Odd and even model self-assembled monolayers: links between friction and structure.
Odd and even model self-assembled monolayers: links between friction and structure.
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奇数和偶数模型自组装单层：摩擦与结构之间的联系。
DOI：
10.1021/la052044x
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发表时间：
2005
期刊：
影响因子：
--
通讯作者：
J. Harrison
中科院分区：
文献类型：
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作者：
P. Mikulski;Lawrence A. Herman;J. Harrison
用经典分子动力学模拟研究了无定形碳针尖与两个正构烷烃单分子膜之间的摩擦。这两个单层具有相同的堆积密度，但构成每个单层的链的长度相差一个-CH 2-单元。模拟结果表明，由C13链组成的单层比由C14链组成的单层在沿链斜面方向滑动时具有更高的摩擦力;随着载荷的增加，摩擦力的差异变得更加明显。检查链和尖端之间的接触力，沿着两种链类型之间的构象差异，有助于了解摩擦差异。
The friction between an amorphous carbon tip and two n-alkane monolayers has been examined using classical molecular dynamics simulations. The two monolayers have the same packing density, but the chains comprising each monolayer differ in length by one -CH2- unit. The simulations show that the monolayers composed of C13 chains have higher friction than those composed of C14 chains when sliding in the direction of chain cant; the difference in friction becomes more pronounced as the load is increased. Examination of the contact forces between the chains and the tip, along with conformational differences between the two chain types, lends insight into the friction differences.