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  • 1
    ISSN: 1572-8803
    Keywords: integrated computer simulation ; quantum chemistry ; density functional theory ; molecular dynamics ; embedded atom method ; atomic force microscopy simulation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The atomistic understanding of the structure, reactivity, and electronic properties of solid surfaces and interfaces are essential for the design of novel catalysts and electronics/photonics devices which have high-performance and unexplored properties. Computational chemistry is expected not only to rationalize the experimental results but also to predict new features. We have applied integrated computer simulation methods including quantum chemistry, periodic density functional theory, molecular dynamics, embedded atom method, and atomic force microscopy simulation to various topics related to solid surfaces and interfaces. In the present paper, we reviewed our recent activities on supported metal catalysts, metal clusters, atomic force microscopy simulation, high-temperature superconductors, tribology, Si semiconductor and V2O5 catalysts. Our activities also involve the generation of a lot of new computer simulation codes. We emphasize that the integrated computer simulation system provides not only methods for scientific studies but also a key technology for industrial innovations in research and development.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1572-9028
    Keywords: density functional calculations ; adsorption states of NO ; activation of NO ; precious metal clusters ; Ir ; Pt ; Au
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Adsorption and activation properties of precious metal clusters such as Ir, Pt, and Au toward NO were investigated by means of the density functional calculations. We focused on the geometrical features of model clusters such as the shape and the number of consisting atoms that could determine the ability for the adsorption and the activation of NO. We found that the order of the energetical stability of the adsorption states of NO can be described as Ir 〉 Pt 〉 Au. It depends on neither the shape of the pentaatomic clusters nor the number of atoms in the model clusters considered. The ability of the precious metal clusters for the activation of the N–O bond were also discussed from both vibrational and geometrical points of view. The substantial activation of the N–O bond was found on both the NO/Ir5 and the NO/Pt4 systems, indicating that the specific adsorption geometries enhance the ability for the activation of the N–O bond. These results indicate that the Ir cluster has the best properties for the adsorption and activation of NO.
    Type of Medium: Electronic Resource
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