@article{cornwell_sultana_petters_al-mashat_rothfuss_mohler_demott_martin_prather_2022, title={Discrimination between individual dust and bioparticles using aerosol time-of-flight mass spectrometry}, ISSN={["1521-7388"]}, DOI={10.1080/02786826.2022.2055994}, journal={AEROSOL SCIENCE AND TECHNOLOGY}, author={Cornwell, G. C. and Sultana, C. M. and Petters, M. D. and Al-Mashat, H. and Rothfuss, N. E. and Mohler, O. and DeMott, P. J. and Martin, A. C. and Prather, K. A.}, year={2022}, month={Mar} }
 @article{rothfuss_petters_champion_grieshop_petters_2019, title={Characterization of a dimer preparation method for nanoscale organic aerosol}, volume={53}, ISSN={["1521-7388"]}, url={https://doi.org/10.1080/02786826.2019.1623379}, DOI={10.1080/02786826.2019.1623379}, abstractNote={AbstractNanoscale dimers have application in studies of aerosol physicochemical properties such as aerosol viscosity. These particle dimers can be synthesized using the dual tandem differential mob...}, number={9}, journal={AEROSOL SCIENCE AND TECHNOLOGY}, publisher={Informa UK Limited}, author={Rothfuss, Nicholas E. and Petters, Sarah S. and Champion, Wyatt M. and Grieshop, Andrew P. and Petters, Markus D.}, year={2019}, month={Sep}, pages={998–1011} }
 @article{tandon_rothfuss_petters_2019, title={The effect of hydrophobic glassy organic material on the cloud condensation nuclei activity of particles with different morphologies}, volume={19}, ISSN={["1680-7324"]}, DOI={10.5194/acp-19-3325-2019}, abstractNote={Abstract. Particles composed of organic and inorganic components can assume core-shell morphologies. The kinetic limitation of water uptake due to the presence of a hydrophobic viscous outer shell may increase the critical supersaturation required to activate such particles into cloud droplets. Here we test this hypothesis through laboratory experiments. Results show that the viscosity of polyethylene particles is 5×106 Pa s at 60 ∘C. Extrapolation of temperature dependent viscosity measurements suggests that the particles are glassy at room temperature. Cloud condensation nuclei (CCN) activity measurements demonstrate that pure polyethylene particles are CCN inactive at diameters less than 741 nm and 2.5 % water supersaturation. Thus, polyethylene is used as proxy for hydrophobic glassy organic material. Ammonium sulfate is used as proxy for hygroscopic CCN active inorganic material. Mixed particles were generated using coagulation of oppositely charged particles; charge-neutral polyethylene–ammonium sulfate dimer particles were then isolated for online observation. Morphology of these dimer particles was varied by heating, such that liquefied polyethylene partially or completely engulfed the ammonium sulfate. Critical supersaturation was measured as a function of dry particle volume, particle morphology, and organic volume fraction. The data show that kinetic limitations do not change the critical supersaturation of 50 nm ammonium sulfate cores coated with polyethylene and polyethylene volume fractions up to 97 %. Based on these results, and a synthesis of literature data, it is suggested that mass transfer limitations by glassy organic shells are unlikely to affect cloud droplet activation near laboratory temperatures.}, number={5}, journal={ATMOSPHERIC CHEMISTRY AND PHYSICS}, author={Tandon, Ankit and Rothfuss, Nicholas E. and Petters, Markus D.}, year={2019}, month={Mar}, pages={3325–3339} }
 @article{champion_rothfuss_petters_grieshop_2019, title={Volatility and Viscosity Are Correlated in Terpene Secondary Organic Aerosol Formed in a Flow Reactor}, volume={6}, ISSN={["2328-8930"]}, url={https://doi.org/10.1021/acs.estlett.9b00412}, DOI={10.1021/acs.estlett.9b00412}, abstractNote={Secondary organic aerosol (SOA) is a complex mixture of largely unspeciated compounds. The volatility and viscosity of the bulk organic aerosol influence new particle formation, processing, and lif...}, number={9}, journal={ENVIRONMENTAL SCIENCE & TECHNOLOGY LETTERS}, publisher={American Chemical Society (ACS)}, author={Champion, Wyatt M. and Rothfuss, Nicholas E. and Petters, Markus D. and Grieshop, Andrew P.}, year={2019}, month={Sep}, pages={513–519} }
 @article{rothfuss_marsh_rovelli_petters_reid_2018, title={Condensation Kinetics of Water on Amorphous Aerosol Particles}, volume={9}, ISSN={["1948-7185"]}, DOI={10.1021/acs.jpclett.8b01365}, abstractNote={Responding to changes in the surrounding environment, aerosol particles can grow by water condensation changing rapidly in composition and changing dramatically in viscosity. The timescale for growth is important to establish for particles undergoing hydration processes in the atmosphere or during inhalation. Using an electrodynamic balance, we report direct measurements at −7.5, 0, and 20 °C of timescales for hygroscopic condensational growth on a range of model hygroscopic aerosol systems. These extend from viscous aerosol particles containing a single saccharide solute (sucrose, glucose, raffinose, or trehalose) and a starting viscosity equivalent to a glass of ∼1012 Pa·s, to nonviscous (∼10–2 Pa·s) tetraethylene glycol particles. The condensation timescales observed in this work indicate that water condensation occurs rapidly at all temperatures examined (<10 s) and for particles of all initial viscosities spanning 10–2 to 1012 Pa·s. Only a marginal delay (<1 order of magnitude) is observed for particles starting as a glass.}, number={13}, journal={JOURNAL OF PHYSICAL CHEMISTRY LETTERS}, author={Rothfuss, Nicholas E. and Marsh, Aleksandra and Rovelli, Grazia and Petters, Markus D. and Reid, Jonathan P.}, year={2018}, month={Jul}, pages={3708–3713} }
 @article{rothfuss_petters_2017, title={Characterization of the temperature and humidity-dependent phase diagram of amorphous nanoscale organic aerosols}, volume={19}, ISSN={["1463-9084"]}, DOI={10.1039/c6cp08593h}, abstractNote={The amorphous phase state diagram for sucrose aerosol is obtained from a mix of measurements and model calculations.}, number={9}, journal={PHYSICAL CHEMISTRY CHEMICAL PHYSICS}, author={Rothfuss, Nicholas E. and Petters, Markus D.}, year={2017}, month={Mar}, pages={6532–6545} }
 @article{demott_hill_petters_bertram_tobo_mason_suski_mccluskey_levin_schill_et al._2017, title={Comparative measurements of ambient atmospheric concentrations of ice nucleating particles using multiple immersion freezing methods and a continuous flow diffusion chamber}, volume={17}, number={18}, journal={Atmospheric Chemistry and Physics}, author={DeMott, P. J. and Hill, T. C. J. and Petters, M. D. and Bertram, A. K. and Tobo, Y. and Mason, R. H. and Suski, K. J. and McCluskey, C. S. and Levin, E. J. T. and Schill, G. P. and et al.}, year={2017}, pages={11227–11245} }
 @article{rothfuss_petters_2017, title={Influence of Functional Groups on the Viscosity of Organic Aerosol}, volume={51}, ISSN={["1520-5851"]}, DOI={10.1021/acs.est.6b04478}, abstractNote={Organic aerosols can exist in highly viscous or glassy phase states. A viscosity database for organic compounds with atmospherically relevant functional groups is compiled and analyzed to quantify the influence of number and location of functional groups on viscosity. For weakly functionalized compounds the trend in viscosity sensitivity to functional group addition is carboxylic acid (COOH) ≈ hydroxyl (OH) > nitrate (ONO2) > carbonyl (CO) ≈ ester (COO) > methylene (CH2). Sensitivities to group addition increase with greater levels of prior functionalization and decreasing temperature. For carboxylic acids a sharp increase in sensitivity is likely present already at the second addition at room temperature. Ring structures increase viscosity relative to linear structures. Sensitivities are correlated with analogously derived sensitivities of vapor pressure reduction. This may be exploited in the future to predict viscosity in numerical models by piggybacking on schemes that track the evolution of organic aerosol volatility with age.}, number={1}, journal={ENVIRONMENTAL SCIENCE & TECHNOLOGY}, author={Rothfuss, Nicholas E. and Petters, Markus D.}, year={2017}, month={Jan}, pages={271–279} }
 @article{martin_cornwell_atwood_moore_rothfuss_taylor_demott_kreidenweis_petters_prather_2017, title={Transport of pollution to a remote coastal site during gap flow from California's interior: impacts on aerosol composition, clouds, and radiative balance}, volume={17}, number={2}, journal={Atmospheric Chemistry and Physics}, author={Martin, A. C. and Cornwell, G. C. and Atwood, S. A. and Moore, K. A. and Rothfuss, N. E. and Taylor, H. and DeMott, P. J. and Kreidenweis, S. M. and Petters, M. D. and Prather, K. A.}, year={2017}, pages={1491–1509} }