Faculty Publications

Title

Influence of trace aromatics on the chemical growth mechanisms of Titan aerosol analogues

Document Type

Article

Keywords

LDMS, PAHs, Polymer, Tholins, Titan aerosols

Journal/Book/Conference Title

Planetary and Space Science

Volume

140

First Page

27

Last Page

34

Abstract

The chemical structure and formation pathways of Titan aerosols remain largely unknown. In this work, we studied the effect of trace aromatics on the chemical composition and formation pathways of laboratory analogues of Titan's organic aerosols. The aerosol analogues were produced using four different trace aromatic molecules, comprised of one or two aromatic rings, each with or without a nitrogen heteroatom. Samples were then analyzed by laser desorption/ionization Mass Spectrometry (LDMS), revealing a high variability in the sample composition depending on the trace aromatic used. Our work reveals that the final chemical structure of the aerosols depends strongly on the number of aromatic rings in the trace molecule, leading either to a polymeric or to a random co-polymeric growth of the sample. These different chemical structures can affect the physical properties of the aerosol. Future analysis of Titan's aerosols using better resolution could potentially determine whether either of the growth hypotheses are preferred.

Original Publication Date

6-1-2017

DOI of published version

10.1016/j.pss.2017.03.012

Repository

UNI ScholarWorks, Rod Library, University of Northern Iowa

Language

en

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