In this paper, some electrical properties of (polyethylene glycol [PEG]) which is dissolved in distal water after and before irradiation by (γ‐ray) (60Co) with dose of (8000 rad) and average radiation (320 rad min−1) for (25 min) have been studied. The study of electrical properties has included two lines; first the measurement of capacity, electrical conductivity of (PEG), and second the calculation of dielectric constant and molar conductivity. It has been founded that the capacitance, electrical dielectric constants, and conductivity are increased after irradiation and increased with increasing of concentration and also after irradiation but the molar conductivity is decreased with increasing of the concentration. The temperature is constant approximate to room temperature (25°C) in all calculated measurements. The cross linking of polymer chains is the main cause of the change in values of properties that may be resulted and then increased in the average viscosity molecular weight for material (PEG) used in research.

Nanoparticles of gold that for years have been recognized are the concept of an increasingly rising reports number and of promising for electronic, optical, magnetic, biomedical and catalytic applications in century of 21st. Because of Nanoparticles of gold stability, an interest in such research is a reason for performing the current work. There are various types of AuNPs: Zero-dimensional AuNps: quantum dots, spherical nanoparticles. AuNPs as 1-dimensional: nanowires, nano-rods, nano-belts, nanotubes. AuNPs as 2-dimensional: nano-plates of gold, nano-shell and, AuNPs as 3 dimensional: nano tadpoles of gold, nano- dumbbells of gold (AuNDs), AuNPs being spread, for example, nano-dendrites of gold, nano-pods, and nano-stars. Au NPs, in the field of medicine are investigated for several applications include vectors of drug delivery, agents of contrast, and therapy of localized heat, biomarkers of ultra-sensitive and more. AuNPs are very attractive material for biosensor, chemosensory, genosensor and immunosensor production