Technical difficulties with this site

We have been experiencing problems with our website hosting intermittently this summer.  We apologize if you have encountered any errors when trying to navigate around the site.  The issue should be resolved now, but please drop us an email or tweet if you have trouble with the site, so that we know if the problem has recurred.

– The McNeill Group

Formaldehyde and acetaldehyde change the surface of ice under polar snowpack conditions

We’re pleased to announce the publication of our latest research article as a Just Accepted manuscript in J. Phys. Chem. C.  This article is part of the John Hemminger Festschrift.

The interaction of volatile organics with ice is a major factor influencing atmospheric composition in Polar regions. We have shown for the first time that exposure to HCHO and CH3CHO induces changes in the ice surface state, including the formation of a disordered interfacial layer and opaque domains, at environmentally relevant conditions. These findings have significant implications for our understanding of the interactions of these trace gases with ice, and the interpretation of snow pit and ice core chemical records.

Kuo , M.-H., Moussa , S. G., and McNeill, V. F. Surface Disordering and Film Formation on Ice Induced by Formaldehyde and Acetaldehyde (2014) J. Phys. Chem. C, Just Accepted Manuscript.  DOI: 10.1021/jp504285z

 

New publication with collaborators at Northwestern U.

A new manuscript was published online today in Atmospheric Chemistry and Physics Discussions.  This work was the result of a collaboration with the Geiger and Thomson groups at Northwestern U. and Prof. McNeill.  The Northwestern team measured surface tension depression in aqueous aerosol mimics by isoprene oxidation products known to form secondary organic aerosol.  Surface tension depression is an indication of the formation of an organic film at the gas-aqueous interface, and has important implications for cloud formation and aerosol heterogeneous chemistry.

Climate-relevant physical properties of molecular constituents relevant for isoprene-derived secondary organic aerosol material

 

New McNeill Group Publication – Organic salt formation & impact on aerosol properties

We’re pleased to announce the publication of the final version of our manuscript, “Inorganic salts interact with oxalic acid in submicron particles to form material with low hygroscopicity and volatility” in Atmospheric Chemistry and Physics today.  The work is the result of an ongoing collaboration with the Nenes Group at Georgia Tech.  The first author, Greg Drozd, was a postdoc in the McNeill Group from 2011-2013, and he is currently at UC Berkeley.

Inorganic salts interact with oxalic acid in submicron particles to form material with low hygroscopicity and volatility
G. Drozd, J. Woo, S. A. K. Häkkinen, A. Nenes, and V. F. McNeill, Atmos. Chem. Phys., 14, 5205-5215, 2014. doi:10.5194/acp-14-5205-2014

 

Nobel Laureate Mario Molina Awarded UCSD Medal

This article in the UCSD News is a nice followup on the Mario Molina Symposium and Celebration, which was held last week at Scripps Institution of Oceanography.  Prof. McNeill has a quote:

“Mario has been an inspirational mentor and colleague to so many atmospheric chemists,” said Faye McNeill, a Columbia University professor and former student in Molina’s research group at MIT who helped organize the symposium with Prather. “The foundation of his work is truly visionary, elegant chemistry. But beyond this, Mario is a master science communicator. This has enabled him to translate atmospheric chemistry fundamentals into policy realities.”

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