کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1531599 995840 2006 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Structural and electrical studies on tetrameric cobalt phthalocyanine and polyaniline composites
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
Structural and electrical studies on tetrameric cobalt phthalocyanine and polyaniline composites
چکیده انگلیسی

Polyaniline and oligomeric cobalt phthalocyanine are blended in different proportions by chemical methods. These blends are characterised by spectroscopic methods and dielectric measurements. Dielectric studies on the conducting polymer blends are carried out in the frequency range of 100 kHz to 5 MHz from room temperature (300 K) to 373 K. Dielectric permittivity and dielectric loss of these blends are explained on the basis of interfacial polarisation. From the dielectric permittivity studies, ac conductivity of the samples were calculated and the results are correlated. In order to understand the exact conduction mechanism of the samples, dc electrical conductivity of the blends is carried out in the temperature range of 70–300 K. By applying Mott's theory, it is found that the conducting polymer composites obey a 3D variable range hopping mechanism. The values of Mott's temperature (T0), density of states at the Fermi energy (N(EF)), range of hopping (R) and hopping energy (W) for the composites are calculated and presented.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: B - Volume 135, Issue 2, 25 November 2006, Pages 113–119
نویسندگان
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