2003
DOI: 10.1016/s0169-4332(03)00590-7
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Magnetic and conducting particles: preparation of polypyrrole layer on Fe3O4 nanospheres

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Cited by 142 publications
(46 citation statements)
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“…The peaks at 1731, 1632, and 1402 cm -1 could be assigned to the stretching vibration in carboxyl groups and C=O, C=C, and C-O bonds. The bands at 1537 and 1452 cm -1 in PPy and MP spectra are due to the typical pyrrole ring vibration of pure PPy and bands of =C-H in plane vibration at 1298, 1089, and 1032 cm -1 [19]. The peaks at 3434 and 1631 cm -1 correspond to N-H and C=C stretching vibrations, respectively.…”
Section: Resultsmentioning
confidence: 92%
“…The peaks at 1731, 1632, and 1402 cm -1 could be assigned to the stretching vibration in carboxyl groups and C=O, C=C, and C-O bonds. The bands at 1537 and 1452 cm -1 in PPy and MP spectra are due to the typical pyrrole ring vibration of pure PPy and bands of =C-H in plane vibration at 1298, 1089, and 1032 cm -1 [19]. The peaks at 3434 and 1631 cm -1 correspond to N-H and C=C stretching vibrations, respectively.…”
Section: Resultsmentioning
confidence: 92%
“…The peak at 1181 cm -1 is attributed to C-H or C-N in-plane vibration [61]. The bands at 912 and 771 cm -1 were attributed to the =C-H in-plane vibration and out-of-plane vibration, respectively [62]. The strong absorption bands at 1086 cm -1 indicate that poly(PPA) film is highly doped with the anion of ClO 4 - [63].…”
Section: Interfacial Properties Ofmentioning
confidence: 96%
“…Para incorporação de 25% o compósito passa apresentar maiores valores quanto as magnetizações e campo coercivo; M s =8,40 emu/g; M r =1,06 emu/g, além dos mesmos vaores de campo coercivo H c =0,084 KOe (Figura 11b), isto muito provavelmente devido a dependência do tamanho da partícula [38] . Observa-se que tanto para o compósito desdopado como redopado, há um aumento nos valores de magnetização em função do aumento do campo magnético externo aplicado, havendo poucas perdas de energia, evidenciados pela o estreitamento na curva de histerese ao longo do eixo central, além de apresentar de baixos campos coercivos [39][40][41][42][43][44] , valores que facilitam a orientação dos domínios magnéticos das partículas e por sua vez da magnetização da amostra.…”
Section: Observaunclassified