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- W2078714261 abstract "The complex specific heat is measured over a wide temperature range for the liquid crystal (LC) 4-cyano-4-octylbiphenyl (8CB) and cadmium sulfate quantum dots (QDs) composites as a function of QD concentration. The thermal scans were performed under near-equilibrium conditions for all samples having QDs weight percent (φw) from 0 to 3wt% over a wide range of temperature well above and below the two transitions in pure 8CB. Isotropic (I) to nematic (N) and nematic to smectic-A (SmA) phase transitions evolve in character and their transition temperatures offset by (∼2.3 to 2.6 K) lower for all composite samples as compared to that in pure 8CB. The enthalpy change associated with I–N phase transitions shows slightly different behavior on heating and cooling and it also shows crossover behavior at lower and higher QD content. The enthalpy change associated with N–SmA phase transitions is independent of QD loading and thermal treatment. Given the homogeneous and random distribution of QD in these nanocomposites, we interpret that these results as arising that the nematic phase imposes self-assembly on QDs to form one-dimensional arrays leading to QDs and induces net local disordering effect in LC media." @default.
- W2078714261 created "2016-06-24" @default.
- W2078714261 creator A5002781149 @default.
- W2078714261 creator A5018809170 @default.
- W2078714261 date "2015-02-19" @default.
- W2078714261 modified "2023-10-03" @default.
- W2078714261 title "Calorimetric study of phase transitions in nanocomposites of quantum dots and a liquid crystal" @default.
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- W2078714261 doi "https://doi.org/10.1080/01411594.2014.1001847" @default.
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