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介电泳驱动纳米胶体分离的分子动力学模拟 被引量:3

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摘要 采用非平衡态分子动力学法对纳米胶体及其溶液环境进行建模,通过对模型系统施加非均匀电场,使胶体带有相反的极性.在较高的电场强度和较低的系统温度情况下介电泳驱动胶体分离的现象较为明显,对胶体的介电泳速度与溶剂粒子热运动速度比值进行研究,发现比值较大时,胶体与溶剂粒子的撞击较为剧烈,使得胶体的速度出现大幅度的波动.改变电场强度进行模拟,发现电场强度的增大能加快胶体的分离,但当电场强度增大到一定程度时,由于溶剂粒子对胶体的摩擦阻力很大,使得分离运动开始变慢.此外,在分析胶体位能的基础上研究胶体的分离原因,发现胶体电偶极化后胶体之间的吸引位能变小,而温度的升高使得吸引位能变小,排斥位能增大,这与DLVO理论得出的结论相一致.
出处 《中国科学(E辑)》 CSCD 北大核心 2009年第6期1152-1158,共7页 Science in China(Series E)
基金 国家高技术研究发展计划("863"计划)(批准号:2006AA04Z351) 国家自然科学基金(批准号:50675033 30770553)资助项目
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参考文献19

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同被引文献85

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  • 3刘泳宏,赵湛.基于NEMS技术的介电泳芯片及其关键工艺问题的研究[J].传感技术学报,2006,19(05B):1978-1982. 被引量:2
  • 4陈振乾,施明恒.微流动细胞颗粒中介电泳力的分析[J].工程热物理学报,2007,28(1):77-79. 被引量:3
  • 5程介克,黄卫华,王宗礼.单细胞分析的研究[J].色谱,2007,25(1):1-10. 被引量:4
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