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Wax deposition onto Fe2O3 surfaces

机译:蜡沉积到Fe2O3表面

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The deposition of wax onto hematite surfaces has been investigated using molecular dynamics simulations. This process has been modelled using n-octacosane (C-28) as a representative wax molecule and the (0001) and (10(1) over bar 2) hematite surfaces, which are believed to be the predominant Fe2O3 surfaces. The adsorption sites and corresponding energies have been determined and indicate that deposition is more favourable on the ( 0001) surface. Different crystalline structures are yielded on each surface, differing mainly in a rotation of the C-28 molecules about their long axis: the alkanes are tilted relative to the (0001) surface, but lie at to the (10(1) over bar 2) surface. Radial distribution functions show that the structure of the surface deposit is comparable with the C-28 crystal only on the (0001) Fe2O3 surface. An energetic analysis of both systems also indicates that the deposition process is more favourable on the ( 0001) surface. [References: 36]
机译:已经使用分子动力学模拟研究了蜡在赤铁矿表面上的沉积。已使用正辛烷(C-28)作为代表性蜡分子以及(0001)和(2条上的10(1))赤铁矿表面进行了建模,该表面被认为是主要的Fe2O3表面。已经确定了吸附位点和相应的能量,表明在(0001)表面上的沉积更有利。每个表面上产生不同的晶体结构,主要不同之处在于C-28分子绕其长轴旋转:烷烃相对于(0001)表面倾斜,但位于(2)条上的(10(1))上)表面。径向分布函数表明,仅在(0001)Fe2O3表面上,表面沉积物的结构与C-28晶体相当。对两个系统的能量分析还表明,在(0001)表面上的沉积过程更为有利。 [参考:36]

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