Berlin 2024 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 21: Poster II

CPP 21.7: Poster

Tuesday, March 19, 2024, 18:00–20:00, Poster E

Height Distribution of Microparticles in a Local-Light Driven Diffusioosmotic Flow — •Fabian Rohne — Institut für Physik und Astronomie, Karl-Liebknecht-Str.24-25, 14476 Potsdam-Golm

It has been demonstrated that separation of particles of equal size but different surface energies is possible by combination of local-light driven diffusioosmosis (local-LDDO) and microfluidic technology.[1] However, the local-LDDO causes lateral particle repulsion, which results in long-ranged particle-particle interactions observable by an increased horizontal and vertical distance. Here, we present how the height distribution influences drift motion distribution of microparticles along a pressure driven fluid flow, which depends on particle concentration, applied wavelength and fluid low.

[1] Bekir, M.; Sperling, M.; Vasquez Muñoz, D., Braksch, C.; Böker, A.; Lomadze, N.; Popescu, M. N., Santer, S. Advanced Materials 2023, 35, 2300358.

Keywords: Particle Separation; Surface Sensitive Separation; Lightresponsive Surfactants; Microfluidics