Effect of CuO addition on the optical and electrical properties of sodium zinc borophosphate glasses

Chanshetti, Umakant B.; Sudarsan, V.; Jogad, M. S.; Chondhekar, T. K.

doi:10.1016/j.physb.2011.04.063

Cited by 31 publications

(6 citation statements)

References 9 publications

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“…The creation of non-bridging oxygen NBOs can be correlated with the decrease in the N4 ratio with increasing in ZnO nanoparticles content in addition to other parameters. The negative charge on NBOs makes it easier for electrons to be excited at higher wavelengths 57 . Both ZnO and CaO act to reduce the BO 4 /(BO 4 :BO 3 ) ratio and enhanced the glass network by increasing the number of non-bridging oxygen atoms 58 .…”

Section: Resultsmentioning

confidence: 99%

Structural, optical, and cytotoxicity studies of laser irradiated ZnO doped borate bioactive glasses

Ghazy

Elmowafy

Abdelghany

et al. 2023

Sci Rep

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Borate glasses (BG) doped with different amounts of ZnO (0–0.6 mol%) were formed by the traditional melt quenching technique. The different glasses so made were characterized using different characterization techniques such as X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscope (SEM), and UV–Vis absorption optical properties. The XRD patterns showed an amorphous structure with one broad peak at 2θ = 29°, while the phonons bands were studied in terms of the FTIR bands. Optical properties of the glasses were studied using UV–Vis absorption spectra in the range 190–1100 nm, in which the prominent band lies at about 261.5 nm of peak position, from which the bandgab (Eg) was calculated from its edge using Tauc’s plot, with Eg ~ 3.5 eV. The laser irradiation showed no significant changes in the absorption bands, despite a significant change observed in the amorphous behavior in the XRD pattern. The cell viability was performed for two samples of the BG and 0.6 mol% ZnO doped using 3-(4,5-dimethyl-2-thiazolyl)-2,5-diphenyl-2H-tetrazolium bromide (MTT) assay method. The result showed better cell viability and low toxicity. So, ZnO doped BG can be used in various biomedical applications.

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Section: Resultsmentioning

confidence: 99%

Structural, optical, and cytotoxicity studies of laser irradiated ZnO doped borate bioactive glasses

Ghazy

Elmowafy

Abdelghany

et al. 2023

Sci Rep

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“…The complex dielectric function was obtained by: where ε' is a real part and ε'' is an imaginary part or dielectric loss, i = √−1, and ν is the frequency. The complex conductivity σ* = σ' + iσ" and electric modulus M* = M' + iM" are determined and interpreted according to their relationships, as detailed in 23,24 . The frequency dependence of the three parameters (ε′, M″, and σ′) at room temperature will be considered here.…”

Section: Characterization Of the Prepared Nano-ferritesmentioning

confidence: 99%

Development of high performance microwave absorption modified epoxy coatings based on nano-ferrites

Abd El-Gawad,

Eldesouki,

Abd El-Ghany

2024

Sci Rep

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With the rapid spread of wireless technologies and increasing electromagnetic energy, electromagnetic waves (EMW) have become a severe threat to human health. Therefore, minimizing the harmful effects of electromagnetic wave radiation is possible through the development of high-efficiency EMW absorption coatings. The aim of this work was to generate microwave absorbance coatings containing synthesized nano-CuFe2O4 and nano-CaFe2O4. Firstly, nano-CuFe2O4 and nano-CaFe2O4 were synthesized using the sol–gel method. Then, their structure, electrical, dielectric, and magnetic properties were investigated to find out the possibility of using these materials in high-frequency applications (e.g., microwave absorbance coatings). After that, two dosages (2.5 wt% and 5 wt%) of nano-CuFe2O4 and nano-CaFe2O4 were incorporated into epoxy resin to prepare modified epoxy resin as microwave coatings. The dielectric studies show that the AC conductivity of the prepared samples is high at high frequencies. Additionally, the magnetic properties reveal a low coercivity value, making these samples suitable for high-frequency devices. The microwave results illustrate that adding nano-ferrites with high content enhances the absorption characteristics of the tested films. The results showed that the two films have two absorption bands with RL < –10 dB ranging from 10.61 to 10.97 GHz and from 10.25 to 11.2 GHz. The minimum return loss achieved for the two cases is −13 and −16 dB, respectively. Indicating that the film coated with CuFe has a better absorption value than the one coated with CaFe.

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“…Higher-wavelength electron excitation is facilitated by the negative charge on NBOs [52]. By increasing the quantity of NBO atoms, ZnO improved the glass network and decreased the BO4/(BO4+BO3) ratio [53]. ZnO operates as an intermediate oxide in the glass structure, either as a modi er or a maker network [54].…”

Section: Fourier Transform Infrared (Ftir)mentioning

confidence: 99%

Improving the physical and optical characteristics of Zinc doped borate glass for bone replacement

Salatein,

Abdelghany,

Fahim

et al. 2023

Preprint

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The presented study explores the potential of zinc-doped modified borate glass as a biomaterial for bone bonding applications. The glass samples were prepared using a melt quenching technique with a definite composition of (45-x) B2O3–24.5Na2O–24.5CaO–6P2O5–xZnO, where x = 1, 2, 5, 7.5, and 10 (wt %) and soaked in simulated body fluid (SBF) for extended periods to explore their suitability for bone bonding applications. The samples were analyzed for their structural, optical, and bioactive properties. XRD and FTIR analysis were used to examine the structural properties of the samples before and after immersion in SBF. The XRD analysis revealed that increasing the Zn content and immersion time led to the formation of a hydroxyapatite (HA) layer inside the glassy matrix, indicating improved bioactivity. The FTIR analysis showed that the addition of ZnO allowed for the conversion of tetrahedral borate units to corresponding triangular units, which improved bioactivity. Electronic spectrum measurements (UV/Vis) were used to assess the samples' optical characteristics, showing that increasing Zn content decreases the optical energy gap, indicating improved optical properties. In conclusion, this study highlights the potential of zinc-doped borate glass as a promising biomaterial for bone replacement applications. The findings indicate that by varying the Zn content, it is possible to improve the physical and optical characteristics of the glass, making it a more viable option for bone replacement. Further research is needed to optimize the composition and properties of zinc-doped borate glass and to assess its long-term performance in vivo.

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Effect of CuO addition on the optical and electrical properties of sodium zinc borophosphate glasses

Cited by 31 publications

References 9 publications

Structural, optical, and cytotoxicity studies of laser irradiated ZnO doped borate bioactive glasses

Structural, optical, and cytotoxicity studies of laser irradiated ZnO doped borate bioactive glasses

Development of high performance microwave absorption modified epoxy coatings based on nano-ferrites

Improving the physical and optical characteristics of Zinc doped borate glass for bone replacement

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