an array of closely spaced molecular orbitals occupying a discrete range of energy
a solid with a very high electrical conductivity
a solid with limited electrical conductivity
a solid with extremely low electrical conductivity
the energy gap between an occupied valence band and a vacant band called the conduction band
a band of closely spaced molecular orbitals that is essentially fully occupied by electrons
a band of molecular orbitals lying higher in energy
incorporation of a hetero atom into a solid to change its electrical properties.
a solid inorganic material, either crystalline or amorphous.
the "frictionless" flow of elections that occurs when a substance loses all resistance to the flow of electrical current
superconducting transition temperature
the temperature below which a substance exhibits superconductivity
a complex metal oxide that undergoes a transition to a superconducting state at a low temperature
the "frictionless" flow of electrical current at temperatures above 30 K in certain complex metal oxides
a large molecule of high molecular mass, formed by the joining together of large number of molecules of low molecular mass
molecules with low molecular weights
a material that can be formed into particular shapes by application of heat and pressure
a polymeric material that can be readily reshaped by the application of heat and pressure
a plastic, that once formed in a particular mold, is not readily reshaped by heat and pressure
a material that can undergo a substantial change in shape via stretching, bending, or compression and return to its original shape upon release of the distorting force
the coupling of monomers with one another, with no other products formed in the reaction
molecules are joined together through condensation reactions
a complex polymer resulting from the polymerization of two or more chemically different monomers
a measure of the extent of crystalline character (order) in a polymer
the formation of bonds between polymer chains
the process of cross-linking polymer chains in rubber
a process in which extremely small particles of uniform size are produced in a series of chemical steps, followed by controlled heating
any material that has a biomedical application
any substance that can be compatibly placed within living systems
an electrical device that forms the heart of an integrated circuit
a substance that exhibits one or more partially ordered liquid phases above the melting point of the solid form.
nematic crystalline phase
a liquid crystal in which the molecules are aligned in the same general direction, along their axes, but in which the ends of the molecules are not aligned.
smectic liquid crystalline phase
a liquid crystal in which the molecules are aligned along their axes and arranged in sheets, with the ends of the molecule aligned.
cholesteric liquid crystalline phase
a liquid crystal formed from flat, disc-shaped molecules that align through the stacking of the molecular discs
a material whose useful characteristics are the result of feature in the range from 1 to 100 nm.