18 Questions
How do smectic liquid crystals differ from nematic liquid crystals?
Molecules arranged in layers
What is the defining characteristic of nematic liquid crystals?
Threadlike structure
What term is used to describe the property of liquid crystals where their properties depend on the direction they are measured?
Anisotropic
In what way do cholesteric liquid crystals differ from other types of liquid crystals?
Helical twist structure
Which of the following best describes the molecular arrangement in the mesophase state?
Long range order like crystalline solids
What characteristic of supercritical fluids allows them to effuse through solids like a gas and dissolve materials like a liquid?
High diffusivity
'Most liquid crystal compounds exhibit polymorphism.' What does this mean in the context of liquid crystals?
They exist in multiple crystal forms
In what way do liquid crystals in emulsions contribute to enhanced physical stability?
By being highly viscous
Which type of liquid crystalline phase has structures believed to be similar to those in cell membranes?
Smectic liquid crystals
What is a defining characteristic of a supercritical fluid according to the text?
Distinct vapor or liquid state
How do small changes in pressure or temperature affect supercritical fluids close to the critical point?
Large changes in density and solubility
Which liquid crystalline phase is characterized by structures that resemble those found in cell membranes?
Smectic liquid crystals
What is the unique characteristic of cholesteric liquid crystals?
Aligned at a slight angle to one another
How are thermotropic liquid crystals typically formed?
By heating solids
What role can the smectic mesophase play in solubilization?
Enhance the dissolution of water-soluble materials
Which condition can be caused by the build-up of lipids in liquid crystalline state on blood vessel walls?
Atherosclerosis
What is the structure of chiral nematic crystals like?
Stack of thin, two-dimensional nematic-like layers
How do lyotropic liquid crystals typically form?
By addition of a solvent to a solid
Learn about the state of matter that exists between solid crystalline state and liquid state. Discover the properties of liquid crystals which combine characteristics of both solids and liquids.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
