Wu W, Panduro Vela D, Bück A, Fröba AP (2023)
Publication Language: English
Publication Status: Published
Publication Type: Journal article, Original article
Publication year: 2023
Publisher: Elsevier B.V.
Book Volume: 220
Article Number: 113321
DOI: 10.1016/j.measurement.2023.113321
The diffusion of nanoparticles in nanofluids in form of pendant drops and levitated droplets is characterized by dynamic light scattering. In combination with a heterodyne detection scheme, particle diffusivity in pendant drops can be determined by this method. The diffusivities therein correspond well to the values measured inside a cuvette. During evaporation, crust formation in the drop can also be identified by the method. Dynamic light scattering experiments for levitated droplets are performed with an ultrasonic acoustic levitator. Again, the dynamics of the particle number density fluctuations inside the droplet can be characterized, but the derivation of particle diffusivities is not yet possible. In both cases, the evolution of the characteristic time reflecting the diffusive process of nanoparticles can be determined until the point of crust formation. In summary, the applicability and limitation of dynamic light scattering for the characterization of diffusion of particles in evaporating drops are identified.
APA:
Wu, W., Panduro Vela, D., Bück, A., & Fröba, A.P. (2023). Characterization of nanofluids in evaporating droplets by dynamic light scattering. Measurement, 220. https://doi.org/10.1016/j.measurement.2023.113321
MLA:
Wu, Wenchang, et al. "Characterization of nanofluids in evaporating droplets by dynamic light scattering." Measurement 220 (2023).
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