化学物理
渗透
熵(时间箭头)
电位梯度
材料科学
粒子(生态学)
膜
热力学
化学
物理
生物化学
量子力学
海洋学
地质学
标识
DOI:10.1103/physrevlett.82.3552
摘要
We simulate constrained dynamics of two species transport across single-file molecular-sized pores such as biomembrane channels and zeolites. We focus on diffusional pumping where one type of particle uses its entropy of mixing to drive another along its chemical potential gradient. Quantitative analyses of rates and efficiencies of transport are plotted as functions of transmembrane potential, pore length, and particle-pore interactions. Our results qualitatively explain recent measurements of ``negative'' osmosis and suggest new, more systematic experiments, particularly with zeolites.
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