Influence of silica nanoparticles on nematic liquid crystal structural and electro-optical properties

Marek Veveričík (), Peter Bury, František Černobila, Natália Tomašovičová, Veronika Lacková, Dmytro Miakota, Katarína Kónyová, Milan Timko, Peter Kopčanský, Shie-Chang Jeng and Markéta Jarošová
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Marek Veveričík: Žilina University
Peter Bury: Žilina University
František Černobila: Žilina University
Natália Tomašovičová: Slovak Academy of Sciences
Veronika Lacková: Slovak Academy of Sciences
Dmytro Miakota: Slovak Academy of Sciences
Katarína Kónyová: Slovak Academy of Sciences
Milan Timko: Slovak Academy of Sciences
Peter Kopčanský: Slovak Academy of Sciences
Shie-Chang Jeng: National Yang Ming Chiao Tung University
Markéta Jarošová: Institute of Physics of Czech Academy of Sciences

The European Physical Journal B: Condensed Matter and Complex Systems, 2025, vol. 98, issue 10, 1-10

Abstract: Abstract The nematic 5CB liquid crystal composites with silica nanoparticles were studied using light transmission and surface acoustic wave (SAW) measurements. Several different kinds of hydrophobic aerosil were chosen as a source of silica nanoparticles. The synthesized colloidal systems exhibited a pronounced memory effect, as indicated by the hysteresis observed in both light transmission and surface acoustic wave (SAW) attenuation measurements within the nematic phase at ambient temperature. However, apparent influence of SiO2 surroundings following different aerosil sources for silica nanoparticles as dopants on the improvement of the memory effect was observed. Additional studies also showed on the influence of SiO2 surroundings on the threshold voltage as well as nematic-isotropic transition temperature. The potential application of appropriate composites could lead to the fabrication of electro-optical memory devices suitable for information storage applications. Graphical abstract The nematic 5CB liquid crystal composites with silica nanoparticles were studied using light transmission and surface acoustic wave (SAW) measurements. Several different kinds of hydrophobic aerosil were chosen as a source of silica nanoparticles. The synthesized colloidal systems exhibited a pronounced memory effect, as indicated by the hysteresis observed in both light transmission and surface acoustic wave (SAW) attenuation measurements within the nematic phase at ambient temperature. However, apparent influence of SiO2 surroundings following different aerosil sources for silica nanoparticles as dopants on the improvement of the memory effect was observed. Additional studies showed also on the influence of SiO2 surroundings on the threshold voltage as well as nematic-isotropic transition temperature. The potential application of appropriate composites could lead to the fabrication of electro-optical memory devices suitable for information storage applications. Summarization of light transmission dependences on electric field for all investigated 5CB composites doped with silica nanoparticles including pure 5CB (a) and schematic illustration of arrangement between silica nanoparticles and liquid crystal (b)

Date: 2025
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DOI: 10.1140/epjb/s10051-025-01051-9

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