J
Junfeng Zhen
Researcher at University of Science and Technology of China
Publications - 62
Citations - 984
Junfeng Zhen is an academic researcher from University of Science and Technology of China. The author has contributed to research in topics: Astrochemistry & Excited state. The author has an hindex of 16, co-authored 54 publications receiving 807 citations. Previous affiliations of Junfeng Zhen include University of Toulouse & Center for Excellence in Education.
Papers
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Journal ArticleDOI
Laboratory Formation of Fullerenes from PAHs: Top-down Interstellar Chemistry
Junfeng Zhen,Pablo Castellanos,D. M. Paardekooper,Harold Linnartz,Alexander G. G. M. Tielens +4 more
TL;DR: In this article, the photochemical evolution of large polycyclic aromatic hydrocarbons (PAHs) was investigated and it was shown that PAHs in excess of 60 C-atoms efficiently photo-isomerize to buckminsterfullerene, C60.
Journal ArticleDOI
Laboratory formation of fullerenes from PAHs: Top-down interstellar chemistry
Junfeng Zhen,Pablo Castellanos,D. M. Paardekooper,Harold Linnartz,Alexander G. G. M. Tielens +4 more
TL;DR: In this article, the photochemical evolution of large PAHs was investigated in the presence of strong UV sources, and it was shown that PAH in excess of 60 C-atoms can photo-isomerize to buckminsterfullerene.
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VUV photo-processing of PAH cations: quantitative study on the ionization versus fragmentation processes
Junfeng Zhen,Junfeng Zhen,Sarah Rodriguez Castillo,Sarah Rodriguez Castillo,Christine Joblin,Christine Joblin,Giacomo Mulas,Giacomo Mulas,Hassan Sabbah,Hassan Sabbah,Alexandre Giuliani,Laurent Nahon,Serge Martin,Jean-Philippe Champeaux,Paul M. Mayer +14 more
TL;DR: The measured photo-ionization yields for several PAH cations provide a necessary ingredient for detailed modeling of the stability and charge state of PAHs in the ISM in different environments, affecting in turn the chemistry, the energy balance, and the contribution ofPAHs to the extinction and emission curves.
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Quadrupole ion trap/time-of-flight photo-fragmentation spectrometry of the hexa-peri-hexabenzocoronene (HBC) cation
Junfeng Zhen,D. M. Paardekooper,Alessandra Candian,Harold Linnartz,Alexander G. G. M. Tielens +4 more
TL;DR: In this article, photo-fragments of the HBC cation were measured upon irradiation by an unfocused Nd:YAG laser (532nm) for different experimental conditions, using quadrupole ion trap, time-of-flight mass spectrometry.
Journal ArticleDOI
Photoinduced polycyclic aromatic hydrocarbon dehydrogenation The competition between H- and H2-loss
Pablo Castellanos,Alessandra Candian,Junfeng Zhen,Harold Linnartz,Alexander G. G. M. Tielens +4 more
TL;DR: In this paper, the first photofragmentation steps of polycyclic aromatic hydrocarbons (PAHs) are studied and the most likely photodissociation pathways for the molecules studied here are characterized.