کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1891227 1533521 2014 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Gamma irradiation effect on the structural, morphology and electrical properties of ZnO–CuO doped PVA nanocomposite thin films for Escherichia coli sensor
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم تشعشع
پیش نمایش صفحه اول مقاله
Gamma irradiation effect on the structural, morphology and electrical properties of ZnO–CuO doped PVA nanocomposite thin films for Escherichia coli sensor
چکیده انگلیسی


• ZnO–CuO doped PVA were exposed to γ-radiation source ranging from 0 to 30 kGy.
• The X-ray diffraction (XRD) patterns reveal good crystalline quality.
• The surface roughness of the thin films became smoother as the γ-radiation increase.
• The energy gap, Eg increases from 2.70 to 3.80 eV as the γ-radiation increased.
• The sensitivity of the sensors has been observed to be higher at higher γ-radiation.

Gamma irradiation effect on fabricated ZnO–CuO doped PVA nanocomposite thin films for determination of Escherichia coli has been investigated. Thin films of ZnO–CuO doped PVA were exposed to 60Co γ-radiation source at difference dose rate, ranging from 0 to 30 kGy at room temperature. The structural, morphological and electrical properties of the sample were investigated using X-ray diffraction (XRD), Atomic force microscopy (AFM), UV–visible spectroscopy and Current–voltage (I–V) measurement. The X-ray diffraction (XRD) spectra have been performed to observe the formation of crystal phases of all pure ZnO–CuO thin films. The diffraction patterns reveal good crystalline quality. The surface roughness of the thin films which can be determined by conductive Atomic force microscopy (AFM) measurement became smoother as the gamma radiation increased. The optical absorption property has been determined by UV–visible Spectroscopy in the wavelength range of 300–800 nm which indicate the energy gap, Eg increases from 2.70 to 3.80 eV as the γ-radiation increased. The presence of E. coli as a bacterial contamination in water was identified by measuring the changes of conductivity of thin films using current–voltage (I–V) measurement. The sensitivity of the sensors has been observed to be higher at a higher radiation dose.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Radiation Physics and Chemistry - Volume 103, October 2014, Pages 108–113
نویسندگان
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