TY - JOUR T1 - Investigation of the optical properties of the graphene-Ag/Poly(vinyl chloride) nanocomposite thin film in the UV-Visible wavelength region TT - بررسی خواص اپتیکی فیلم‌ نازک نانوکامپوزیت گرافن – نقره / پلی وینیل کلراید در ناحیه‌ی طول موج فرابنفش-مرئی JF - opsi JO - opsi VL - 20 IS - 0 UR - http://opsi.ir/article-1-96-en.html Y1 - 2014 SP - 1529 EP - 1532 KW - Keywords: Optical band gap KW - Graphene sheets KW - Refractive index KW - Silver nanoparticles. N2 - Abstract- In this paper, the graphene-Ag/Poly(vinyl chloride) nanocomposite has been prepared by a solution method. Then, the optical constants such as absorption coefficient, extinction coefficient, refractive index, optical band gap (Eg), optical conductivity and dielectric constant were calculated by considering the results of reflectance and transmittance spectra in the UV-Visible wavelength region. The optical band gap of the pure polymer was obtained about 3.79 eV. Finally, it was observed that, adding filler nanoparticles to the polymer matrix reduces the optical band gap of the polymer about 20%. M3 ER -