الفهرس 
MicrocIusters
Polaron and bipolaronOnly 14 pages are availabe for public view
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Abstract
The present work deals with the investigation of the effect of various filling levels (FLs) of FeCl3, AgNO3, and mixtures of two transition compounds (X)AgNO3 (10X)M, where M = FeCl3 and MnCl2 , on the structure and physical properties of polystyrene (PS) films. The samples were prepared by casting method, where W = 0.0, 0.1, 0.5, 1.0, 2.5, 5.0, 7.5, 9.0, 9.5, 9.9 and 10.0 % and W is replaced by X for mixed systems. The prepared films were studied by Xray diffraction (XRD), infrared (IR), dc electrical resistivity (<U+F072>), dc magnetic susceptibility (<U+F063>) and electron spin resonance (ESR). The XRD revealed two main characteristic peaks, the amorphous and the polymerization peaks. For the mixed systems an unexpected appearance of crystalline peaks is noticed. The assignment of these peaks is based on the formation of clusters. The main PS characterizing peaks are depicted from IR spectra. The dc electrical conduction studies were discussed on the basis of the model of Kuivalaninen. The dc magnetic susceptibility studies indicate that <U+F063> obeys CurieWeiss law. At intermediate FLs of FeCl3 the ESR spectral line possesses unresolved five lines due to fine structure indicating the presence of isolated Fe+3, while at higher FLs the spectra indicate the presence of aggregated Fe+3. For AgNO3 filler the spectra display weak and very narrow signal. For AgNO3 and FeCl3the spectra have main signal at the higher part of the magnetic field and deformed signal at the lower part due to the octahedral distribution of Fe+3 ions in PS matrix. For AgNO3 and MnCl2 The spectra depict an ideal Lorentizian signal at low values of X indicating the presence of aggregated Mn+2. At higher values of X, the unresolved six lines due to hyperfine structure became clearer indicating the presence of isolated Mn+2 and the absence of aggregated Mn+2.