Crystalline and absorption studies on PMMA/CdS composite using XRD &amp; UV-Vis techniques

Patel, Arunendra Kumar; Jain, Nidhi; Patel, Pooja; Das, K.; Bajpai, R.

doi:10.1063/1.5028827

Cited by 5 publications

(6 citation statements)

References 5 publications

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“…As presented in this table, E U is in reverse proportion to E g and it increases with BCB doping level. This is because E U increases with increment in the disorder/amorphicity found in polymeric systems 39 which agrees with our XRD results. Besides, BCB loading led to state redistribution from band to tail and allows the number of band‐to‐tail and tail‐to‐tail transitions to be increased.…”

Section: Resultssupporting

confidence: 91%

“…As is clear, χ C of PMMA was 32.0%, which is close to the value reported by Ramrakhiani et al 38 . (33.5%) and smaller than the 39.74% reported by Patel et al 39 . As presented, the value of χ C decreases with BCB doping until it reaches 11.9% for 2 wt% BCB doped PMMA film.…”

Section: Resultssupporting

confidence: 81%

“…The values of χ C are listed in Table 1. As is clear, χ C of PMMA was 32.0%, which is close to the value reported by Ramrakhiani et al 38 (33.5%) and smaller than the 39.74% reported by Patel et al 39 As presented, the value of χ C decreases with BCB doping until it www.soci.org S El-Gamal, AM Ismail wileyonlinelibrary.com/journal/pi reaches 11.9% for 2 wt% BCB doped PMMA film. This is due to (i) the BCB dye molecules could prevent the crystallization of PMMA, (ii) the complex structure of the dye could increase the disorder of the PMMA chains and (iii) the pendent side groups were present.…”

Section: Xrd Studysupporting

confidence: 77%

“…In polymeric systems, the absorption coefficient ( α ) near the absorption band edge usually shows an exponential dependence on the photon energy ( hv ) which follows Urbach's formula 39

α ((), hv) = α_{0} ((), \frac{italichv}{E_{U}})

where α 0 is a constant and E U is the Urbach energy or Urbach tail, which is the width of the localized states in the optical bandgap. Figure 9 shows the relation between ln(α) and hv for pure PMMA and dye doped films.…”

Section: Resultsmentioning

confidence: 99%

“…In polymeric systems, the absorption coefficient (⊍) near the absorption band edge usually shows an exponential dependence on the photon energy (hv) which follows Urbach's formula 39 ⊍ hv…”

Section: Urbach's Energy (E U )mentioning

confidence: 99%

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Electrical and optical properties of novel brilliant cresyl blue dye‐doped poly(methyl methacrylate) as selective cut‐off laser filters

El‐Gamal

Ismail

2020

Polymer International

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Dye doped polymer films of poly(methyl methacrylate) (PMMA) and brilliant cresyl blue (BCB) dye were synthesized using the solution casting technique. This work aims to investigate the influence of BCB dye doping on the structural, optical, dielectric and mechanical properties of PMMA. XRD reveals an increase in PMMA amorphicity with BCB loading. This suggests the solubility of BCB dye within PMMA. Fourier transform IR confirms the interaction between BCB dye and PMMA. The transmittance T of PMMA decreases with BCB doping and the cutoff transmission occurs in the ranges 200-366 nm and 560-660 nm for 2 wt% BCB doped film. The absorbance of PMMA deceases with ⊗ and loading BCB creates many absorption edges. The optical bandgaps of dye doped films are lower than that of PMMA. Urbach's energy increases from 0.52 to 0.86 eV on BCB doping. The dielectric constant ε 0 , dielectric loss ε 00 and AC conductivity ⊞ ac at room temperature as a function of frequency f, 100 Hz to1.0 MHz, and the doping level were studied. Loading dye increases ⊞ ac to higher values. The optical limiting results indicate that the dye doped films are highly attenuated for a laser beam of 638.2 nm. The dye incorporation enhances the mechanical performance of PMMA. It increases Young's modulus, tensile strength and elongation at break, which boosts the use of 1 wt% BCB doped film as a flexible laser attenuator. The excellent characteristics of novel BCB dye doped PMMA films present them as cutoff laser filters, laser attenuators, optoelectronic devices or in the semiconductor industry.

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Section: Resultssupporting

confidence: 91%

Section: Resultssupporting

confidence: 81%

Section: Xrd Studysupporting

confidence: 77%

“…In polymeric systems, the absorption coefficient ( α ) near the absorption band edge usually shows an exponential dependence on the photon energy ( hv ) which follows Urbach's formula 39

α ((), hv) = α_{0} ((), \frac{italichv}{E_{U}})

Section: Resultsmentioning

confidence: 99%

Section: Urbach's Energy (E U )mentioning

confidence: 99%

See 3 more Smart Citations

Electrical and optical properties of novel brilliant cresyl blue dye‐doped poly(methyl methacrylate) as selective cut‐off laser filters

El‐Gamal

Ismail

2020

Polymer International

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Enhancing the microstructural, optical, and tensile properties of the PVC‐PMMA blend film: The role of PbO nanoparticles incorporation

El‐Gamal

Khaled

Mohammed

2023

J of Applied Polymer Sci

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PVC‐PMMA and PVC‐PMMA‐PbO PNC films were prepared. HR‐TEM confirmed the nanoparticle structure of PbO, while XRD assured its purity, tetragonal structure, with crystallites measuring 35.71 nm. SEM showed the blend surface appeared smooth and homogenous with a fingerprint shape, and loading increased the surface roughness. PbO was reported to be evenly distributed across the blend surface. FTIR confirmed that all blend functional groups are present and the formation of hydrogen bonds between PVC and PMMA, besides the strong interactions between PbO and blend chains. Different optical constants were investigated using UV–vis‐IR spectroscopy. The transmittance of the blend was 81.99% and decreased to 48.14% after loading 4 wt.% PbO (at 500 nm). Loading causes an increase in absorption. The extinction coefficient shows low extinction coefficients (k < 10−6). Loading PbO narrowed the blend band gaps and increased the refractive index n. The carrier's concentration to the electron effective mass was reported. Optical conductivity, energy loss functions, and nonlinear optical parameters were also studied. Tensile properties revealed that loading increased Young's modulus, tensile strength, and elongation at break. The enhancements in optical and mechanical characteristics of PNC films illustrate the possibility of extending their applications to include the semiconductor, electronics, and optics industries.

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Dielectric Properties of PMMA/PPy Composite Materials

Barnoss

Aribou

Nioua

et al. 2020

NATO Science for Peace and Security Series B: Physics and Biophysics

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Crystalline and absorption studies on PMMA/CdS composite using XRD & UV-Vis techniques

Cited by 5 publications

References 5 publications

Electrical and optical properties of novel brilliant cresyl blue dye‐doped poly(methyl methacrylate) as selective cut‐off laser filters

Electrical and optical properties of novel brilliant cresyl blue dye‐doped poly(methyl methacrylate) as selective cut‐off laser filters

Enhancing the microstructural, optical, and tensile properties of the PVC‐PMMA blend film: The role of PbO nanoparticles incorporation

Dielectric Properties of PMMA/PPy Composite Materials

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