Effects of X-ray irradiation on the structural and optical properties of microcrystalline Alq3 powder and its potential dosimetry application

Abdullahi, Shittu; Aydarous, Abdulkadir; Salah, Numan

doi:10.1016/j.radphyschem.2021.109656

Cited by 20 publications

(6 citation statements)

References 42 publications

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“…[12] Several authors have performed studies on the use of polymeric NCP films in dosimeter applications through studying their modification in optical properties. [13][14][15][16] They accredited the modification in color in irradiated PC to the rearranged isopropylidene radicals, strong conjugated bonds, and production of active free radicals and benzophenones. [17] In the current study, CdSe NPs have been selected owing to their direct intrinsic E g that allows them to be an essential substance in several applications.…”

Section: Introductionmentioning

confidence: 99%

Gamma induced changes in Makrofol/CdSe nanocomposite films

et al. 2022

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In our present work, we applied ex-situ casting procedure to prepare a nanocomposite (NCP) from Makrofol polycarbonate (PC) and CdSe nanoparticles. The CdSe nanoparticles were prepared by thermolysis procedure in the presence of N2 gas flow. Rietveld refinement of x-ray data illustrated that the CdSe accustoms cubic zinc blend structure of a 6.057 Å lattice parameter and 2 nm typical grain size. Samples from the prepared NCP were exposed to γ dosages (20-250 kGy). The modifications induced in the NCP films owing to γ dosages have been studied. The γ irradiation (50-250 kGy) causes the crosslinks that reduces the optical bandgap from 4.15 to 3.81 eV; associated with an increase in dielectric parameters and refractive index. This is attributed to the increase of the mass fraction of the disordered regions as specified by XRD. The PC-CdSe NCP was found to have reaction to color modification which makes it suitable in saleable reproduction on printing press.

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Section: Introductionmentioning

confidence: 99%

Gamma induced changes in Makrofol/CdSe nanocomposite films

et al. 2022

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“…This is important information for their use in marketable applications and dosimetry [17]. Several researches have investigated the importance of color change property of the exposed polymers in dosimetry [18][19][20]. They investigated that the technique of color changes initiates the foundations which consider the construction of radiation sensors.…”

Section: Introductionmentioning

confidence: 99%

Effect of GaAs pulsed laser on the structure and optical characterization of Makrofol VLG 7-1

Bahareth

2022

Arab Journal of Nuclear Sciences and Applications

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Samples ofMakrofol films were exposed to different laser fluences (2-18 J/cm 2 ). X-ray diffraction (XRD) and ultraviolet spectroscopy (UVs) techniques were used to explore the resultant effect of laser radiation on the structure and optical characteristics of the Makrofol polymer. The change of refractive index (n) and the optical band gap (Eg) with the laser fluence was interpreted. A reduction in the Eg values (3.08-2.54 electron volt) was observed when raising the laser fluence up to 18 J/cm 2 . This was accompanied by an increase in refractive index from 2.376 to 2.533. This was attributed to the prevalence of crosslinking that damaged the crystalline portion in the Makrofol polymer. The crosslinking created color centers that induced differences in color between the exposed films and the uncolored pristine Makrofol film. The color difference was significant as the values of E were greater than 5. This optimized the Makrofol polymer to be used in dosimetric applications.

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“…This is critical information for them to be used in industry [12], as it is applicable to marketable applications such as radiation dosimetry and processing [13]. Several researchers have investigated the structural and optical changes in irradiated polymers for dosimeter purposes [14][15][16]. The ensuing free radicals, benzophenones, re-arranged isopropylidene radicals, and creation of stronger conjugated bonds are responsible for the change in optical characteristics of Makrofol caused by irradiation [17].…”

Section: Introductionmentioning

confidence: 99%

Effect of Plasma Exposure on the Structural and Optical Properties of Makrofol VLG 7-1 Nuclear Track Detector

SK¹

2022

J Miner Sci Materials

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Makrofol VLG 7-1 is a sort of Makrofol (bisphenol-A polycarbonate) nuclear track detector. We believe that the current study is the first one that deals with the effect of plasma irradiation on Makrofol VLG 7-1. Samples of Makrofol films were treated with various plasma exposure times (300-1800 sec.) The resultant outcome of the plasma irradiation on the structure and optical characteristics of the Makrofol samples were explored applying X-Ray Diffraction (XRD) and Ultraviolet Spectroscopy (UVs). The optical band gap, refractive index, and optical dielectric parameters were characterized and interpreted based on the exposure time. The optical bandgap decreased with increasing the exposure time up to 1800 sec. We attribute this to the dominance of crosslinking that damaged the crystalline portion.

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Effects of X-ray irradiation on the structural and optical properties of microcrystalline Alq3 powder and its potential dosimetry application

Cited by 20 publications

References 42 publications

Gamma induced changes in Makrofol/CdSe nanocomposite films

Gamma induced changes in Makrofol/CdSe nanocomposite films

Effect of GaAs pulsed laser on the structure and optical characterization of Makrofol VLG 7-1

Effect of Plasma Exposure on the Structural and Optical Properties of Makrofol VLG 7-1 Nuclear Track Detector

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