Nanostructuration of polyaromatic analogues of the carbonaceous dust

Y. Carpentier; G. Féraud; E. Dartois; R. Brunetto; E. Charon; A.-T. Cao; L. d’Hendecourt; Ph. Bréchignac; J.-N. Rouzaud; T. Pino

doi:10.1051/eas/1258068

All issues

Volume 58 (2012)

EAS Publications Series, 58 (2012) 399-404

Abstract

Open Access

Issue		EAS Publications Series Volume 58, 2012 ECLA - European Conference on Laboratory Astrophysics


Page(s)		399 - 404
DOI		https://doi.org/10.1051/eas/1258068
Published online		13 February 2013

European Conference on Laboratory Astrophysics - ECLA
C. Stehlé, C. Joblin and L. d’Hendecourt (eds)
EAS Publications Series, 58 (2012) 399-404

Nanostructuration of polyaromatic analogues of the carbonaceous dust

Y. Carpentier¹^,2, G. Féraud¹, E. Dartois³, R. Brunetto³, E. Charon⁴, A.-T. Cao¹^,5, L. d’Hendecourt³, Ph. Bréchignac¹, J.-N. Rouzaud⁴ and T. Pino¹

¹ Institut des Sciences Moléculaires d’Orsay, CNRS – Univ. Paris Sud, UMR 8214, 91405 Orsay Cedex, France
² Present address : Laboratoire de Physique des Laser, Atomes et Molécules, Bât. P5 – USTL, 59655 Villeneuve d’Ascq Cedex, France
³ Institut d’Astrophysique Spatiale, CNRS – Univ. Paris-Sud 11, UMR 8617, 91405 Orsay Cedex, France
⁴ Laboratoire de Géologie, École Normale Supérieure, UMR CNRS 8538, 75231 Paris Cedex 5, France
⁵ Present address : Physics Department, University of Pedagogy of Ho Chi Minh City, Ho Chi Minh City, Viet Nam

Abstract

Carbonaceous cosmic dust is mainly observed through infrared spectroscopy either in absorption or in emission. Laboratory soot analogues of this interstellar or circumstellar dust were produced in fuel-rich, low-pressure, premixed and flat, flames. The particles were investigated by infrared absorption spectroscopy in the 2–15 μm spectral region. The details of the spectral features shed some light on the structure of the material and enable the study of its life cycle. In particular, the 8 μm band position is tentatively attributed to defects at the edge or in the polyaromatic units of the materials, revealing these structural changes in astrophysical dust.