Thermochromism
Videos
Thermochromism is the property of substances to change color due to a change in temperature. A mood ring is an example of this property used in a consumer product, although thermochromism also has mor
Example of a thermochromic T-shirt. A hairdryer was used to change the blue to turquoise.
Another example of a thermochromic T-shirt.
Liquid crystal
Videos
Liquid crystal is a state of matter whose properties are between those of conventional liquids and those of solid crystals. There are many types of LC phases, which can be classified by the molecular
Thermochromism
…wavelengths by the crystallic structure of the material, as it changes between the low-temperature crystallic phase, through anisotropic chiral or twisted nematic phase, to the high-temperature isotropic liquid phase. Only the nematic mesophase has thermochromic properties; this restricts the effective temperature…
Schlieren texture of liquid crystal nematic phase
Otto Lehmann
Alignment in a nematic phase
Phase transition between a nematic (left) and smectic A (right) phases observed between crossed polarizers. The black color corresponds to isotropic medium.