Dear Dang,
What type of materials have you been prepared, How do you know that your molecules are in hockey stick shape. How do you confirmed that. Is that all the molecules in the compound are same or not? How did you prepared the material.
As I know that, the dielectric constant (loss) is strongly depend on the scale of the particle/grain. Please give me the clear details, also don't hesitate to discusses further.
Dear Dr. Venkata Ramana Mudinepalli
Thank you for answer.
That is available 9c hockey-stick shaped molecules (as attached). I have reviewed many documents related to hockey-stick shaped molecules. The behavior of dielectric loss peaks is shifting towards the left side (low-frequency regime) upon cooling from the isotropic phase to the crystalline phase (due to the increase in cluster size and viscosity with the decrease in temperature? I am not sure). however when I try to measure 9c then the relaxation the frequency increases (instead of decrease) with decreasing temperature (cooling cycle). I don't know why?
Dear Dang Phuc Toan
There are few parameters that determine the dielectric relaxation parameters. For this particular material there may exist some subphases such as cybotactic nematic etc. One can conclude after comparing data of DSC, SAXS and others some conclusion could be drawn.
Phuc Toan Dang
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