Constrained droplet eigenfrequency approach in nanodroplets research

Nikolay N. Zografov; Rasim Bekir; Gergana M. Mihova; Iglika M. Dimitrova; Andreana I. Andreeva

doi:10.1117/12.2552186

30 December 2019 Constrained droplet eigenfrequency approach in nanodroplets research

Nikolay N. Zografov, Rasim Bekir, Gergana M. Mihova, Iglika M. Dimitrova, Andreana I. Andreeva

Proceedings Volume 11332, International Conference on Quantum, Nonlinear, and Nanophotonics 2019 (ICQNN 2019); 1133209 (2019) https://doi.org/10.1117/12.2552186
Event: International Conference on Quantum, Nonlinear, and Nanophotonics 2019 (ICQNN 2019), 2019, Sofia, Bulgaria

Abstract

Forced droplet oscillations are used as a tool for study or manipulating the droplet behavior and as well the properties of the liquid-gas interface¹. Resonant droplet tensiometry (RDT) is an experimental technique that uses a frequency modulated dielectrophoretic force to excite axisymmetric resonant oscillations in supported liquid droplets. Depends on the force amplitude and geometry of the electric field applied, RDT is capable to generate surface capillary waves only or to drive the entire bulk of the liquid droplet². Constrained droplet eigenfrequency strongly depends on the contact-line properties and thus determines the resonant frequency. This work is dedicated to our study of weak capillary oscillations of supported spherical droplets with fixed (static, anchored) contact-line. Our recent experiments with pendant microdroplets show a strong correlation between the theoretically calculated eigenfrequency³ and our RDT experimental results⁴. This led us to propose the idea for the eigenfrequency approach in the nanodroplets research. We also analyze the future application of surface plasmon resonance, caused by capillary waves of oscillating nanodroplet⁵, as a possible solution for nanodroplet resonant frequency detection in RDT.

Citation Download Citation

Nikolay N. Zografov, Rasim Bekir, Gergana M. Mihova, Iglika M. Dimitrova, and Andreana I. Andreeva "Constrained droplet eigenfrequency approach in nanodroplets research", Proc. SPIE 11332, International Conference on Quantum, Nonlinear, and Nanophotonics 2019 (ICQNN 2019), 1133209 (30 December 2019); https://doi.org/10.1117/12.2552186

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