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| DOI | 10.1073/PNAS.2019873118 |
| Thermodynamics of interfaces extended to nanoscales by introducing integral and differential surface tensions | |
| Dong W. | |
| 发表日期 | 2021 |
| ISSN | 00278424 |
| 卷号 | 118期号:3 |
| 英文摘要 | As a system shrinks down in size, more and more molecules are found in its surface region, so surface contribution becomes a large or even a dominant part of its thermodynamic potentials. Surface tension is a venerable scientific concept; Gibbs defined it as the excess of grand potential of an inhomogeneous system with respect to its bulk value per interface area [J. W. Gibbs, “The Collected Works” in Thermodynamics (1928), Vol. 1]. The mechanical definition expresses it in terms of pressure tensor. So far, it has been believed the two definitions always give the same result. We show that the equivalence can break down for fluids confined in narrow pores. New concepts of integral and differential surface tensions, along with integral and differential adsorptions, need to be introduced for extending Gibbs thermodynamics of interfaces. We derived two generalized Gibbs adsorption equations. These concepts are indispensable for an adequate description of nanoscale systems. We also find a relation between integral surface tension and Derjaguin's disjoining pressure. This lays down the basis for measuring integral and differential surface tensions from disjoining pressure by using an atomic force microscope. © 2021 National Academy of Sciences. All rights reserved. |
| 英文关键词 | Fluids confined in a slit pore; Surface tension at fluid-solid interfaces; Thermodynamics of nanoscale systems |
| 语种 | 英语 |
| 来源期刊 | Proceedings of the National Academy of Sciences of the United States of America
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| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/181004 |
| 作者单位 | Université de Lyon, CNRS, Ecole Normale Supérieure de Lyon, Université Lyon 1, Laboratoire de Chimie, UMR 5182, Lyon Cedex 07, 69364, France; College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, China |
| 推荐引用方式 GB/T 7714 | Dong W.. Thermodynamics of interfaces extended to nanoscales by introducing integral and differential surface tensions[J],2021,118(3). |
| APA | Dong W..(2021).Thermodynamics of interfaces extended to nanoscales by introducing integral and differential surface tensions.Proceedings of the National Academy of Sciences of the United States of America,118(3). |
| MLA | Dong W.."Thermodynamics of interfaces extended to nanoscales by introducing integral and differential surface tensions".Proceedings of the National Academy of Sciences of the United States of America 118.3(2021). |
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