Details

Autor(en) / Beteiligte

• Tiwari, Ashish
• Khan, S.A.
• Kher, R.S.
• Dhoble, S.J.
• Mehta, M.

Titel

Thermoluminescence characteristics of inorganically and organically capped ZnS:Cu nanophosphors

Ist Teil von

• Journal of luminescence, 2011-10, Vol.131 (10), p.2202-2206

Ort / Verlag

Amsterdam: Elsevier B.V

Erscheinungsjahr

2011

Quelle

Access via ScienceDirect (Elsevier)

Beschreibungen/Notizen

• ZnS:Cu nanophosphors were prepared by wet chemical methods and characterized by X-ray diffraction (XRD). The typical morphologies of the nanophosphors were investigated by scanning electron microscopy (SEM). The thermoluminescence (TL) properties of inorganically and organically passivated ZnS:Cu nanophosphors were investigated after γ-irradiation using a 60Co source at room temperature. The TL glow curve of capped ZnS:Cu showed variation in TL peak and intensity as the capping agent was changed. Amongst the synthesized samples the TL glow curve of SiO 2 capped ZnS:Cu showed the highest TL intensity. It has been found that TL response of SiO 2 capped ZnS:Cu is linear in the range 10–550 Gy. A discussion of the obtained results is also presented. ► Thermoluminescence (TL) properties of capped ZnS:Cu nanophosphors were investigated. ► Capping can function as an efficient enhancer of luminescence in ZnS nanophosphors. ► Silica capped ZnS:Cu nanophosphors showed well resolved, isolated and high intensity TL peak around 245 °C. ► A linear/sublinear TL response was observed between 10 and 550 Gy.