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Environmental Applications of Semiconductor Photocatalysis
The civilian, commercial, and defense sectors of most advanced industrialized nations are faced with a tremendous set of environmental problems related to the remediation of hazardous wastes,…
Phase Transitions of Aqueous Atmospheric Particles.
- S. Martin
- ChemistryChemical reviews
- 30 August 2000
Using elemental ratios to predict the density of organic material composed of carbon, hydrogen, and oxygen.
A governing equation was developed to predict the density ρ(org) of organic material composed of carbon, oxygen, and hydrogen using the elemental ratios O:C and H:C as input parameters and has an accuracy of 12% for more than 90% of the 31 atmospherically relevant compounds used in the training set.
Prompt deliquescence and efflorescence of aerosol nanoparticles
Literature reports have differed on the possibilities of discontinuous and continuous (i.e., prompt and nonprompt) deliquescence and efflorescence of aerosol particles in the nanosize regime.…
Cloud condensation nuclei in pristine tropical rainforest air of Amazonia: size-resolved measurements and modeling of atmospheric aerosol composition and CCN activity
Atmospheric aerosol particles serving as cloud condensation nuclei (CCN) are key elements of the hydro- logical cycle and climate. We have measured and charac- terized CCN at water vapor…
Viscosity of α-pinene secondary organic material and implications for particle growth and reactivity
- Lindsay Renbaum-Wolff, James W. Grayson, A. Bertram
- Environmental ScienceProceedings of the National Academy of Sciences
- 1 April 2013
The viscosity of the water-soluble component of SOM produced by α-pinene ozonolysis is quantified and may be comparable to that of honey at 90% relative humidity, implying that the studied SOM ranges from liquid to semisolid or solid across the range of atmospheric RH.
Particle-phase chemistry of secondary organic material: modeled compared to measured O:C and H:C elemental ratios provide constraints.
- Qi Chen, Yingjun Liu, N. Donahue, J. Shilling, S. Martin
- Environmental ScienceEnvironmental science & technology
- 11 May 2011
The measurement-model gap was small for particle mass yield but significant for particle-average elemental composition, suggesting that a key chemical pathway is missing from the chemical mechanism.
Loading-dependent elemental composition of α-pinene SOA particles
Abstract. The chemical composition of secondary organic aerosol (SOA) particles, formed by the dark ozonolysis of α-pinene, was characterized by a high-resolution time-of-flight aerosol mass…
Nanosize Effect on the Deliquescence and the Efflorescence of Sodium Chloride Particles
The deliquescence and efflorescence relative humidity values of 6- to 60-nm NaCl particles were measured using a tandem nano-Differential Mobility Analyzer. The deliquescence relative humidity (DRH)…
Nanosize effect on the hygroscopic growth factor of aerosol particles
The hygroscopic growth factors of NaCl particles having dry mobility diameters of 6 to 60 nm were measured using a tandem nano‐Differential Mobility Analyzer. The growth factors steadily decreased…