Heterogeneous Ozonolysis of Squalene: Gas-Phase Products Depend on Water Vapor Concentration

Probing the Heterogeneous Ozonolysis of Squalene Nanoparticles by Photoemission.

The heterogeneous reaction of ozone (O3) with 200 nm squalene nanoparticles is studied using near-edge X-ray absorption fine structure (NEXAFS) and ultraviolet (UPS) and X-ray photoelectron spectroscopy (XPS). Photoelectrons are detected from free nanoparticle beams using a velocity map imaging (VMI) spectrometer capable of detecting photoelectrons with up to 40 eV of kinetic energy. Heterogene...

Gas-phase products and secondary aerosol yields from the ozonolysis of ten different terpenes

[1] The ozonolyses of six monoterpenes (a-pinene, b-pinene, 3-carene, terpinolene, a-terpinene, and myrcene), two sesquiterpenes (a-humulene and b-caryophyllene), and two oxygenated terpenes (methyl chavicol and linalool) were conducted individually in Teflon chambers to examine the gas-phase oxidation product and secondary organic aerosol (SOA) yields from these reactions. Particle size distri...

Appendix I Gas-Phase Products and Secondary Aerosol Yields from the Ozonolysis of Ten Different Terpenes

Dependence of particle nucleation and growth on high-molecular-weight gas-phase products during ozonolysis of α-pinene

We report the first time-dependent measurements of high-molecular-weight (up to 700 amu) gas-phase oxidation products from α-pinene ozonolysis in an aerosol chamber under dry and low-NOx conditions. Measurements of products having mole fractions ranging from 10−14 to 10−11 were carried out with a chemical ionization mass spectrometer (the Cluster CIMS). Most products that were correlated with n...

Acid-yield measurements of the gas-phase ozonolysis of ethene

K. E. Leather, M. R. McGillen, M. C. Cooke, S. R. Utembe, A. T. Archibald, M. E. Jenkin, R. G. Derwent, D. E. Shallcross, and C. J. Percival The Centre for Atmospheric Science, The School of Earth, Atmospheric and Environmental Science, The University of Manchester, Simon Building, Brunswick Street, Manchester, M13 9PL, UK Biogeochemistry Research Centre, School of Chemistry, The University of ...