title: Dust evolution, a global view I. Nanoparticles, nascence, nitrogen and natural selection … joining the dots.
abstract: The role and importance of nanoparticles for interstellar chemistry and beyond is explored within the framework ofThe Heterogeneous dust Evolution Model for Interstellar Solids(THEMIS), focusing on their active surface chemistry, the effects of nitrogen doping and the natural selection of interesting nanoparticle sub-structures. Nanoparticle-driven chemistry, and in particular the role of intrinsic epoxide-type structures, could provide a viable route to the observed gas phase OH in tenuous interstellar clouds en route to becoming molecular clouds. The aromatic-rich moieties present in asphaltenes probably provide a viable model for the structures present within aromatic-rich interstellar carbonaceous grains. The observed doping of such nanoparticle structures with nitrogen, if also prevalent in interstellar dust, could perhaps have important and observable consequences for surface chemistry and the formation of precursor pre-biotic species.
authors.affiliation: Institut d'Astrophysique Spatiale, CNRS , Univ. Paris-Sud, Université Paris-Saclay , Bât. 121, 91405 Orsay cedex, France.
authors.forename: A P
authors.identifier: 0000-0003-0577-6425
authors.initials: AP
authors.lastname: Jones
keywords: interstellar dust; interstellar medium; interstellar molecules