Infrared spectroscopy and vibrational exciton modeling of crystalline, polycrystalline and amorphous acetylene aerosol particles

文献情報

出版日 2010-06-03

DOI 10.1039/C002525A

インパクトファクター 3.676

著者

Thomas C. Preston, George Firanescu, Ruth Signorell

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要旨

Mid-infrared spectra of acetylene aerosol particles generated under conditions relevant to Titan's atmosphere are analyzed in terms of the vibrational exciton model. The analysis reveals that acetylene aerosol particles do not form single crystals below 110 K as previously assumed. Instead, less ordered structures such as polycrystalline particles with orthorhombic crystalline domains or possibly partially amorphous particles derived from an orthorhombic crystal structure are found to be very stable. Annealing of these particles leads to the formation of crystalline particles with an orthorhombic crystal structure. Particles with a cubic crystal structure were never observed at these temperatures in agreement with the phase behavior of bulk acetylene.

掲載誌

Physical Chemistry Chemical Physics

CiteScore: 5.5

自己引用率: 10.3%

年間論文数: 3036

Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.