%0 Journal Article
%T Calibration Routine for Quantitative Three-Dimensional Flow Field Measurements in Drying Polymer Solutions Subject to Marangoni Convection
%A Fabian Kr£¿hl
%A Max T£¿nsmann
%A Philip Scharfer
%A Philipp Cavadini
%A Wilhelm Schabel
%J -
%D 2019
%R https://doi.org/10.3390/colloids3010039
%X Abstract Surface-tension induced flows may have a significant impact on the surface topography of thin films or small printed structures derived from polymer solution processing. Despite a century of research on Marangoni convection, the community lacks quantitative experimental flow field data, especially from within drying solutions. We utilize multifocal micro particle tracking velocimetry (¦ÌPTV) to obtain these data and show a calibration routine based on point spread function (PSF) simulations as well as experimental data. The results account for a varying sample refractive index, beneficial cover-glass correction collar settings as well as a multifocal lens system. Finally, the calibration procedure is utilized exemplarily to reconstruct a three-dimensional, transient flow field within a poly(vinyl acetate)-methanol solution dried with inhomogeneous boundary conditions. View Full-Tex
%K micro particle tracking velocimetry
%K flow field
%K Marangoni convection
%K surface deformation
%K coffee ring effect
%K film drying
%K fluorescence microscopy
%K point spread function
%U https://www.mdpi.com/2504-5377/3/1/39