20.500.12556/DKUM-91975 Dynamics and pretransitional effects in C60 fullerene nanoparticles and liquid crystalline dodecylcyanobiphenyl (12CB) hybrid system The report shows the strong impact of fullerene C60 nanoparticles on phase transitions and complex dynamics of rod-like liquid crystal dodecylcyanobiphenyl (12CB), within the limit of small concentrations. Studies were carried out using broadband dielectric spectroscopy (BDS) via the analysis of temperature dependences of the dielectric constant, the maximum of the primary loss curve, and relaxation times. They revealed a strong impact of nanoparticles, leading to a ~20% change of dielectric constant even at x = 0.05% of C60 fullerene. The application of the derivative-based and distortion-sensitive analysis showed that pretransitional effects dominate in the isotropic liquid phase up to 65 K above the clearing temperature and in the whole Smectic A mesophase. The impact of nanoparticles on the pretransitional anomaly appearance is notable for the smectic–solid phase transition. The fragility-based analysis of relaxation times revealed the universal pattern of its temperature changes, associated with scaling via the “mixed” (“activated” and “critical”) relation. Phase behavior and dynamics of tested systems are discussed within the extended Landau–de Gennes–Ginzburg mesoscopic approach. nanoparticles liquid crystals soft materials fullerenes dielectric spectroscopy phase transitions dynamics nanodelci tekoči kristali mehki materiali fulereni dielektrična spektroskopija fazni prehodi dinamika true false true MDPI Angleški jezik Slovenski jezik Znanstveno delo 2025-03-10 08:02:27 2025-03-10 08:53:25 2025-03-11 03:11:59 0000-00-00 00:00:00 2020 0 0 Str. 1-16 št. 12, št. članka 2343 Letn. 10 Dec. 2020 0000-00-00 Zaloznikova Objavljeno NiDoloceno 2020-10-21 2020-11-16 2020-11-26 532.783 47475971 10.3390/nano10122343 2079-4991 Rzoska-2020-Dynamics_and_Pretransitional_Effec.pdf Rzoska-2020-Dynamics_and_Pretransitional_Effec.pdf 1 F7081EE2871312A56650D9C2C2ABDC0A 97df0d672729ccdf6c552b453372ad85ba2d4f4907bb6beba370ec6143ce0ca3 9f951092-fd84-11ef-b09f-00155d000105 https://dk.um.si/Dokument.php?lang=slv&id=189068 https://doi.org/10.3390/nano10122343 0 a815fed0-fd84-11ef-b09f-00155d000105 https://dk.um.si/Dokument.php?lang=slv&id=189069 Fakulteta za naravoslovje in matematiko 0 0 0