Measuring Contact Angles of Small Spherical Particles at Planar Fluid Interfaces by Light Extinction

Condensed Matter journal club

Measuring Contact Angles of Small Spherical Particles at Planar Fluid Interfaces by Light Extinction

  • Event time: 11:30am until 12:30pm
  • Event date: 15th December 2017
  • Speaker: (School of Physics & Astronomy, University of Edinburgh)
  • Location: 2511

Event details

An experimental technique is introduced for measuring the contact angle of small colloidal particles at planar fluid interfaces. The presented light scattering-based method relies on performing two spectral transmittance measurements: one on a particle monolayer standing at the fluid interface and the other on a dispersion of the same particles in a homogeneous medium. The observed shift between the two transmitted spectra is explained in terms of the phase shift parameter, which is then used to determine the particle position relative to the interface and hence the contact angle. The applicability of the technique is demonstrated through simulations and experiments.

Event resources

About Condensed Matter journal club

Given the diversity of research in the CM group, chosen topics vary widely. We tend to stick to high-impact journals - Nature, Science, PNAS and PRL have been popular - but this is not prescriptive..

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