液体水银在碳纳米管中传输的压力控制模型  

Pressure control model for transport of liquid mercury in carbon nanotubes

作　　者：张忠强[1] 张洪武[1] 王磊[1] 郑勇刚[1] 王晋宝[1] 

机构地区：[1]大连理工大学工程力学系,工业装备结构分析国家重点实验室,大连116024

出　　处：《物理学报》2008年第2期1019-1024,共6页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:10721062,10421202,10640420176);国家基础性发展规划项目(批准号:2005CB321704)资助的课题.~~

摘　　要：碳纳米管在纳米技术中有一个很重要的应用,就是它可以作为纳米管道传输液体.本文用分子动力学模拟方法,结合一个液体压力控制模型,对液体水银由于外部压力作用在碳纳米管中传输的现象进行研究.研究结果表明,当液体水银的内部压强超过一个临界值时,液体水银能够浸入到碳纳米管内部;不断增大液体内部的压强,碳纳米管可以连续地传输液体;而当对液体水银进行循环加压时,碳纳米管可以间断地传输液体水银.Carbon nanotubes have a significant application in nanotechnology as nanopipes conveying fluids. In this paper, a pressure control model for transport of liquid mercury through carbon nanotubes using classical molecular dynamics simulations in conjunction with an atomistic model is presented. Wetting of single-walled carbon nanotubes by mercury occurs above a threshold pressure of liquid mercury. The liquid mercury can be transported through carbon nanotubes with the continuous increase of its internal pressure. Also, we show that single-walled carbon nanotubes can transport liquid mercury discontinuously when a periodical pressure is applied on the liquid.

关 键 词：碳纳米管 流体传输 分子动力学 

分 类 号：TB383.1[一般工业技术—材料科学与工程]