What are thermochromic liquid crystals made of?
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| These facts lead to the quasi-binary picture of thermotropic liquid crystals. | |
21 Citations | It may be brought about by the variation of temperature yielding thermotropic liquid crystals or by the variation of amount and properties of the solvent giving rise to the lyotropic ones. |
61 Citations | To the best of our knowledge, this is the first case in thermotropic liquid crystals where one compound exhibits both calamitic and discotic mesomorphism with the change of molecular shape in anisotropy. |
| Their appearance and behaviour suggest several properties of liquid crystals which have not previously been reported. | |
15 Citations | These results indicate a fundamental physicochemical difference between the intermolecular interactions that prevail in thermotropic and lyotropic liquid crystals. |
| Above this temperature, the crystals seem to have a heat capacity similar to that of the liquid. | |
33 Citations | Thus, this paper provides a family of new thermochromic materials for potential thermometric applications. |
5 Citations | We emphasize that the modulation occurs over a wide temperature range outside the active temperature of the thermochromic liquid-crystal indicator. |
| We show that liquid crystals can provide a pathway through several fields of physics such as thermodynamics, optics and electromagnetism. |
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How do thermochromic materials change color with temperature changes, and what mechanisms are responsible for this phenomenon?5 answersThermochromic materials exhibit color changes in response to temperature variations. These changes are attributed to structural phase transitions within the materials. The transition between crystal and amorphous states, induced by heating and sometimes light exposure, causes the color alteration. In the case of Ni-dithiolene dianion salt, the phase transition at around 340/320 K leads to rapid thermochromism from green to red. Additionally, the alteration in π-orbital overlap between anions and cations within a mixed stack contributes to properties like irreversible mechanochromism and intense near-IR absorbance. The reversible thermochromic films, made using thermochromic microcapsules and polylactic acid, change color gradually within a specific temperature range, showcasing the potential for temperature sensing applications.
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What is the hot material for thermoelectric research?5 answersThe hot material for thermoelectric research is ZnSb. ZnSb has shown promising features, including a relatively high charge carrier mobility and Seebeck coefficient, as well as a low thermal conductivity that can be further reduced through nanostructuring. Researchers have dedicated efforts to studying and improving the properties of ZnSb, and it has been reported to have a figure of merit above one. However, there are still features and behaviors of ZnSb that are not well-understood, such as the behavior and properties of its intrinsic defects. Overall, ZnSb holds potential for improving the thermoelectric properties and has garnered significant research interest in recent years.
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How are liquid crystals manufactured?8 answers