The mechanics of nanometre-scale molecular contacts.
The mechanics of nanometre-scale molecular contacts.
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纳米级分子接触的力学。
DOI：
10.1039/c2fd00133k
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发表时间：
2012
影响因子：
3.4
通讯作者：
Busuttil K
中科院分区：
文献类型：
--
作者：
Busuttil K
本文研究了液体混合物中的粘附相互作用和摩擦-载荷关系。对于氢键形成单分子膜在丙酮-庚烷混合物中的线性摩擦负载关系观察到在组合物，产生广泛的表面溶剂化。随着氢键受体在液体介质中的浓度降低，观察到可以使用DMT力学建模的非线性摩擦-载荷关系。这些观察是合理的假设，如其他人以前提出的，摩擦力是一个负载依赖项和剪切项的总和。的负载依赖项被发现是不变的粘附力，并表示在分子犁（表面的构象破坏）的能量耗散。剪切项由探针和表面之间的粘附相互作用产生，并且与氢键键合官能团之间的相互作用的自由能密切相关。非线性摩擦-载荷关系是“正常”的，其中线性表示出现异常弱粘附的行为的限制形式（例如，高度溶剂化的表面）。的溶剂依赖性的拉脱力和表面剪切强度的观察，使相互作用的官能团的热力学性质的预测。
The adhesive interactions and friction–load relationships have been investigated in liquid mixtures. For hydrogen bond-forming monolayers in acetone–heptane mixtures a linear friction–load relationship is observed at compositions that yield extensive surface solvation. As the concentration of the hydrogen bond acceptor in the liquid medium is reduced, non-linear friction–load relationships are observed that may be modelled using DMT mechanics. These observations are rationalized by assuming, as others have previously suggested, that the friction force is the sum of a load-dependent term and a shear term. The load-dependent term is found to be invariant with the adhesion force and represents energy dissipation in molecular ploughing (conformational disruption of the surface). The shear term results from adhesive interactions between the probe and the surface and correlates closely with the free energy of interaction between the hydrogen bonding functional groups. A non-linear friction–load relationship is “normal”, with linearity representing a limiting form of behaviour where unusually weak adhesion occurs (e.g. a highly solvated surface). Observations of the solvent-dependence of the pull-off force and the surface shear strength enable the prediction of thermodynamic properties of the interacting functional groups.
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影响因子：
3.9
作者：
Alan B. Tutein;A. Stuart;J. Harrison
通讯作者：
Alan B. Tutein;A. Stuart;J. Harrison
使用摩擦力显微镜定量动力学测量三氟乙酸酐对巯基十一醇自组装单层的酯化。
DOI：
10.1021/la900741y
发表时间：
2009
期刊：
Langmuir : the ACS journal of surfaces and colloids
影响因子：
--
作者：
T. Whittle;G. Leggett
通讯作者：
G. Leggett
化学力显微镜：探测界面力和粘附力的化学起源
影响因子：
2.3
作者：
D. Vezenov;A. Noy;P. Ashby
通讯作者：
P. Ashby
影响因子：
3.3
作者：
Brewer, NJ;Janusz, S;Leggett, GJ
通讯作者：
Leggett, GJ
影响因子：
3.9
作者：
Ben D. Beake and;G. Leggett
通讯作者：
Ben D. Beake and;G. Leggett