Effect of local curvature on the interaction between hydrophobic surfaces

P.M. Hansson, A. Swerin, E. Thormann, Per Claesson, J. Schoelkopf, P.A.C. Gane

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Abstract

Surface structure, including roughness and chemical heterogeneities, is known to be of importance for the surface interaction forces observed between hydrophobic and superhydrophobic surfaces. In this study, silica particles have been used to prepare structured particulated surfaces with a controlled roughness using Langmuir-Blodgett deposition or a drop coating technique. The surfaces were characterized by SEM and AFM. The AFM colloidal probe technique was employed for probing the interaction between a micro-size hydrophobic particle and hydrophobic surfaces with a sintered and silanized nano-sized silica particle monolayer. These measurements indicate that the adhesion force is increased by a decrease in particle size. Larger roughness gives larger crevices on the surface and more air/vapor accumulation but the capillary growth is impaired since the three-phase line (solid-liquid-air) has to move over a longer distance with an increase in the size of the surface features.
Original languageEnglish
Title of host publicationNanotech Conference & Expo 2010 : An Interdisciplinary Integrative Forum on Nanotechnology, Biotechnology and Microtechnology
Publication date2010
Pages61-64
ISBN (Print)978-1-4398-3418-3
Publication statusPublished - 2010
Externally publishedYes
EventNanotech Conference and Expo 2010: An Interdisciplinary Integrative Forum on Nanotechnology, Biotechnology and Microtechnology - Anaheim, CA, United States
Duration: 21 Jun 201024 Jun 2010

Conference

ConferenceNanotech Conference and Expo 2010
CountryUnited States
CityAnaheim, CA
Period21/06/201024/06/2010

Keywords

  • Blood vessels
  • Films
  • Hydrophobicity
  • Monolayers
  • Nanotechnology
  • Silica
  • Sintering
  • Surface chemistry
  • Surface properties
  • Surface structure
  • Surface roughness

Cite this

Hansson, P. M., Swerin, A., Thormann, E., Claesson, P., Schoelkopf, J., & Gane, P. A. C. (2010). Effect of local curvature on the interaction between hydrophobic surfaces. In Nanotech Conference & Expo 2010: An Interdisciplinary Integrative Forum on Nanotechnology, Biotechnology and Microtechnology (pp. 61-64)