Molecularly doped polymer, requirements

The field of organic conductors has been extensively reviewed (B-77MI1300, 78ANY25, B-78MI11300, 78MI11302, 79ACR79) and no attempt is made here to describe the synthesis and properties of known materials. Molecular conductors of the doped polymer type have been excluded since these are neither intrinsic conductors nor heterocyclic. A review of the principal requirements for the molecular and crystal structures as currently understood is presented as an introduction to the field of organic conductors. 

The preparation of continuous transition alumina fibers requires the use of liquid precursors with a higher viscosity, e.g. 30- 100 Pa.s. The control of the viscosity of the spinning dope is achieved through (1) the use of high molecular weight polymers and (2) proper vaporization of the solvent in a vacuum [37]. After heat treatment, the fibers are composed of one or several transition aluminas, depending on the sintering temperature. 

Whenever the commercially available particles do not match the operator s requirements, a variety of possibilities exist in order to modify the particles from company suppliers. Similarly to other doped beads the dyes [92] or quantum dots [107, 108] can be physically entrapped into magnetic beads by swelling or are covalently bound to the surface of the particles. If localization of the dye on the particle surface is desired or if the polarity of dye and/or matrix polymer does not allow the irreversible entrapment of the dye in the bulk polymer, a covalent attachment of the dye is preferable [109, 110]. Even the covalent binding of whole fluorescent nanoparticles to magnetic microparticles is possible, as shown by Kinosita and co-workers who investigated the rotation of molecular motors [111]. 

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