Polycyclic Aromatic Hydrocarbons and Fullerenes as Decomposition Products of Hydrogenated Amorphous Carbon

1997 ◽  
Vol 489 (2) ◽  
pp. L193-L195 ◽  
Author(s):  
A. Scott ◽  
W. W. Duley ◽  
G. P. Pinho
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Amorphous Carbon ◽  
Aromatic Hydrocarbons ◽  
Decomposition Products ◽  
Hydrogenated Amorphous Carbon ◽  
Polycyclic Aromatic ◽  
Hydrogenated Amorphous

Raman spectra of submicron amorphous carbon grains and mixtures of polycyclic aromatic hydrocarbons

1988 ◽  
Vol 28 (6) ◽  
pp. 383-388 ◽  
Author(s):  
A. Blanco ◽  
E. Bussoletti ◽  
L. Colangeli ◽  
S. Fonti ◽  
V. Orofino
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Raman Spectra ◽  
Amorphous Carbon ◽  
Aromatic Hydrocarbons ◽  
Polycyclic Aromatic

scholarly journals Dust in planetary nebulae

2016 ◽  
Vol 12 (S323) ◽  
pp. 121-127
Author(s):  
G. C. Sloan
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Amorphous Carbon ◽  
Infrared Spectra ◽  
Aromatic Hydrocarbons ◽  
Planetary Nebulae ◽  
Emission Feature ◽  
Asymptotic Giant Branch ◽  
Strong Emission ◽  
Polycyclic Aromatic ◽  
Central Stars

AbstractInfrared spectra from the Spitzer Space Telescope trace the evolution of carbon-rich dust from the asymptotic giant branch (AGB) to young planetary nebulae (PNe). On the AGB, amorphous carbon dominates the dust, but SiC and MgS also appear. In more evolved systems with warmer central stars, the spectra reveal the unidentified 21 μm feature, features from aliphatic hydrocarbons, and spectra from polycyclic aromatic hydrocarbons (PAHs), often with shifted feature positions indicative of the presence of aliphatics. More evolved systems with hot central stars show more typical PAH spectra, along with fullerenes and/or an emission feature known as the big-11 feature at ~11 μm. This features arises from a combination of SiC and PAHs, and it is usually accompanied by a shoulder at 18 μm, which while unidentified might be from cool silicate grains. The strong emission from MgS and SiC in young PNe probably arises from coatings on carbonaceous grains.

The Assessment of Contamination and Source of Polycyclic Aromatic Hydrocarbons from the Sediments of the Someş River

2019 ◽  
Vol 64 (1) ◽  
pp. 55-67
Author(s):  
Vlad Pӑnescu ◽  
◽  
Mihaela Cӑtӑlina Herghelegiu ◽  
Sorin Pop ◽  
Mircea Anton ◽  
...  
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Polycyclic Aromatic
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