Directly Probing the Effects of Ions on Hydration Forces at Interfaces,Journal of the American Chemical Society

当前位置： X-MOL 学术 › J. Am. Chem. Soc. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Directly Probing the Effects of Ions on Hydration Forces at Interfaces
Journal of the American Chemical Society ( IF 14.4 ) Pub Date : 2013-02-11 , DOI: 10.1021/ja310255s
Jason I. Kilpatrick ₁ , Siu-Hong Loh ₁ , Suzanne P. Jarvis ₁

Affiliation

Understanding the influence of water layers adjacent to interfaces is fundamental in order to fully comprehend the interactions of both biological and nonbiological materials in aqueous environments. In this study, we have investigated hydration forces at the mica-electrolyte interface as a function of ion valency and concentration using subnanometer oscillation amplitude frequency modulation atomic force microscopy (FM-AFM). Our results reveal new insights into the nature of hydration forces at interfaces due to our ability to measure high force gradients without instability and in the absence of lateral confinement due to the use of an atomically sharp tip. We demonstrate the influence of electrolytes on the properties of both primary and structural hydration forces and reveal new insights into the interplay between these phenomena in determining the interaction forces experienced by a nanoscale object approaching an interface. We also highlight the difficulty in directly comparing hydration force data from different measurement techniques where the nature of the perturbation induced by differing interaction geometries is likely to dramatically affect the results.

中文翻译：

直接探讨离子对界面水合力的影响

了解与界面相邻的水层的影响对于充分理解水环境中生物和非生物材料的相互作用至关重要。在这项研究中，我们使用亚纳米振荡幅度频率调制原子力显微镜 (FM-AFM) 研究了云母-电解质界面处的水合力作为离子价和浓度的函数。我们的结果揭示了对界面水合力性质的新见解，因为我们能够在不不稳定的情况下测量高力梯度，并且由于使用原子级尖尖而没有横向限制。我们证明了电解质对初级和结构水合力的性质的影响，并揭示了对这些现象之间相互作用的新见解，以确定纳米级物体接近界面时所经历的相互作用力。我们还强调了直接比较来自不同测量技术的水合力数据的困难，其中由不同的相互作用几何结构引起的扰动的性质可能会显着影响结果。

更新日期：2013-02-11

点击分享查看原文

点击收藏

阅读更多本刊新发论文本刊介绍/投稿指南