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Tailoring the optical properties of PVA / PVP blend by doping with Cu / MnS nanoparticles
Author(s) -
Heiba Zein K.,
Mohamed Mohamed Bakr,
Ahmed Sameh I.,
Alhazime Ali A.
Publication year - 2021
Publication title -
journal of vinyl and additive technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.295
H-Index - 35
eISSN - 1548-0585
pISSN - 1083-5601
DOI - 10.1002/vnl.21815
Subject(s) - materials science , doping , crystallite , fourier transform infrared spectroscopy , scanning electron microscope , nanoparticle , chemical engineering , band gap , nanotechnology , composite material , optoelectronics , engineering , metallurgy
PVA/PVP blend embedded with different ratios of nano Cu 0.9 Mn 0.1 S (Cu/MnS) was prepared with thermolysis and casting techniques. X‐ray diffraction analysis showed the formation of nano Cu/MnS as a single hexagonal phase with an average crystallite size 11 nm. Scanning electron microscope (SEM) revealed nearly homogenous particles morphology. Fourier transform infrared (FTIR) spectroscopy technique was applied to characterize the Cu/MnS doped PVA/PVP matrix. UV measurements were utilized to investigate the optical properties in detail. Upon doping with Cu/MnS, the bandgap of PVA/PVP was significantly decreasing with the amount of doping; which enabling tailoring the band gap depending on the doping content. The analysis showed that the main possible transitions in pure PVA/PVP blend are indirect allowed and direct forbidden. On the other hand, for the doped blend samples, the direct allowed is the main possible transition. Moreover, the refractive index and the real and imaginary parts of the dielectric constant increased upon increasing the Cu/MnS amount doped.