Regensburg 2013 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

CPP: Fachverband Chemische Physik und Polymerphysik

CPP 34: Poster: Wetting, Micro and Nano Fluidics

CPP 34.12: Poster

Mittwoch, 13. März 2013, 16:30–18:30, Poster C

Laser interferometric observations of capillary rise in arrays of silicon nanochannels — •Mark Busch, Felix Koch, and Patrick Huber — Hamburg University of Technology, Hamburg, Germany

We present measurements on the capillary filling of nanochannels in mesoporous silicon films with organic solvents, polymers and epoxy resins. The time-dependent rise level of the liquids within the channels has been determined with laser interferometry [1]. This allows us to analyze the filling process with a high temporal (milliseconds) and spatial (micrometer) resolution. We found distinct changes in the imbibition dynamics as a function of the filling direction, from the top to the bottom or from the bottom to the top of the film. These peculiarities will be discussed with respect to a gradient in the porosity and/or a monotonic variation in the mean channel diameter as a function of channel length.

[1] L. Acquaroli et al.: Capillary Filling in Nanostructured Porous Silicon, Langmuir 27 (2011), No. 5, p. 2069-2072