Effect of rare earth elements on the structural and optical properties of PMMA for possible uses in polymer optical communications

Hamdalla, Taymour A.; Hanafy, T. A.; Seleim, Seleim M.

doi:10.1080/01411594.2019.1597360

Cited by 19 publications

(8 citation statements)

References 34 publications

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“…The site environment of an emitting dopant significantly affects the light–matter interactions of the emitter with metallic surfaces. Much research has gone into reducing these interactions, including using polymer systems as scaffolding for emitting dopants. − For example, Greenspon et al demonstrated the incorporation of an organometallic Eu III complex into ∼17 nm thick PEMUs that showed significant emission intensity even when bound to a plasmonic metal surface . However, the environment and charge density were not controlled to the degree possible, given the current understanding of PEMUs and the variety of polyelectrolytes available.…”

Section: Introductionmentioning

confidence: 99%

Hydrophobic Versus Hydrophilic Polyelectrolyte Multilayers for Emissive Europium Films

Abbett

Tigaa

Sonawane

et al. 2021

ACS Appl. Polym. Mater.

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Films containing lanthanide ions, having exceptionally narrow emissive bandwidths, are often used for high-performance photonic materials. The lanthanide ion is commonly coordinated with organic ligands to enhance emission intensity. However, the light output is influenced by the environment, such as the presence of water, surrounding the ligated metal center. In this work, hydrophobic and hydrophilic ultrathin polyelectrolyte films made using the multilayering technique were compared as hosts for EuIII tris(dipicolinate), [Eu(DPA)3]3–, complexes. The concentration of a complex within the film depended on the number of residual excess positive polyelectrolyte repeat units, which in turn was controlled by the method of multilayer assembly. Because the hydrophobic polyelectrolyte multilayer excluded water more efficiently, the [Eu(DPA)3]3– emission intensity and lifetime decreased only slightly on exposure of the emissive film to ambient humidity and maintained a quantum yield of 48%.

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Section: Introductionmentioning

confidence: 99%

Hydrophobic Versus Hydrophilic Polyelectrolyte Multilayers for Emissive Europium Films

Abbett

Tigaa

Sonawane

et al. 2021

ACS Appl. Polym. Mater.

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“…The motion of free carriers caused by the incident electromagnetic waves is responsible for the optical conductivity (σopt). The values of n and α are determined and presented in the equation below [49], opt= nαC/4 (9) In which C refers to light speed in vacuum. The optical conductivity along with the incident light photon energy of the pure blend and nanocomposites films Figure13.…”

Section: Optical Dielectric Parametersmentioning

confidence: 99%

“…The use of PMMA, polyvinyl alchohol (PVA) and polyethylene oxide (PEO) is common in optical fiber fabrication, particularly in the core [6][7][8]. Better optical and electrical characteristics of polymers as a result of doping them with rare earth elements (REE) especially PMMA have been reported by many studies [9]. In recent times, several research groups are interested in the studying the impact of the addition of REE with nanosized particles as it can result in changing the properties of the polymer [10].…”

Section: Introductionmentioning

confidence: 99%

Structural, Thermal, Optical Characterizations of PANI/PMMA Composite Doped by TiO2 as an Application in Optoelectronic Devices

Alsulami¹,

Rajeh²

2021

Preprint

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The casting method was employed for the preparation of polymer blend films doped with TiO2 (0.5, 1, 1.5, and 2.3 wt.%). The XRD outcomes show that TiO2 phase formation is anatase, with an average crystal size of 20.25 nm. PANI/PMMA-TiO2 nanocomposites samples have an amorphous nature. In addition, the degree of amorphousity is increased with the increase of the content of the TiO2 NPs. The FTIR method was employed for presenting the vibrational bands of the nanocomposites and the intermolecular bonding of the blend with the TiO2 NPs. The applied investigation involved the optical constant like absorption as well as t90-etransmission spectra, refractive index, reflectance, coefficient extinction, dielectric constant’ imaginary and real parts, the susceptibility (χ3) of third order and the optical band gaps. The optical band gap (Eg) values of the films of fabricated nanocomposites was lower upon doping (≤ 1.5 wt.%). The reduction of the value happened due to the introduction of the preselected TiO2 NPs into thin films. Such values significantly match the values which were revealed by the Tauc technique. It was proved through DSC and TGA techniques that TiO2 NPs can lead to the enhancement of the polymer blend in terms of thermal stability. As displayed by the DSC analysis, there is a single Tg of the polymer blend (PANI/PMMA), which prove their miscibility. The optical constants displayed by the experimental results show noticeable changes upon raising the doping concentrations. The resultant doped thin films indicate that the fabricating high-efficient optoelectronic machines are greatly promising.

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“…Rare earth ions have abundant energy levels, which can be used as a medium to realize the transformation of photon frequency and obtain photons of different wavelengths and more uses. So they have a wide range of application value in lighting [1][2][3], laser [4][5][6], communication [7][8][9], biological imaging [10][11][12] and other fields. According to the change of photon frequency, the luminescence of rare earth ions can be divided into down-conversion fluorescence and upconversion fluorescence.…”

Section: Introductionmentioning

confidence: 99%

Study on up-conversion luminescence and energy transfer of Tb3+, Yb3+, Er3+ doped Gd2O2S phosphor

Shao,

Lu,

Bai

et al. 2024

Ninth International Conference on Energy Materials and Electrical Engineering (ICEMEE 2023)

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Gd 2 O 2 S co-doped Tb 3+ , Yb 3+ and Er 3+ phosphors were prepared by coprecipitation method, and their luminescence intensity and fluorescence lifetime were studied. The effects of doping concentration of Tb 3+ ion, (1 mol % -11 mol %) Tb 3+ and Yb 3+ doping ratio (1:1 -1:6) and doping concentration of Er 3+ ion (0.1 mol % -1.1 mol %) on the properties and fluorescence lifetime of synthesized Tb 3+ , Yb 3+ and Er 3+ Gd 2 O 2 S phosphors were investigated. The phase analysis of Gd 2 O 2 S:Tb 3+ , Yb 3+ , Er 3+ phosphors were studied by X-ray powder diffraction (XRD). The fluorescence characteristics of Gd 2 O 2 S:Tb 3+ , Yb 3+ , Er 3+ phosphors were studied in terms. In this work energy transfer mode of Gd 2 O 2 S:Tb 3+ , Yb 3+ , Er 3+ phosphors were studied, which provided a proof for the study of the up-conversion system mechanism.

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Effect of rare earth elements on the structural and optical properties of PMMA for possible uses in polymer optical communications

Cited by 19 publications

References 34 publications

Hydrophobic Versus Hydrophilic Polyelectrolyte Multilayers for Emissive Europium Films

Hydrophobic Versus Hydrophilic Polyelectrolyte Multilayers for Emissive Europium Films

Structural, Thermal, Optical Characterizations of PANI/PMMA Composite Doped by TiO2 as an Application in Optoelectronic Devices

Study on up-conversion luminescence and energy transfer of Tb3+, Yb3+, Er3+ doped Gd2O2S phosphor

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