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Browsing by Subject "Luminescence"

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Colour tuning from violet to blue emission stimulated by various nickel oxide nanostructures: Influence of bias voltage towards volatile organic compounds vapours

Author: Mokoena, Teboho P ; Swart, HC ; Hillie, Kenneth T ; Motaung, DE Date: Mar 2021 Propanol and benzene, toluene, ethylenebenzene and xylene (BTEX) vapours are within the volatile organic compounds (VOCs) family and are utilized in industrial and petroleum goods, are greatly toxic in human health and environment. Therefore, ... Read more
Fabrication of a propanol gas sensor using p-type nickel oxide nanostructures: The effect of ramping rate towards luminescence and gas sensing characteristics

Author: Mokoena, Teboho P ; Hillie, Kenneth T ; Swart, HC ; Leshabane, N ; Tshilongo, J ; Motaung, DE Date: Oct 2020 We report on the effect of the annealing temperature ramping rate on the gas sensing performance towards n-propanol gas and the luminescence properties using p-type NiO gas sensors prepared by the hydrothermal method and annealed at various ... Read more
The influence of Pr3+ co-doping on the photoluminescence and cathodoluminescence properties of SiO2:Eu3+/Tb3+

Author: Mhlongo, Gugu H ; Dhlamini, MS ; Ntwaeaborwa, OM ; Swart, HC ; Hillie, KT Date: Jul 2011 Tb3+-Pr3+, and Eu3+-Pr3+ ion pairs co-doped in a SiO2 matrix were prepared by a sol-gel method. Co-doping of Eu3+ and Tb3+ ions with Pr3+ in SiO2 resulted in the quenching of Eu3+ and Tb3+ emissions with increasing Pr3+ concentrations. The ... Read more
Label-free detection of HIV-1 infected cells via integration of optical tweezers and photoluminescence spectroscopy

Author: Lugongolo, Masixole Y ; Ombinda-Lemboumba, Saturnin ; Noto, LN ; Maaza, M ; Mthunzi-Kufa, Patience Date: Feb 2018 The human immunodeficiency virus-1 (HIV-1) is currently detected using conventional qualitative and quantitative tests to determine the presence or absence of HIV in blood samples. However, the approach of these tests detects the presence of ... Read more
Luminescent properties and quenching effects of Pr3+ co-doping in SiO2:Tb3+/Eu3+ nanophosphors

Author: Mhlongo, Gugu H ; Dhlamini, MS ; Ntwaeaborwa, OM ; Swart, HC ; Hillie, KT Date: Feb 2014 Luminescence properties of Pr(sup3+) single doped SiO2 and Pr(sup3+) co-doped SiO(sub2):Tb(sup3+)/Eu(sup3+) nanophosphors synthesized using sol–gel method were investigated. X-ray diffraction (XRD), and scanning electron microscope (SEM) were ... Read more
Synthesis and photoluminescence properties of CaSixOy:Tb3+ phosphors prepared using solution-combustion method

Author: Dejene, FB ; Kebede, Mesfin A Date: Jul 2011 Effect of Tb3+ ion concentrations on the structural and persistence luminescence properties of CaSixOy:Tb3+ crystals were evaluated using powders grown by the solution combustion technique. The XRD study indicates the change of phase from ... Read more

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Browsing by Subject "Luminescence"

Browsing by Subject "Luminescence"

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