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19830827木蟲 (小有名氣)
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[求助]
關(guān)于“密度泛函(DFT)”,幫忙翻譯一段話!
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本人不是搞理論計算的,現(xiàn)在寫論文需要用到密度泛函(DFT)的一些知識,哪位好心的蟲蟲能幫忙翻譯一下下面的一段話,鄙人不勝感激!可以直接回復(fù),發(fā)站內(nèi)信,也可以發(fā)送到我的郵箱:guzheng0827@163.com。本人收到來信后,一定奉上60金幣,如果翻譯得非常通順流暢,再贈送20金幣!十分感謝,辛苦了! DFT Calculations To investigate the energy and structural details of water, hydrogen and 1,3- butadiene on clean Au surface, all DFT calculations were performed with the program Dmol package in Materials Studio 4.3. The electronic structures were obtained by solving the Kohn-Sham (KS) equation self-consistently in the condition of spin unrestricted while the density functional theory was used for core electrons employing the PW91 generalized gradient approximation (GGA) to the exchange-correlation energy. Double-numeric quality basis set with polarization functions (DNP) was used. These methods were widely used in the past to study adsorption processes yielding reliable results both on adsorbents and metal surfaces. Geometry optimizations were performed with the convergence criterion of 0.004 Ha/Å for the gradient and 0.005 Å for the displacement. The metal surface was modeled by a periodical array of two-layered slabs separated by 10 Å of vacuum region. A (3×4) unit cell was chosen, which means a monolayer of adsorbates with coverage of 1/12 ML. The geometrical optimization including all degrees of freedom of adsorbates and the first layer of metal were considered. In this work, the adsorption energy (Qads) of species A on Au surface (M) is calculated according to the formula Qads(A) = EA/M-EM-EA, where E is the calculated total energy. |
木蟲 (小有名氣)
木蟲 (著名寫手)
| 第一句:采用Materials Studio 4.3中的Dmol程序包進(jìn)行DFT計算來研究干凈金表面上水、氫氣和1,3-丁二烯的能量(可能是自由能)和結(jié)構(gòu)特征。 |
木蟲 (小有名氣)
木蟲 (著名寫手)
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