Nanomeniscus Forces in Undersaturated Vapors: Observable Limit of Macroscopic Characteristics
Nanomeniscus Forces in Undersaturated Vapors: Observable Limit of Macroscopic Characteristics
复制标题
不饱和蒸气中的纳米弯月面力：宏观特征的可观察极限
DOI：
10.1021/la011478z
复制
发表时间：
2002
期刊：
影响因子：
3.9
通讯作者：
Takahisa Kato
中科院分区：
文献类型：
--
作者：
H. Matsuoka;S. Fukui;Takahisa Kato
研制了一种能精确测量大气控制室中固体表面间表面力的装置。使用该装置测量了不同液体(碳氢化合物、醇和水)的不饱和蒸气中交叉柱状云母表面之间的表面力。表面力随液体相对蒸汽压的增大而逐渐变化，由干燥状态下的相对蒸汽压变为宏观的半月面力。为了研究固体表面之间的半月面桥的形成，作者引入了临界相对蒸汽压(p/ps)c，在这个临界相对蒸汽压下，表面粘附力接近宏观的半月面力。在这个临界相对蒸汽压下的开尔文半径是纳米级的，并且被发现依赖于分子的结构、分子质量和静电性质。
An apparatus which can accurately measure surface forces between solid surfaces in an atmospherecontrolled chamber has been developed. The surface forces between crossed-cylindrical mica surfaces were measured in undersaturated vapors of various liquids (hydrocarbons, alcohols, and water) using this apparatus. The surface forces changed gradually with an increase in the relative vapor pressure of liquid from those under dry conditions to macroscopic meniscus forces. To investigate the formation of the meniscus bridge between solid surfaces, the authors introduce the critical relative vapor pressure, (p/ps)c, at which the surface adhesive force approaches the macroscopic meniscus force. The Kelvin radius at this critical relative vapor pressure was on the nanometer level and was found to be dependent on the structure, molecular weight, and electrostatic nature of the molecules.