The reaction of oleic acid monolayers with gas-phase ozone at the air water interface: the effect of sub-phase viscosity, and inert secondary components

Abstract

Reaction of gas-phase ozone with oleic acid monolayer at the air–water interface leaves no product film. Reaction kinetics change with surface coverage but not with addition of unreactive material or with change of viscosity of the water.

Ozonolysis of Oleic Acid Aerosol Revisited: Multiphase Chemical Kinetics and Reaction Mechanisms

“…Note here that most mass transport properties of the reaction system remained fixed in this inverse modeling study and a higher k BR1 could theoretically be realized if mass transport effects were limiting O 3 uptake into the particle or OL replenishment to the particle surface. Diffusion coefficients remained at the best guesses for unreacted oleic acid and it is possible that formation of oxidized and oligomeric products reduces the viscosity of the organic aerosol droplet, which may lead to mass transfer limitations. , We will further test this hypothesis in follow-up studies, however, a majority of the experiments show a fairly linear OL concentration–time profile, which does not suggest the onset of mass transport limitation over the course of the reaction.…”

“…Diffusion coefficients remained at the best guesses for unreacted oleic acid and it is possible that formation of oxidized and oligomeric products reduces the viscosity of the organic aerosol droplet, which may lead to mass transfer limitations. 57,58 We will further test this hypothesis in follow-up studies, however, a majority of the experiments show a fairly linear OL concentration−time profile, which does not suggest the onset of mass transport limitation over the course of the reaction.…”

Mie scattering from optically levitated mixed sulfuric acid–silica core–shell aerosols: observation of core–shell morphology for atmospheric science

“…Atmospheric films on liquid or solid aerosols have been studied previously [25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41][42] and inorganic coatings on atmospheric aerosol have also been investigated. 26,27,[43][44][45] For example, Rkiouak et al 26 applied Raman spectroscopy to follow the development of sulfuric acid films on silica aerosol, whilst Tang et al 44 studied the heterogeneous reaction of N 2 O 5 on silica particles.…”

“…Film development on atmospheric aerosols has previously been studied through application of optical trapping techniques. 26,27,38 For example, Jones et al 25 determined the refractive index change as a film of oleic acid developed on a silica aerosol. Organic coatings of liquid core particles with a mixture of organic materials (from the oxidation of a-pinene) have also been studied.…”

The impact of molecular self-organisation on the atmospheric fate of a cooking aerosol proxy

“…This is a long-standing discrepancy and suggests that some physical process is inhibiting the ageing of such aerosols. For these reasons, oleic acid has been the compound of choice for laboratory studies into aerosol heterogeneous oxidation (Gallimore et al, 2017;King et al, 2020;Milsom et al, 2021bMilsom et al, , 2021aPfrang et al, 2017;Woden et al, 2021;Zahardis and Petrucci, 2007).…”