Sedimentation of atoms in condensed matter: Theory
Sedimentation of atoms in condensed matter: Theory
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原子在凝聚态物质中的沉积：理论
DOI：
10.1080/01418619408242928
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发表时间：
1994
影响因子：
1.6
通讯作者：
T. Mashimo
中科院分区：
文献类型：
--
作者：
T. Mashimo
给出了加速场作用下多组分凝聚体系中原子或分子沉积的自洽方程。该理论建立在平均场近似、具有原子通量表达式的线性唯象矩阵定律和能斯特-爱因斯坦关系的基础上。因此，一致地考虑了溶质之间的自相互作用、密度变化、化学活性等影响。对于二组分和三组分系统，扩散方程被重写为简单有用的形式。这一理论可以立即用于常规的超速离心法，就像在生物化学中使用的那样。对二组分和三组分体系在离心场诱导下的原子沉积进行了平衡态数值分析，给出了在较宽的外能区内，在多种原子和化学条件下，浓度和密度随外能的变化规律。效果是..。
Abstract Self-consistent equations are presented for the sedimentation of atoms or molecules in multicomponent condensed systems under an acceleration field. The theory is constructed on the basis of a mean-field approximation, the linear phenomenological matrix law with an expression of atom fluxes and the Nernst-Einstein relation. Accordingly, the effects of the self-interaction between the solutes, the density change, the chemical activity, etc., were consistently taken into account. For two- and three-component systems, the diffusion equations were rewritten in simple useful forms. The theory can immediately be used in the conventional ultracentrifuge as used in biochemistry. A numerical analysis at equilibrium of the sedimentation of atoms induced by a centrifugal field was performed for two- and three-component systems, and the final distributions of concentrations and density were given via the external energy under several atomic and chemical conditions in a wide external energy region. The effect...