Investigation of optical properties of aluminium oxide doped polystyrene polymer nanocomposite films

2018 ◽  
Vol 533 ◽  
pp. 12-16 ◽  
Author(s):  
Shilpa Bhavsar ◽  
Gnansagar B. Patel ◽  
N.L. Singh
Keyword(s):  
Optical Properties ◽  
Aluminium Oxide ◽  
Polymer Nanocomposite ◽  
Nanocomposite Films

Synthesis Structural and Optical Properties of CMC/MgO Nanocomposites

2021 ◽  
Vol 1039 ◽  
pp. 104-114
Author(s):  
Yaqoob M. Jawad ◽  
Mahasin F. Hadi Al-Kadhemy ◽  
Jehan Abdul Sattar Salman
Keyword(s):  
Optical Properties ◽  
Energy Gap ◽  
Experimental Studies ◽  
Polymer Nanocomposite ◽  
Nanocomposite Films ◽  
Structural And Optical Properties ◽  
Covalent Bonds ◽  
Magnesium Oxide Nanoparticles ◽  
Xrd Study ◽  
Method Of Solution

Nanocomposites were prepared by the method of solution casting with different proportions of magnesium oxide nanoparticles (0, 1, 3, 5, 7 and 9) wt%. The structural and optical properties of nanocomposites of CMC/MgO have been studied. It was well known that the increased content of MgONPs in the method contributes to the peaks of MgONPs being completely integrated and/or disappearing within the CMC diffraction halos in the experimental results of XRD study. The differences in the XRD spectrum indicate that doping with nanoparticles induced a disparity in the microstructure of the polymer. Nanocomposite film scanning electron microscopy (SEM) reveals that MgONPs appear to form aggregates and scatter well in (CMC/MgO) nanocomposite films and at apply 9 wt. It forms a continuous network within the polymer for the percentage of MgONPs to (CMC) polymer. FTIR spectrum revealed the MgONPs has no destructive influence on the polymer structure as no covalent bonds formed between CMC and MgONPs. The optical properties of CMC/MgO nanocomposites were measured in wavelength range (200–900) nm. Experimental studies have shown that the absorbance, absorption coefficient, extinction coefficient, refractive index, actual and imaginary dielectric constant of CMC polymer is improved with an increase in concentrations of MgONPs in nanocomposites. The transmittance and energy gap of CMC polymer are decreased with the increase in the concentrations of MgONPs.

Optical properties of undoped, Eu3+ doped and Li+ co-doped Y2Hf2O7 nanoparticles and polymer nanocomposite films

2020 ◽  
Vol 7 (2) ◽  
pp. 505-518 ◽  
Author(s):  
Santosh K. Gupta ◽  
Jose P. Zuniga ◽  
Maya Abdou ◽  
P. S. Ghosh ◽  
Yuanbing Mao
Keyword(s):  
Optical Properties ◽  
Quantum Yield ◽  
Polymer Nanocomposite ◽  
Nanocomposite Films ◽  
Asymmetry Ratio ◽  
Covalent Character ◽  
Co Doping ◽  
Concentration Asymmetry ◽  
Co Doped

Li+ co-doping of Y2Hf2O7:Eu3+ nanoparticles improve their quenching concentration, asymmetry ratio, quantum yield, and radioluminescence intensity due to the enhanced covalent character of Eu3+–O2− bonding.

Effect of gamma radiation on the structural, thermal and optical properties of PMMA/Sn0.75Fe0.25S2 nanocomposite

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Ali A. Alhazime ◽  
Nesreen T. El-Shamy ◽  
Kaoutar Benthami ◽  
Mai ME. Barakat ◽  
Samir A. Nouh
Keyword(s):  
Thermal Stability ◽  
Optical Properties ◽  
Gamma Irradiation ◽  
Optical Band Gap ◽  
Color Variation ◽  
Nanocomposite Films ◽  
Color Changes ◽  
Gamma Irradiated ◽  
Intermolecular Crosslinking ◽  
Amorphous Part

AbstractNanocomposite films of polymethylmethacrylate PMMA with Sn0.75Fe0.25S2 nanoparticles (NPs) were fabricated by both thermolysis and casting techniques. Changes in PMMA/Sn0.75Fe0.25S2 nanocomposite (NCP) due to gamma irradiation have been measured. XRD results indicate that the gamma doses of 10–80 kGy cause intermolecular crosslinking that reduces the ordered portion in the NPs. Bonding between the NPs and the host PMMA was confirmed by FTIR. TGA results indicate an enhancement in thermal stability in the NCP films irradiated with doses 20–80 kGy. The optical band gap was reduced from 3.23 to 2.47 eV upon gamma irradiation up to 80 kGy due bonding between the NPs and PMMA which enhanced the amorphous part of the NPs. Finally, the color variation between the blank and irradiated films (ΔE) was determined. Color changes immensely when the PMMA/Sn0.75Fe0.25S2 NCP films are gamma irradiated. Values of ΔE were as much as 31.6 which is an acceptable match in commercial reproduction on printing presses.

Optical properties of diamond like carbon and diamond like nanocomposite films

2009 ◽  
Vol 6 (12) ◽  
pp. 2817-2819
Author(s):  
Asta TamulevicÌŒienė ◽  
SÌŒaruÌ„nas MesÌŒkinis ◽  
Vitoldas Kopustinskas ◽  
Sigitas TamulevicÌŒius
Keyword(s):  
Optical Properties ◽  
Nanocomposite Films ◽  
Diamond Like Carbon

Interfacial reflection enhanced optical extinction and thermal dynamics in polymer nanocomposite films

2016 ◽  
Author(s):  
Jeremy R. Dunklin ◽  
Gregory T. Forcherio ◽  
Keith R. Berry ◽  
D. Keith Roper
Keyword(s):  
Polymer Nanocomposite ◽  
Nanocomposite Films ◽  
Thermal Dynamics ◽  
Optical Extinction

Enhancement of optical properties of poly (9,9′-di-n-octylfluorenyl-2,7-diyl) in conjugated polymer/TiO2 nanocomposites

2014 ◽  
Vol 92 (9) ◽  
pp. 1021-1025 ◽  
Author(s):  
Bandar Ali Al-Asbahi ◽  
Mohammad Hafizuddin Haji Jumali
Keyword(s):  
Optical Properties ◽  
Conjugated Polymer ◽  
Emission Spectra ◽  
Treatment Temperature ◽  
Nanocomposite Films ◽  
Glass Substrates ◽  
Solution Blending ◽  
Heat Treated ◽  
Blending Method ◽  
Splitting Energy

The influence of colloidal TiO2 nanoparticle contents on the optical properties of poly (9,9′-di-n-octylfluorenyl-2,7-diyl) conjugated polymer (PFO) has been investigated. The solution blending method was used to prepare homogenous PFO/TiO2 nanocomposite. The nanocomposite films were prepared on glass substrates using the spin-coating technique. The films were divided into two groups, the first was left to dry at room temperature while the second was heat-treated at 120 °C for 1 h. Absorption and emission spectra showed that the PFO existed in α- and β-phases morphology having monomeric, excimeric, and double excimeric states. In addition, both spectra revealed that TiO2 contents and heat treatment temperature extended the conjugation length of PFO. Finally, emission spectra for both cases exhibited decreasing in the line width of zero-phonon emission spectra and increasing in the vibronic splitting energy, upon increment of the TiO2, led to a significant increase in π-electron delocalization and lower degree in chain disorder.

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