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Nuclear Radiation Nanosensors and Nanosensory Systems pp 53–59Cite as

Luminescence Efficiency of Cadmium Selenide/Zinc Sulfide (CdSe/ZnS) Quantum Dot Nanoparticle Sensors Under X-Ray Excitation

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Abstract

This paper presents the luminescence efficiency (LE) of toluene dissolved Cadmium Selenide/Zinc Sulfide (CdSe/ZnS) quantum dot (QD) samples after their irradiation with X-rays and UV. The LE was investigated as a function of the weight over volume (w/v) QD concentration under variable fluxes of X-rays and wavelengths of UV radiation. All the samples were handled through cubic 12.5 × 12.5 × 45 mm3 quartz cuvettes. For the X-ray experiments, the QD samples were irradiated by a ΒΜΙ General Medical Merate tube in the peak voltage range between 50 and 130 kVp. The tube was of rotating Tungsten anode type with inherent filtration equivalent to 2 mm Al. The w/v concentration varied between 7.1 × 10−5 mg/mL to 49.7 × 10−5 mg/mL. The UV induced LE was of symmetrical distribution versus UV wavelength, with maximum at the 590 nm. The X-ray induced LE, increased with w/v QD sample concentration, saturating however, in the w/v range between 21.3 × 10−5 mg/mL and 28.4 × 10−5 mg/mL. The maximum LE was observed for the 21.3 × 10−5 mg/mL QD sample after the irradiation of 90 kVp X-rays. The distinction of the LE values in the highly concentrated samples was vague. In the peak voltage range between 120 and 130 kVp, all QD concentration levels exhibited comparable X-ray induced LE values. The LE properties of the studied QD samples could be promising as X-ray radiation sensors.

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Authors and Affiliations

  1. Department of Electronic Computer Systems Engineering, Piraeus University of Applied Sciences, Petrou Ralli & Thivon 250, GR-122 44, Aigaleo, Greece

    D. Nikolopoulos & Panayotis H. Yannakopoulos

  2. Department of Biomedical Engineering, Technological Educational Institute of Athens, Radiation Physics, Materials Technology and Biomedical Imaging Laboratory, GR-12210, Egaleo, Greece

    I. Valais, C. Michail & I. Kandarakis

  3. Department of Medical Laboratories, Technological Educational Institute of Athens, Egaleo, Greece

    C. Fountzoula

  4. Department of Medical Radiologic Technology, Technological Educational Institute of Athens, 122 10, Athens, Greece

    A. Bakas

  5. Department of Medical Physics, University of Patras, School of Medicine, GR- 15310, Rion, Greece

    G. Panayiotakis

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  1. D. Nikolopoulos
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  2. I. Valais
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  3. Panayotis H. Yannakopoulos
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  4. C. Michail
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  5. C. Fountzoula
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  7. I. Kandarakis
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Correspondence to D. Nikolopoulos .

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Editors and Affiliations

  1. Georgian Technical University, Tbilisi, Georgia

    Paata J. Kervalishvili

  2. Computer Systems Engineering, Piraeus University of Applied Sciences, Aigaleo, Greece

    Panayotis H. Yannakopoulos

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Nikolopoulos, D. et al. (2016). Luminescence Efficiency of Cadmium Selenide/Zinc Sulfide (CdSe/ZnS) Quantum Dot Nanoparticle Sensors Under X-Ray Excitation. In: Kervalishvili, P., Yannakopoulos, P. (eds) Nuclear Radiation Nanosensors and Nanosensory Systems. NATO Science for Peace and Security Series B: Physics and Biophysics. Springer, Dordrecht. https://doi.org/10.1007/978-94-017-7468-0_5

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