Theoretical contact angles on a nano-heterogeneous surface composed of parallel apolar and polar strips
Document Type
Article
Publication Date
6-30-2004
Department
Department of Materials Science and Engineering
Abstract
Neumann−Good's parallel strip model (J. Colloid Interface Sci. 1972, 38, 341) was used to analyze the contact angle hysteresis for a liquid on a heterogeneous surface composed of alternatively aligned horizontal apolar (θ = 70°) and polar (θ = 0°) strips. The critical size of the strip width, below which the contact angle hysteresis disappears, was determined on the basis of the analysis of the activation energy for wetting to be from 6 to 12 nm. This calculated value of the critical strip size is 1 order of magnitude smaller than that of 0.1 μm, which has been commonly considered as the limit of heterogeneity size causing the appearance of the contact angle hysteresis.
Publication Title
Langmuir
Recommended Citation
Feng, C.,
&
Drelich, J. W.
(2004).
Theoretical contact angles on a nano-heterogeneous surface composed of parallel apolar and polar strips.
Langmuir,
20(16), 6521-6964.
http://doi.org/10.1021/la0364587
Retrieved from: https://digitalcommons.mtu.edu/michigantech-p/9
Publisher's Statement
© 2004 American Chemical Society. Publisher's version of record: https://doi.org/10.1021/la0364587