Full metadata record
DC FieldValueLanguage
dc.contributor.authorBasha, Sk. Johny-
dc.contributor.authorKhidhirbrahmendra, V.-
dc.contributor.authorMadhavi, J.-
dc.contributor.authorThampy, U.S. Udayachandran-
dc.contributor.authorReddy, Ch. Venkata-
dc.contributor.authorRavikumar, R.V.S.S.N.-
dc.date.accessioned2019-10-23T07:55:37Z-
dc.date.available2019-10-23T07:55:37Z-
dc.date.issued2019-
dc.identifier.citationBasha, S. J., et al. (2019). Structural, optical, magnetic and thermal investigations on Cr3þ ions doped ZnS nanocrystals by co-precipitation method. Journal of Science: Advanced Materials and Devices 4 (2019) 260-266vi
dc.identifier.issn2468-2179-
dc.identifier.urihttp://repository.vnu.edu.vn/handle/VNU_123/67926-
dc.description.abstractCr3þ ions doped ZnS nanocrystals were synthesized using the co-precipitation method. The as-prepared sample was characterized to investigate the magnetic and thermal properties along with its structural and spectral studies. X-ray diffraction (XRD) analysis confirms the cubic zinc blend structure, and the mean crystallite size is evaluated to be 4.7 nm. Scanning electron microscope (SEM) and transmission electron microscopy (TEM) images indicate stone-like structures. The deposition of Cr3þ ions in ZnS nanocrystals is evidenced by energy dispersive spectroscopy (EDS) analysis. From the optical absorption data, the bands in the UV-VIS region are recognized as the characteristic bands of Cr3þ ions. Crystal field and Racah parameters are calculated as Dq ¼ 1564, B ¼ 567 and C ¼ 3389 cm 1. The electron paramagnetic resonance (EPR) spectrum exhibits well resolved paramagnetic resonance signal at g ¼ 1.982 which arises from the exchange interaction between Cr3þ ions. It reveals from the correlating optical and EPR results that the Cr3þ ions occupy distorted octahedral site symmetry in the host lattice. Photoluminescence spectrum shows three distinct emission bands in blue, green and orange regions. Commission International de I'Eclairage (CIE) chromaticity coordinates are found in the blue region at (x, y) ¼ (0.172, 0.121). In addition, the prepared nanocrystals exhibit a ferromagnetic behavior with a coercive field (Hc) of 513 Oe. The thermal steadiness of the prepared samples was characterized by Thermal gravimetric e Differential thermal analysis (TG-DTA). These Cr3þ ions doped ZnS nanocrystals find potential applications in LEDs, spintronics and nanoscale quantum devicesvi
dc.language.isoenvi
dc.publisherElseviervi
dc.relation.ispartofseriesJournal of Science: Advanced Materials and Devices;-
dc.subjectNanocrystalsvi
dc.subjectCo-precipitationvi
dc.subjectChromium ionsvi
dc.subjectPowder XRDvi
dc.subjectSpectroscopic studiesvi
dc.subjectPhotoluminescencevi
dc.titleStructural, optical, magnetic and thermal investigations on Cr3þ ions doped ZnS nanocrystals by co-precipitation methodvi
dc.typeArticlevi
dc.identifier.doihttps://doi.org/10.1016/j.jsamd.2019.03.002-
Appears in Collections:Advanced Materials and Devices


  • Structural, optical, magnetic and thermal investigations ...
    • Size : 1,39 MB

    • Format : Adobe PDF

    • View : 
    • Download : 
  • Full metadata record
    DC FieldValueLanguage
    dc.contributor.authorBasha, Sk. Johny-
    dc.contributor.authorKhidhirbrahmendra, V.-
    dc.contributor.authorMadhavi, J.-
    dc.contributor.authorThampy, U.S. Udayachandran-
    dc.contributor.authorReddy, Ch. Venkata-
    dc.contributor.authorRavikumar, R.V.S.S.N.-
    dc.date.accessioned2019-10-23T07:55:37Z-
    dc.date.available2019-10-23T07:55:37Z-
    dc.date.issued2019-
    dc.identifier.citationBasha, S. J., et al. (2019). Structural, optical, magnetic and thermal investigations on Cr3þ ions doped ZnS nanocrystals by co-precipitation method. Journal of Science: Advanced Materials and Devices 4 (2019) 260-266vi
    dc.identifier.issn2468-2179-
    dc.identifier.urihttp://repository.vnu.edu.vn/handle/VNU_123/67926-
    dc.description.abstractCr3þ ions doped ZnS nanocrystals were synthesized using the co-precipitation method. The as-prepared sample was characterized to investigate the magnetic and thermal properties along with its structural and spectral studies. X-ray diffraction (XRD) analysis confirms the cubic zinc blend structure, and the mean crystallite size is evaluated to be 4.7 nm. Scanning electron microscope (SEM) and transmission electron microscopy (TEM) images indicate stone-like structures. The deposition of Cr3þ ions in ZnS nanocrystals is evidenced by energy dispersive spectroscopy (EDS) analysis. From the optical absorption data, the bands in the UV-VIS region are recognized as the characteristic bands of Cr3þ ions. Crystal field and Racah parameters are calculated as Dq ¼ 1564, B ¼ 567 and C ¼ 3389 cm 1. The electron paramagnetic resonance (EPR) spectrum exhibits well resolved paramagnetic resonance signal at g ¼ 1.982 which arises from the exchange interaction between Cr3þ ions. It reveals from the correlating optical and EPR results that the Cr3þ ions occupy distorted octahedral site symmetry in the host lattice. Photoluminescence spectrum shows three distinct emission bands in blue, green and orange regions. Commission International de I'Eclairage (CIE) chromaticity coordinates are found in the blue region at (x, y) ¼ (0.172, 0.121). In addition, the prepared nanocrystals exhibit a ferromagnetic behavior with a coercive field (Hc) of 513 Oe. The thermal steadiness of the prepared samples was characterized by Thermal gravimetric e Differential thermal analysis (TG-DTA). These Cr3þ ions doped ZnS nanocrystals find potential applications in LEDs, spintronics and nanoscale quantum devicesvi
    dc.language.isoenvi
    dc.publisherElseviervi
    dc.relation.ispartofseriesJournal of Science: Advanced Materials and Devices;-
    dc.subjectNanocrystalsvi
    dc.subjectCo-precipitationvi
    dc.subjectChromium ionsvi
    dc.subjectPowder XRDvi
    dc.subjectSpectroscopic studiesvi
    dc.subjectPhotoluminescencevi
    dc.titleStructural, optical, magnetic and thermal investigations on Cr3þ ions doped ZnS nanocrystals by co-precipitation methodvi
    dc.typeArticlevi
    dc.identifier.doihttps://doi.org/10.1016/j.jsamd.2019.03.002-
    Appears in Collections:Advanced Materials and Devices


  • Structural, optical, magnetic and thermal investigations ...
    • Size : 1,39 MB

    • Format : Adobe PDF

    • View : 
    • Download :