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- W2079168654 abstract "Dissociative adsorption of ammonia on the Si(100)-(2×1) surface has been investigated using the hybrid density functional B3LYP method and the Si9H12 one-dimer cluster model of the surface. The adsorption geometries and the reaction energetics from NH3(a) to NH2(a) and H(a) have been studied with Si basis sets varying from the standard all electron 6-31G(d) to the LanL2DZ with effective core potential, while keeping NH3 basis sets as 6-31G(d,p) in all cases. It was found that B3LYP/LanL2DZ is a reasonable level of theory for the calculations of not only the geometries, but also the reaction energetics. This provides a cost-effective way to extend the size of the Si cluster models and to study in details the energetics of the whole reaction path. Based on the experimental and theoretical results available, we recommend an “optimal” bond geometry of NH2(a) and H(a) on the Si(100)-(2×1) surface to be: Si–Si (symmetric dimer) 2.42 Å, Si–N 1.75 Å, Si–H 1.50 Å, N–H 1.01 Å, Si–Si–N 115°, Si-N-H 118°, Si–Si–H 111°, H–N–H 109°. The calculated results on the reaction energetics are in general agreement with the experimental findings as well as the previous theoretical ones." @default.
- W2079168654 created "2016-06-24" @default.
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- W2079168654 date "2001-05-01" @default.
- W2079168654 modified "2023-09-27" @default.
- W2079168654 title "NH<sub>3</sub>Dissociative Adsorption on Si(100)-(2×1) Surface: A B3LYP Quantum Chemical Cluster Model Study" @default.
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- W2079168654 doi "https://doi.org/10.1246/bcsj.74.817" @default.
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