Thermoluminescence studies of γ-irradiated ZnO:Mg2+ nanoparticles

Pushpa, N.; Kokila, M.K.; Nagabhushana, K.R.

doi:10.1016/j.nimb.2016.04.042

Cited by 10 publications

(3 citation statements)

References 25 publications

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“…previous reports on PL studies of ZnO:Mg 2+ nanoparticles prepared from urea fuel show PL emission peaks at same position as compared with undoped and Co doped ZnO nanoparticles, but PL intensity enhanced after Mg 2+ doping [24]. With the cobalt doping quenching of PL emission is observed.…”

Section: N Pushpa Mk Kokila Journal Of Luminescence 190 (2017) 10mentioning

confidence: 59%

Effect of cobalt doping on structural, thermo and photoluminescent properties of ZnO nanopowders

Pushpa

Kokila

2017

Journal of Luminescence

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A B S T R A C TNanocrystalline cobalt doped zinc oxide nanoparticles are synthesized by solution combustion method using sucrose as a fuel. The synthesized samples are characterized by XRD, SEM, FTIR, Micro-Raman, UV-Visible techniques. XRD studies confirm that both undoped and Co doped samples exhibit hexagonal wurtzite structure with crystallite size~30 nm for undoped Photoluminescence (PL) of all the samples shows violet emission peaks at 361, 398 nm, blue emission peaks at 468,492 nm and weak green emission peaks at 517 and 567 nm. PL intensity is found to decrease with the increase in Co 2+ doping. Thermoluminescence (TL) glow curves of Co doped ZnO nano crystalline phosphors are γ-irradiated in the dose range 0.1-5.0 kGy. Prominent glow peaks at 412 and 575 K are observed for all the exposed doses without changing its glow peak structure. TL intensity increases linearly with γ-dose up to 4 kGy. The Kinetic parameters of TL glow are calculated by deconvolution technique. Activation energy and frequency factor are found to be 1.35 eV and 2.10×10 11 s −1 respectively.

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Section: N Pushpa Mk Kokila Journal Of Luminescence 190 (2017) 10mentioning

confidence: 59%

Effect of cobalt doping on structural, thermo and photoluminescent properties of ZnO nanopowders

Pushpa

Kokila

2017

Journal of Luminescence

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“…The kinetic parameters found as a result of the curve fit method can be used to find the frequency factor (ν) of the trap centers. The frequency factor and other kinetic parameters (β, T m , E t ) are formulated as follows [23,24]:…”

Section: Resultsmentioning

confidence: 99%

Thermoluminescence dose response and kinetic parameters of Gd-doped ZnO nanoparticles

Isik,

Yildirim,

Guner

et al. 2024

Phys. Scr.

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This study investigates the thermoluminescence (TL) properties of undoped and gadolinium (Gd)-doped zinc oxide (ZnO) nanoparticles synthesized via sol-gel method. The crystal structure of both synthesized nanoparticles was determined as hexagonal from x-ray diffraction pattern. The TL curve of undoped ZnO nanoparticles reveals two distinct peaks at 400.5 and 479.2 K, each associated with trap centers featuring activation energies of 0.84 and 1.05 eV. TL curve of the Gd:ZnO introduced three peaks associated with trap centers at 1.10, 1.18, and 1.25 eV. Notably, the absence of the 0.84 eV trap center in Gd-doped ZnO implies a modification in the defect structure. Considering the effect of Gd-doping on the band structure and potential minor errors in the analysis results, it was stated that the traps at 1.05 and 1.10 eV levels belonged to the same defect center. Dose-dependent investigations for undoped and Gd-doped ZnO nanoparticles reveal linear behaviors in the TL response, highlighting their potential for dosimetric applications. Photoluminescence spectra of both compounds exhibited emission peaks around 455 and 577 nm, which were associated with native defect centers.

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“…]81[ﹾ‬ The addition of magnesium enhances the optical and electrochemical properties of zinc oxide nanoparticles [19]. The multifunctional nature of magnesium doped zinc oxide nanoparticles with wide band gap have proved prospective material fora variety of applications such as photo catalysis, antimicrobial and anticancer applications [1,2,[20][21][22][23].The magnesium doped zinc oxide nanoparticles are prepared by different methods, such as co-precipitation method [22,24], auto combustion method [25,26] and green synthesis [17,27].…”

Section: Introductionmentioning

confidence: 99%

Untitled

2022

JOR

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Depending upon their origin and synthesis methods, nanoparticles possess unique physicochemical, structural and morphological characteristics, which are important in a wide variety of applications concomitant to various fields. In the present work, Magnesium doped zinc oxide nanoparticles with different concentrations (5 atomic % and 10 atomic %) are prepared and the prepared samples are annealed at 200 ⸰ C for 2 h in a muffle furnace. The structure, surface morphology, chemical composition, optical properties and photoluminescence properties were analyzed using standard procedures. The antioxidant potential and cytotoxicity against the breast cancer MDAMB231 cancer cell line of prepared nanoparticles were explored. A simple, economical soft chemical method was used. The XRD analysis confirmed the presence of hexagonal wurtzite phase with a space group P63mc all the prepared samples. The estimated average grain size for the sample MZ2 (18.16 nm) was smaller than the other samples. The SEM micrograph showed that the morphology of the samples were exhibited the rod shape (MZ1, MZ2 and MZ4) and flower shape (MZ3). The purity of the samples was confirmed by EDAX data. The estimated band gap energy of sample MZ1 and sample MZ3 were 3.41e V and 3.38 e V from the UV-vis analysis. The FT-IR spectra of the samples predicted the presence of functional groups for Zn-O and Mg-O bonds. The PL analysis displayed a strong UV emission peak at 387 nm and a green emission peak at 557 nm. The results of the prepared samples prove the potential toxicity against MDAMB231 breast cancer cell line.

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Thermoluminescence studies of γ-irradiated ZnO:Mg2+ nanoparticles

Cited by 10 publications

References 25 publications

Effect of cobalt doping on structural, thermo and photoluminescent properties of ZnO nanopowders

Effect of cobalt doping on structural, thermo and photoluminescent properties of ZnO nanopowders

Thermoluminescence dose response and kinetic parameters of Gd-doped ZnO nanoparticles

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