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Creators/Authors contains: "Máthé, Marcell Tibor"

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  1. ; ; ; ; ; ; (, Journal of Molecular Liquids)
    Free, publicly-accessible full text available June 1, 2026
  2. ; ; ; ; (, Giant)
    Free, publicly-accessible full text available April 1, 2026
  3. ; ; ; ; (, Journal of Molecular Liquids)
    Free, publicly-accessible full text available November 1, 2025
  4. ; ; ; ; (, Nature communications)
    Ferroelectric nematic liquid crystals are fluids exhibiting spontaneous electric polarization, which is coupled to their long range orientational order. Due to their inherent property of making bound and surface charges, the free surface of ferroelectric nematics becomes unstable in electric fields. Here we show that ferroelectric liquid bridges between two electrode plates undergo distinct interfacial instabilities. In a specific range of frequency and voltage, the ferroelectric fluid bridges move as active interacting particles resembling living organisms like swarming insects, microbes or microrobots. The motion is accompanied by sound emission, as a consequence of piezoelectricity and electrostriction. Statistical analysis of the active particles reveals that the movement can be controlled by the applied voltage, which implies the possible application of the system in new types of microfluidic devices. 
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    Accepted Manuscript Full Text Available
  5. ; ; ; ; ; (, Scientific Reports)
    Abstract Studies of sessile droplets and fluid bridges of a ferroelectric nematic liquid crystal in externally applied electric fields are presented. It is found that above a threshold, the interface of the fluid with air undergoes a fingering instability or ramification, resembling to Rayleigh-type instability observed in charged droplets in electric fields or circular drop-type instabilities observed in ferromagnetic liquids in magnetic field. The frequency dependence of the threshold voltage was determined in various geometries. The nematic director and ferroelectric polarization direction was found to point along the tip of the fingers that appear to repel each other, indicating that the ferroelectric polarization is essentially parallel to the director. The results are interpreted in connection to the Rayleigh and circular drop-type instabilities. 
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