FORMATION OF PAHS AND CARBONACEOUS SOLIDS IN GAS-PHASE CONDENSATION EXPERIMENTS Export

@article{citeulike:4186512, abstract = {Carbonaceous grains represent a major component of cosmic dust. In order to understand their formation pathways, they have been prepared in the laboratory by gas-phase condensation reactions such as laser pyrolysis and laser ablation. Our studies demonstrate that the temperature in the condensation zone determines the formation pathway of carbonaceous particles. At temperatures lower than 1700K, the condensation by-products are mainly polycyclic aromatic hydrocarbons (PAHs), that are also the precursors or building blocks for the condensing soot grains. The low-temperature condensates contain PAH mixtures that are mainly composed of volatile 3-5 ring systems. At condensation temperatures higher than 3500K, fullerene-like carbon grains and fullerene compounds are formed. Fullerene fragments or complete fullerenes equip the nucleating particles. Fullerenes can be identified as soluble components. Consequently, condensation products in cool and hot astrophysical environments such as cool and hot AGB stars or Wolf Rayet stars should be different and should have distinct spectral properties.}, author = {Jager, C. and Huisken, F. and Mutschke, H. and Jansa, I. L. and Henning, Th}, citeulike-article-id = {4186512}, citeulike-linkout-0 = {http://arxiv.org/PS_cache/arxiv/pdf/0903/0903.0775v1.pdf}, keywords = {aromatic, astrochemistry, carbon, dust, hydrocarbons, molecules, polycyclic, soot}, posted-at = {2009-03-17 14:08:09}, priority = {2}, title = {FORMATION OF PAHS AND CARBONACEOUS SOLIDS IN GAS-PHASE CONDENSATION EXPERIMENTS}, url = {http://arxiv.org/PS_cache/arxiv/pdf/0903/0903.0775v1.pdf}, year = {2009} }

TY - JOUR ID - citeulike:4186512 L3 - citeulike-article-id:4186512 N2 - Carbonaceous grains represent a major component of cosmic dust. In order to understand their formation pathways, they have been prepared in the laboratory by gas-phase condensation reactions such as laser pyrolysis and laser ablation. Our studies demonstrate that the temperature in the condensation zone determines the formation pathway of carbonaceous particles. At temperatures lower than 1700K, the condensation by-products are mainly polycyclic aromatic hydrocarbons (PAHs), that are also the precursors or building blocks for the condensing soot grains. The low-temperature condensates contain PAH mixtures that are mainly composed of volatile 3-5 ring systems. At condensation temperatures higher than 3500K, fullerene-like carbon grains and fullerene compounds are formed. Fullerene fragments or complete fullerenes equip the nucleating particles. Fullerenes can be identified as soluble components. Consequently, condensation products in cool and hot astrophysical environments such as cool and hot AGB stars or Wolf Rayet stars should be different and should have distinct spectral properties. TI - FORMATION OF PAHS AND CARBONACEOUS SOLIDS IN GAS-PHASE CONDENSATION EXPERIMENTS KW - aromatic KW - astrochemistry KW - carbon KW - dust KW - hydrocarbons KW - molecules KW - polycyclic KW - soot AU - Jager, C AU - Huisken, F AU - Mutschke, H AU - Jansa, IL AU - Henning, Th PY - 2009/// UR - http://arxiv.org/PS_cache/arxiv/pdf/0903/0903.0775v1.pdf ER -