b04947
  • Petters, SS, D Pagonis, MS Claflin, EJT Levin, MD Petters, PJ Ziemann and SM Kreidenweis. (13-Jul 2017). Hygroscopicity of Organic Compounds as a Function of Carbon Chain Length and Carboxyl, Hydroperoxy, and Carbonyl Functional Groups. JOURNAL OF PHYSICAL CHEMISTRY A, 121(27), 5164-5174. 10.1021/acs.jpca.7b04114
  • Liu, J, LM Russell, AKY Lee, KA McKinney, JD Surratt and PJ Ziemann. (16-Aug 2017). Observational evidence for pollution-influenced selective uptake contributing to biogenic secondary organic aerosols in the southeastern US. GEOPHYSICAL RESEARCH LETTERS, 44(15), 8056-8064. 10.1002/2017GL074665
  • Krechmer, JE, DA Day, PJ Ziemann and JL Jimenez. (17-Oct 2017). Direct Measurements of Gas/Particle Partitioning and Mass Accommodation Coefficients in Environmental Chambers. ENVIRONMENTAL SCIENCE & TECHNOLOGY, 51(20), 11867-11875. 10.1021/acs.est.7b02144
  • Pagonis, D, JE Krechmer, J de Gouw, JL Jimenez and PJ Ziemann. (4-Dec 2017). Effects of gas-wall partitioning in Teflon tubing and instrumentation on time-resolved measurements of gas-phase organic compounds. ATMOSPHERIC MEASUREMENT TECHNIQUES, 10(12), 4687-4696. 10.5194/amt-10-4687-2017
  • La, YS, M Camredon, PJ Ziemann, R Valorso, A Matsunaga, V Lannuque, J Lee-Taylor, A Hodzic, S Madronich and B Aumont. (2016). Impact of chamber wall loss of gaseous organic compounds on secondary organic aerosol formation: explicit modeling of SOA formation from alkane and alkene oxidation. ATMOSPHERIC CHEMISTRY AND PHYSICS, 16(3), 1417-1431. 10.5194/acp-16-1417-2016
  • Petters, MD, SM Kreidenweis and PJ Ziemann. (2016). Prediction of cloud condensation nuclei activity for organic compounds using functional group contribution methods. GEOSCIENTIFIC MODEL DEVELOPMENT, 9(1), 111-124. 10.5194/gmd-9-111-2016
  • Ranney, AP and PJ Ziemann. (2016). Microscale spectrophotometric methods for quantification of functional groups in oxidized organic aerosol. AEROSOL SCIENCE AND TECHNOLOGY, 50(9), 881-892. 10.1080/02786826.2016.1201197
  • Strollo, CM and PJ Ziemann. (APR 2016). Investigation of the formation of benzoyl peroxide, benzoic anhydride, and other potential aerosol products from gas-phase reactions of benzoylperoxy radicals. ATMOSPHERIC ENVIRONMENT, 130, 202-210. 10.1016/j.atmosenv.2016.01.011
  • Ranney, AP and PJ Ziemann. (28-Apr 2016). Kinetics of Acid-Catalyzed Dehydration of Cyclic Hemiacetals in Organic Aerosol Particles in Equilibrium with Nitric Acid Vapor. JOURNAL OF PHYSICAL CHEMISTRY A, 120(16), 2561-2568. 10.1021/acs.jpca.6b01402
  • Krechmer, JE, D Pagonis, PJ Ziemann and JL Jimenez. (7-Jun 2016). Quantification of Gas-Wall Partitioning in Teflon Environmental Chambers Using Rapid Bursts of Low-Volatility Oxidized Species Generated in Situ. ENVIRONMENTAL SCIENCE & TECHNOLOGY, 50(11), 5757-5765. 10.1021/acs.est.6b00606
  • Algrim, LB and PJ Ziemann. (8-Sep 2016). Effect of the Keto Group on Yields and Composition of Organic Aerosol Formed from OH Radical-Initiated Reactions of Ketones in the Presence of NOx. JOURNAL OF PHYSICAL CHEMISTRY A, 120(35), 6978-6989. 10.1021/acs.jbca.6b0S839
  • Liu, S, R Li, RJ Wild, C Warneke, JA de Gouw, SS Brown, SL Miller, JC Luongo, JL Jimenez and PJ Ziemann. (DEC 2016). Contribution of human-related sources to indoor volatile organic compounds in a university classroom. INDOOR AIR, 26(6), 925-938. 10.1111/ina.12272
  • Ziemann, Paul J. (2015). Atmospheric Chemistry: Nature's plasticized aerosols. Nature Geoscience, 9(1). 10.1038/NGEO2610
  • Bilde, M, K Barsanti, M Booth, CD Cappa, NM Donahue, EU Emanuelsson, G McFiggans, UK Krieger, C Marcolli, D Tropping, P Ziemann, M Barley, S Clegg, B Dennis-Smither, M Hallquist, AM Hallquist, A Khlystov, M Kulmala, D Mogensen, CJ Percival, F Pope, JP Reid, MAVR da Silva, T Rosenoern, K Salo, VP Soonsin, T Yli-Juuti, NL Prisle, J Pagels, J Rarey, AA Zardini and I Riipinen. (27-May 2015). Saturation Vapor Pressures and Transition Enthalpies of Low-Volatility Organic Molecules of Atmospheric Relevance: From Dicarboxylic Acids to Complex Mixtures. CHEMICAL REVIEWS, 115(10), 4115-4156. 10.1021/cr5005502
  • Yeh, GK and PJ Ziemann. (2-Sep 2015). Gas-Wall Partitioning of Oxygenated Organic Compounds: Measurements, Structure-Activity Relationships, and Correlation with Gas Chromatographic Retention Factor. AEROSOL SCIENCE AND TECHNOLOGY, 49(9), 726-737. 10.1080/02786826.2015.1068427
  • Waxman, EM, J Elm, T Kurten, KV Mikkelsen, PJ Ziemann and R Vokamer. (6-Oct 2015). Glyoxal and Methylglyoxal Setschenow Salting Constants in Sulfate, Nitrate, and Chloride Solutions: Measurements and Gibbs Energies. ENVIRONMENTAL SCIENCE & TECHNOLOGY, 49(19), 11500-11508. 10.1021/acs.est.5b02782
  • Yeh, GK, MS Claflin and PJ Ziemann. (29-Oct 2015). Products and Mechanism of the Reaction of 1-Pentadecene with NO3 Radicals and the Effect of a -ONO2 Group on Alkoxy Radical Decomposition. JOURNAL OF PHYSICAL CHEMISTRY A, 119(43), 10684-10696. 10.1021/acs.jpca.5b07468
  • Yee, LD, JS Craven, CL Loza, KA Schilling, NL Ng, MR Canagaratna, PJ Ziemann, RC Flagan and JH Seinfeld. (2013). Effect of chemical structure on secondary organic aerosol formation from C-12 alkanes. ATMOSPHERIC CHEMISTRY AND PHYSICS, 13(21), 11121-11140. 10.5194/acp-13-11121-2013
  • Aimanant, S and PJ Ziemann. (1-Jun 2013). Development of Spectrophotometric Methods for the Analysis of Functional Groups in Oxidized Organic Aerosol. AEROSOL SCIENCE AND TECHNOLOGY, 47(6), 581-591. 10.1080/02786826.2013.773579
  • Shiraiwa, M, LD Yee, KA Schilling, CL Loza, JS Craven, A Zuend, PJ Ziemann and JH Seinfeld. (16-Jul 2013). Size distribution dynamics reveal particle-phase chemistry in organic aerosol formation. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 110(29), 11746-11750. 10.1073/pnas.1307501110
  • Aimanant, S and PJ Ziemann. (1-Sep 2013). Chemical Mechanisms of Aging of Aerosol Formed from the Reaction of n-Pentadecane with OH Radicals in the Presence of NOx. AEROSOL SCIENCE AND TECHNOLOGY, 47(9), 979-990. 10.1080/02786826.2013.804621
  • Strollo, CM and PJ Ziemann. (OCT 2013). Products and mechanism of secondary organic aerosol formation from the reaction of 3-methylfuran with OH radicals in the presence of NOx. ATMOSPHERIC ENVIRONMENT, 77, 534-543. 10.1016/j.atmosenv.2013.05.033
  • Ziemann, PJ and R Atkinson. (2012). Kinetics, products, and mechanisms of secondary organic aerosol formation. CHEMICAL SOCIETY REVIEWS, 41(19), 6582-6605. 10.1039/c2cs35122f
  • Craven, JS, LD Yee, NL Ng, MR Canagaratna, CL Loza, KA Schilling, RLN Yatavelli, JA Thornton, PJ Ziemann, RC Flagan and JH Seinfeld. (2012). Analysis of secondary organic aerosol formation and aging using positive matrix factorization of high-resolution aerosol mass spectra: application to the dodecane low-NOx system. ATMOSPHERIC CHEMISTRY AND PHYSICS, 12(24), 11795-11817. 10.5194/acp-12-11795-2012
  • Suda, SR, MD Petters, A Matsunaga, RC Sullivan, PJ Ziemann and SM Kreidenweis. (22-Feb 2012). Hygroscopicity frequency distributions of secondary organic aerosols. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 117. 10.1029/2011JD016823
  • Yee, LD, JS Craven, CL Loza, KA Schilling, NL Ng, MR Canagaratna, PJ Ziemann, RC Flagan and JH Seinfeld. (21-Jun 2012). Secondary Organic Aerosol Formation from Low-NOx Photooxidation of Dodecane: Evolution of Multigeneration Gas-Phase Chemistry and Aerosol Composition. JOURNAL OF PHYSICAL CHEMISTRY A, 116(24), 6211-6230. 10.1021/jp211531h
  • Ziemann, PJ. (2011). Effects of molecular structure on the chemistry of aerosol formation from the OH-radical-initiated oxidation of alkanes and alkenes. INTERNATIONAL REVIEWS IN PHYSICAL CHEMISTRY, 30(2), 161-195. 10.1080/0144235X.2010.550728
  • Docherty, KS, AC Aiken, JA Huffman, IM Ulbrich, PF DeCarlo, D Sueper, DR Worsnop, DC Snyder, RE Peltier, RJ Weber, BD Grover, DJ Eatough, BJ Williams, AH Goldstein, PJ Ziemann and JL Jimenez. (2011). The 2005 Study of Organic Aerosols at Riverside (SOAR-1): instrumental intercomparisons and fine particle composition. ATMOSPHERIC CHEMISTRY AND PHYSICS, 11(23), 12387-12420. 10.5194/acp-11-12387-2011
  • Russell, LM, R Bahadur and PJ Ziemann. (1-Mar 2011). Identifying organic aerosol sources by comparing functional group composition in chamber and atmospheric particles. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 108(9), 3516-3521. 10.1073/pnas.1006461108
  • Day, DA, S Liu, LM Russell and PJ Ziemann. (MAY 2010). Organonitrate group concentrations in submicron particles with high nitrate and organic fractions in coastal southern California. ATMOSPHERIC ENVIRONMENT, 44(16), 1970-1979. 10.1016/j.atmosenv.2010.02.045
  • Matsunaga, A and PJ Ziemann. (2010). Gas-Wall Partitioning of Organic Compounds in a Teflon Film Chamber and Potential Effects on Reaction Product and Aerosol Yield Measurements. AEROSOL SCIENCE AND TECHNOLOGY, 44(10), 881-892. 10.1080/02786826.2010.501044
  • Farmer, DK, A Matsunaga, KS Docherty, JD Surratt, JH Seinfeld, PJ Ziemann and JL Jimenez. (13-Apr 2010). Response of an aerosol mass spectrometer to organonitrates and organosulfates and implications for atmospheric chemistry. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 107(15), 6670-6675. 10.1073/pnas.0912340107
  • Matsunaga, A and PJ Ziemann. (13-Apr 2010). Yields of beta-hydroxynitrates, dihydroxynitrates, and trihydroxynitrates formed from OH radical-initiated reactions of 2-methyl-1-alkenes. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 107(15), 6664-6669. 10.1073/pnas.0910585107
  • Vicars, WC, JO Sickman and PJ Ziemann. (AUG 2010). Atmospheric phosphorus deposition at a montane site: Size distribution, effects of wildfire, and ecological implications. ATMOSPHERIC ENVIRONMENT, 44(24), 2813-2821. 10.1016/j.atmosenv.2010.04.055
  • Lim, YB and PJ Ziemann. (2009). Kinetics of the heterogeneous conversion of 1,4-hydroxycarbonyls to cyclic hemiacetals and dihydrofurans on organic aerosol particles. PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 11(36), 8029-8039. 10.1039/b904333k
  • Huffman, JA, KS Docherty, AC Aiken, MJ Cubison, IM Ulbrich, PF DeCarlo, D Sueper, JT Jayne, DR Worsnop, PJ Ziemann and JL Jimenez. (2009). Chemically-resolved aerosol volatility measurements from two megacity field studies. ATMOSPHERIC CHEMISTRY AND PHYSICS, 9(18), 7161-7182. 10.5194/acp-9-7161-2009
  • Dzepina, K, RM Volkamer, S Madronich, P Tulet, IM Ulbrich, Q Zhang, CD Cappa, PJ Ziemann and JL Jimenez. (2009). Evaluation of recently-proposed secondary organic aerosol models for a case study in Mexico City. ATMOSPHERIC CHEMISTRY AND PHYSICS, 9(15), 5681-5709. 10.5194/acp-9-5681-2009
  • Volkamer, R, PJ Ziemann and MJ Molina. (2009). Secondary Organic Aerosol Formation from Acetylene (C2H2): seed effect on SOA yields due to organic photochemistry in the aerosol aqueous phase. ATMOSPHERIC CHEMISTRY AND PHYSICS, 9(6), 1907-1928. 10.5194/acp-9-1907-2009
  • Lim, YB and PJ Ziemann. (2009). Chemistry of Secondary Organic Aerosol Formation from OH Radical-Initiated Reactions of Linear, Branched, and Cyclic Alkanes in the Presence of NOx. AEROSOL SCIENCE AND TECHNOLOGY, 43(6), 604-619. 10.1080/02786820902802567
  • Matsunaga, A and PJ Ziemann. (22-Jan 2009). Yields of beta-Hydroxynitrates and Dihydroxynitrates in Aerosol Formed from OH Radical-Initiated Reactions of Linear Alkenes in the Presence of NOx. JOURNAL OF PHYSICAL CHEMISTRY A, 113(3), 599-606. 10.1021/jp807764d
  • Matsunaga, A, KS Docherty, YB Lim and PJ Ziemann. (FEB 2009). Composition and yields of secondary organic aerosol formed from OH radical-initiated reactions of linear alkenes in the presence of NOx: Modeling and measurements. ATMOSPHERIC ENVIRONMENT, 43(6), 1349-1357. 10.1016/j.atmosenv.2008.12.004
  • Prenni, AJ, MD Petters, A Faulhaber, CM Carrico, PJ Ziemann, SM Kreidenweis and PJ DeMott. (26-Mar 2009). Heterogeneous ice nucleation measurements of secondary organic aerosol generated from ozonolysis of alkenes. GEOPHYSICAL RESEARCH LETTERS, 36. 10.1029/2008GL036957
  • Lim, YB and PJ Ziemann. (1-Apr 2009). Effects of Molecular Structure on Aerosol Yields from OH Radical-Initiated Reactions of Linear, Branched, and Cyclic Alkanes in the Presence of NOx. ENVIRONMENTAL SCIENCE & TECHNOLOGY, 43(7), 2328-2334. 10.1021/es803389s
  • Huffman, JA, KS Docherty, C Mohr, MJ Cubison, IM Ulbrich, PJ Ziemann, TB Onasch and JL Jimenez. (15-Jul 2009). Chemically-Resolved Volatility Measurements of Organic Aerosol from Different Sources. ENVIRONMENTAL SCIENCE & TECHNOLOGY, 43(14), 5351-5357. 10.1021/es803539d
  • Petters, MD, SM Kreidenweis, AJ Prenni, RC Sullivan, CM Carrico, KA Koehler and PJ Ziemann. (17-Nov 2009). Role of molecular size in cloud droplet activation. GEOPHYSICAL RESEARCH LETTERS, 36. 10.1029/2009GL040131
  • Huffman, JA, PJ Ziemann, JT Jayne, DR Worsnop and JL Jimenez. (2008). Development and characterization of a fast-stepping/scanning thermodenuder for chemically-resolved aerosol volatility measurements. AEROSOL SCIENCE AND TECHNOLOGY, 42(5), 395-407. 10.1080/02786820802104981
  • Aiken, AC, PF Decarlo, JH Kroll, DR Worsnop, JA Huffman, KS Docherty, IM Ulbrich, C Mohr, JR Kimmel, D Sueper, Y Sun, Q Zhang, A Trimborn, M Northway, PJ Ziemann, MR Canagaratna, TB Onasch, MR Alfarra, ASH Prevot, J Dommen, J Duplissy, A Metzger, U Baltensperger and JL Jimenez. (15-Jun 2008). O/C and OM/OC ratios of primary, secondary, and ambient organic aerosols with high-resolution time-of-flight aerosol mass spectrometry. ENVIRONMENTAL SCIENCE & TECHNOLOGY, 42(12), 4478-4485. 10.1021/es703009q
  • Jordan, CE, PJ Ziemann, RJ Griffin, YB Lim, R Atkinson and J Arey. (NOV 2008). Modeling SOA formation from OH reactions with C-8-C-17 n-alkanes. ATMOSPHERIC ENVIRONMENT, 42(34), 8015-8026. 10.1016/j.atmosenv.2008.06.017
  • Dick, WD, PJ Ziemann and PH McMurry. (MAY 2007). Multiangle light-scattering measurements of refractive index of submicron atmospheric particles. AEROSOL SCIENCE AND TECHNOLOGY, 41(5), 549-569. 10.1080/02786820701272012
  • Prenni, AJ, MD Petters, SM Kreidenweis, PJ DeMott and PJ Ziemann. (26-May 2007). Cloud droplet activation of secondary organic aerosol. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 112(D10). 10.1029/2006JD007963
  • Docherty, KS and PJ Ziemann. (16-Mar 2006). Reaction of oleic acid particles with NO3 radicals: Products, mechanism, and implications for radical-initiated organic aerosol oxidation. JOURNAL OF PHYSICAL CHEMISTRY A, 110(10), 3567-3577. 10.1021/jp0582383
  • Petters, MD, AJ Prenni, SM Kreidenweis, PJ DeMott, A Matsunaga, YB Lim and PJ Ziemann. (19-Dec 2006). Chemical aging and the hydrophobic-to-hydrophilic conversion of carbonaceous aerosol. GEOPHYSICAL RESEARCH LETTERS, 33(24). 10.1029/2006GL027249
  • Docherty, KS, W Wu, YB Lim and PJ Ziemann. (1-Jun 2005). Contributions of organic peroxides to secondary aerosol formed from reactions of monoterpenes with O-3. ENVIRONMENTAL SCIENCE & TECHNOLOGY, 39(11), 4049-4059. 10.1021/es050228s
  • Chattopadhyay, S and PJ Ziemann. (NOV 2005). Vapor pressures of substituted and unsubstituted monocarboxylic and dicarboxylic acids measured using an improved thermal desorption particle beam mass spectrometry method. AEROSOL SCIENCE AND TECHNOLOGY, 39(11), 1085-1100. 10.1080/02786820500421547
  • Lim, YB and PJ Ziemann. (1-Dec 2005). Products and mechanism of secondary organic aerosol formation from reactions of n-alkanes with OH radicals in the presence of NOx. ENVIRONMENTAL SCIENCE & TECHNOLOGY, 39(23), 9229-9236. 10.1021/es051447g
  • Ziemann, PJ. (2005). Aerosol products, mechanisms, and kinetics of heterogeneous reactions of ozone with oleic acid in pure and mixed particles. FARADAY DISCUSSIONS, 130, 469-490. 10.1039/b417502f
  • Gong, HM, A Matsunaga and PJ Ziemann. (19-May 2005). Products and mechanism of secondary organic aerosol formation from reactions of linear alkenes with NO3 radicals. JOURNAL OF PHYSICAL CHEMISTRY A, 109(19), 4312-4324. 10.1021/jo0580241
  • Docherty, KS, K Kumboonlert, IJ Lee and PJ Ziemann. (12-Mar 2004). Gas chromatography of trimethylsilyl derivatives of alpha-methoxyalkyl hydroperoxides formed in alkene-O-3 reactions. JOURNAL OF CHROMATOGRAPHY A, 1029(2-Jan), 205-215. 10.1016/j.chroma.2003.12.014
  • Pui, DYH, RC Flagan, SL Kaufman, AD Maynard, JF de la Mora, SV Hering, JL Jimenez, KA Prather, AS Wexler and PJ Ziemann. (JUN 2004). Experimental methods and instrumentation. JOURNAL OF NANOPARTICLE RESEARCH, 6(3-Feb), 314-315.
  • Sakurai, H, HJ Tobias, K Park, D Zarling, KS Docherty, DB Kittelson, PH McMurry and PJ Ziemann. (MAR 2003). On-line measurements of diesel nanoparticle composition and volatility. ATMOSPHERIC ENVIRONMENT, 37(10-Sep), 1199-1210. 10.1016/S1352-2310(02)01017-8
  • Ziemann, PJ. (27-Mar 2003). Formation of alkoxyhydroperoxy aldehydes and cyclic peroxyhemiacetals from reactions of cyclic alkenes with O-3 in the presence of alcohols. JOURNAL OF PHYSICAL CHEMISTRY A, 107(12), 2048-2060. 10.1021/jp022114y
  • Docherty, KS and PJ Ziemann. (NOV 2003). Effects of stabilized Criegee intermediate and OH radical scavengers on aerosol formation from reactions of beta-pinene with O-3. AEROSOL SCIENCE AND TECHNOLOGY, 37(11), 877-891. 10.1080/02786820390228364
  • Sakurai, H, K Park, PH McMurry, DD Zarling, DB Kittelson and PJ Ziemann. (15-Dec 2003). Size-dependent mixing characteristics of volatile and nonvolatile components in diesel exhaust aerosols. ENVIRONMENTAL SCIENCE & TECHNOLOGY, 37(24), 5487-5495. 10.1021/es034362t
  • Ziemann, PJ. (2-May 2002). Evidence for low-volatility diacyl peroxides as a nucleating agent and major component of aerosol formed from reactions of O-3 with cyclohexene and homologous compounds. JOURNAL OF PHYSICAL CHEMISTRY A, 106(17), 4390-4402. 10.1021/jp012925m
  • Tobias, HJ, DE Beving, PJ Ziemann, H Sakurai, M Zuk, PH McMurry, D Zarling, R Waytulonis and DB Kittelson. (1-Jun 2001). Chemical analysis of diesel engine nanoparticles using a nano-DMA/thermal desorption particle beam mass spectrometer. ENVIRONMENTAL SCIENCE & TECHNOLOGY, 35(11), 2233-2243. 10.1021/es0016654
  • Tobias, HJ and PJ Ziemann. (28-Jun 2001). Kinetics of the gas-phase reactions of alcohols, aldehydes, carboxylic acids, and water with the C13 stabilized Criegee intermediate formed from ozonolysis of 1-tetradecene. JOURNAL OF PHYSICAL CHEMISTRY A, 105(25), 6129-6135. 10.1021/jp004631r
  • Docherty, KS and PJ Ziemann. (6-Jul 2001). On-line, inlet-based trimethylsilyl derivatization for gas chromatography of mono- and dicarboxylic acids. JOURNAL OF CHROMATOGRAPHY A, 921(2), 265-275. 10.1016/S0021-9673(01)00864-0
  • Chattopadhyay, S, HJ Tobias and PJ Ziemann. (15-Aug 2001). A method for measuring vapor pressures of low-volatility organic aerosol compounds using a thermal desorption particle beam mass spectrometer. ANALYTICAL CHEMISTRY, 73(16), 3797-3803. 10.1021/ac010304j
  • Tobias, HJ, KS Docherty, DE Beving and PJ Ziemann. (1-Jun 2000). Effect of relative humidity on the chemical composition of secondary organic aerosol formed from reactions of 1-tetradecene and O-3. ENVIRONMENTAL SCIENCE & TECHNOLOGY, 34(11), 2116-2125. 10.1021/es991057s
  • Tobias, HJ and PJ Ziemann. (1-Jun 2000). Thermal desorption mass spectrometric analysis of organic aerosol formed from reactions of 1-tetradecene and O-3 in the presence of alcohols and carboxylic acids. ENVIRONMENTAL SCIENCE & TECHNOLOGY, 34(11), 2105-2115. 10.1021/es9907156
  • Tobias, HJ, PM Kooiman, KS Docherty and PJ Ziemann. (JUL-AUG 2000). Real-time chemical analysis of organic aerosols using a thermal desorption particle beam mass spectrometer. AEROSOL SCIENCE AND TECHNOLOGY, 33(2-Jan), 170-190. 10.1080/027868200410912
  • Tobias, HJ and PJ Ziemann. (15-Aug 1999). Compound identification in organic aerosols using temperature-programmed thermal desorption particle beam mass spectrometry. ANALYTICAL CHEMISTRY, 71(16), 3428-3435. 10.1021/ac990056f
  • Ziemann, PJ and PH McMurry. (JAN 1998). Secondary electron yield measurements as a means for probing organic films on aerosol particles. AEROSOL SCIENCE AND TECHNOLOGY, 28(1), 77-90. 10.1080/02786829808965513
  • Dick, WD, PJ Ziemann, PF Huang and PH McMurry. (FEB 1998). Optical shape fraction measurements of submicrometre laboratory and atmospheric aerosols. MEASUREMENT SCIENCE AND TECHNOLOGY, 9(2), 183-196. 10.1088/0957-0233/9/2/006
  • Ziemann, PJ. (JUN-JUL 1998). Particle mass and size measurement using mass spectrometry. TRAC-TRENDS IN ANALYTICAL CHEMISTRY, 17(6), 322-328. 10.1016/S0165-9936(98)00036-3
  • Jefferson, A, FL Eisele, PJ Ziemann, RJ Weber, JJ Marti and PH McMurry. (20-Aug 1997). Measurements of the H2SO4 mass accommodation coefficient onto polydisperse aerosol. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 102(D15), 19021-19028. 10.1029/97JD01152
  • Ziemann, PJ and PH McMurry. (15-Sep 1997). Spatial distribution of chemical components in aerosol particles as determined from secondary electron yield measurements: Implications for mechanisms of multicomponent aerosol crystallization. JOURNAL OF COLLOID AND INTERFACE SCIENCE, 193(2), 250-258. 10.1006/jcis.1997.5075
  • Ziemann, PJ, DB Kittelson and PH McMurry. (JUN 1996). Effects of particle shape and chemical composition on the electron impact charging properties of submicron inorganic particles. JOURNAL OF AEROSOL SCIENCE, 27(4), 587-&. 10.1016/0021-8502(96)00010-9
  • LIU, P, PJ ZIEMANN, DB KITTELSON and PH MCMURRY. (APR 1995). GENERATING PARTICLE BEAMS OF CONTROLLED DIMENSIONS AND DIVERGENCE .2. EXPERIMENTAL EVALUATION OF PARTICLE MOTION IN AERODYNAMIC LENSES AND NOZZLE EXPANSIONS. AEROSOL SCIENCE AND TECHNOLOGY, 22(3), 314-324. 10.1080/02786829408959749
  • LIU, P, PJ ZIEMANN, DB KITTELSON and PH MCMURRY. (APR 1995). GENERATING PARTICLE BEAMS OF CONTROLLED DIMENSIONS AND DIVERGENCE .1. THEORY OF PARTICLE MOTION IN AERODYNAMIC LENSES AND NOZZLE EXPANSIONS. AEROSOL SCIENCE AND TECHNOLOGY, 22(3), 293-313. 10.1080/02786829408959748
  • ZIEMANN, PJ, P LIU, DB KITTELSON and PH MCMURRY. (6-Apr 1995). ELECTRON-IMPACT CHARGING PROPERTIES OF SIZE-SELECTED, SUBMICROMETER ORGANIC PARTICLES. JOURNAL OF PHYSICAL CHEMISTRY, 99(14), 5126-5138. 10.1021/j100014a037
  • ZIEMANN, PJ, P LIU, NP RAO, DB KITTELSON and PH MCMURRY. (JUL 1995). PARTICLE-BEAM MASS-SPECTROMETRY OF SUBMICRON PARTICLES CHARGED TO SATURATION IN AN ELECTRON-BEAM. JOURNAL OF AEROSOL SCIENCE, 26(5), 745-756. 10.1016/0021-8502(95)00009-2
  • FARLEY, RW, PJ ZIEMANN, RG KEESEE and AW CASTLEMAN. (FEB 1993). KINETIC-STUDY OF NEUTRAL LEAD CLUSTER REACTIONS. ZEITSCHRIFT FUR PHYSIK D-ATOMS MOLECULES AND CLUSTERS, 25(3), 267-273. 10.1007/BF01426890
  • ZIEMANN, PJ and AW CASTLEMAN. (28-May 1992). STRUCTURES AND BONDING PROPERTIES OF CA-O CLUSTERS INFERRED FROM MASS-SPECTRAL ABUNDANCE PATTERNS. JOURNAL OF PHYSICAL CHEMISTRY, 96(11), 4271-4276. 10.1021/j100190a031
  • ZIEMANN, PJ and AW CASTLEMAN. (15-Nov 1992). MASS-SPECTROMETRIC INVESTIGATION OF THE STABILITIES AND STRUCTURES OF MN-O AND MN-MG-O CLUSTERS. PHYSICAL REVIEW B, 46(20), 13480-13486. 10.1103/PhysRevB.46.13480
  • ZIEMANN, PJ and AW CASTLEMAN. (1991). MASS-SPECTROMETRIC STUDY OF MGO CLUSTERS PRODUCED BY THE GAS AGGREGATION TECHNIQUE. ZEITSCHRIFT FUR PHYSIK D-ATOMS MOLECULES AND CLUSTERS, 20(4-Jan), 97-99. 10.1007/BF01543947
  • ZIEMANN, PJ and AW CASTLEMAN. (1-Jan 1991). STABILITIES AND STRUCTURES OF GAS-PHASE MGO CLUSTERS. JOURNAL OF CHEMICAL PHYSICS, 94(1), 718-728. 10.1063/1.460340
  • ZIEMANN, PJ and AW CASTLEMAN. (15-Sep 1991). MASS-SPECTROMETRIC STUDY OF THE FORMATION, EVAPORATION, AND STRUCTURAL-PROPERTIES OF DOUBLY CHARGED MGO CLUSTERS. PHYSICAL REVIEW B, 44(12), 6488-6499. 10.1103/PhysRevB.44.6488