Soft matter interactions at the molecular scale: interaction forces and energies between single hydrophobic model peptides.
Soft matter interactions at the molecular scale: interaction forces and energies between single hydrophobic model peptides.
复制标题
分子尺度的软物质相互作用:单个疏水模型肽之间的相互作用力和能量
DOI:
10.1039/c6cp07562b
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发表时间:
--
期刊:
影响因子:
--
通讯作者:
M. Valtiner
中科院分区:
文献类型:
--
作者:
P. Stock;T. Utzig;M. Valtiner
In all realms of soft matter research a fundamental understanding of the structure/property relationships based on molecular interactions is crucial for developing a framework for the targeted design of soft materials. However, a molecular picture is often difficult to ascertain and yet essential for understanding the many different competing interactions at play, including entropies and cooperativities, hydration effects, and the enormous design space of soft matter. Here, we characterized for the first time the interaction between single hydrophobic molecules quantitatively using atomic force microscopy, and demonstrated that single molecular hydrophobic interaction free energies are dominated by the area of the smallest interacting hydrophobe. The interaction free energy amounts to 3–4 kT per hydrophobic unit. Also, we find that the transition state of the hydrophobic interactions is located at 3 Å with respect to the ground state, based on Bell–Evans theory. Our results provide a new path for understanding the nature of hydrophobic interactions at the single molecular scale. Our approach enables us to systematically vary hydrophobic and any other interaction type by utilizing peptide chemistry providing a strategic advancement to unravel molecular surface and soft matter interactions at the single molecular scale.
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影响因子:
3.4
作者:
Evans, E;Ritchie, K
通讯作者:
Ritchie, K
影响因子:
--
作者:
Jarzynski, Christopher
通讯作者:
Jarzynski, Christopher
影响因子:
3.4
作者:
Hammer MU;Anderson TH;Chaimovich A;Shell MS;Israelachvili J
通讯作者:
Israelachvili J
DOI:
10.1103/physreve.88.052313
发表时间:
2013
期刊:
Physical review. E, Statistical, nonlinear, and soft matter physics
影响因子:
--
作者:
Aviel Chaimovich;M. Shell
通讯作者:
M. Shell
DOI:
--
发表时间:
2016
期刊:
影响因子:
--
作者:
Nicole Yunger Halpern;C. Jarzynski
通讯作者:
C. Jarzynski