Polymeric matrices doped

There are several approaches to the preparation of multicomponent materials, and the method utilized depends largely on the nature of the conductor used. In the case of polyacetylene blends, in situ polymerization of acetylene into a polymeric matrix has been a successful technique. A film of the matrix polymer is initially swelled in a solution of a typical Ziegler-Natta type initiator and, after washing, the impregnated swollen matrix is exposed to acetylene gas. Polymerization occurs as acetylene diffuses into the membrane. The composite material is then oxidatively doped to form a conductor. Low density polyethylene (136,137) and polybutadiene (138) have both been used in this manner. 

For PPV doped with AsFg anion, a new high BE Cls component appeared at about 286.5 eV, in addition to the two Cls components at 284.6 eV and 285.5 eV for pristine PPV [60], It has been associated with carbon atoms in a highly oxidized state resulting from doping. Thus, the Cls core-level spectrum of doped PPV readily indicates that the positive charge is non-uniformly distributed over the polymeric matrix. Furthermore, the satellite structures of the doped polymer are found to have a substantially enhanced intensity at about 290 eV, which is... 

Solid-state dye laser A dye laser that uses a gain medium in the sohd state. This medium can be a dye-doped polymeric matrix or dye molecules in a crystalline conftg-uraAom... 

We found that there exists photo-induced anisotropy in fulgide-doped polymeric films M, which can be used in polarization holography application. When the colored states are irradiated by a linearly polarized 650 nm laser, the films returns to the bleached states and photo-induced anisotropy is produced during this process. The mechanism of photo-induced anisotropy in the fulgide films is the following HI anisotropic absorbing molecules of fulgide are immobilized randomly in the PMMA polymeric matrix, which shows... 

Similar analyses of several SAXS curves for different Fe (11) doping levels, up to 4.5 wt%, indicated that the average distance between siliceous clusters decreases for increasing Fe(II) doping (Silva, 2003). These results suggested that the Fe(ll) ions are dispersed in the polymeric matrix and that they induce a retraction effect that leads to the observed decrease in the average inter-cluster distance. 

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