Photoluminescence features of AgBr nanoparticles formed in porous glass matrices

• Autorzy: Doycho I. K. , Gevelyuk S. A. , Ptashchenko O. O. , Rysiakiewicz-Pasek E. , Tolmachova T. M. , Tyurin O. V. , Zhukov S. O.
• Języki publikacji: EN

Abstrakty

EN

The photoluminescence of AgBr nanoparticles formed by a two stage liquid-gas microsynthesis technology in two types of porous glass with different sizes of pores was investigated. Polyvinyl alcohol (Polinol) was used as a binder. It has been found that AgBr nanoparticles in the glasses with smaller pores luminesce more intensively, and we attribute this phenomenon to the differ-ences in pore size distributions. The luminescence spectra were shown to have two maxima corresponding to AgBr nanoparticles formed within the nanopores of two different sizes characteristic of each of the matrices. In both cases, the spectra excited by xenon lamp irradiation are more intensive than those stimulated by a 337-nm nitrogen laser. Comparing the maxima shifts in the phosphorescence excitation spectra with ones in phosphorescence spectra we can conclude that the luminescence and phosphorescence centers in AgBr nanoparticles are of identical nature in the matrices of both types. The investigation results fit neatly into the inherently consistent quantum confinement model and are well correlated with the poroscopic spectra of both types of glass.

Słowa kluczowe

EN

porous glasses; silver bromide; nanoparticles; luminescence properties; quantum confinement

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Optica Applicata
• Rocznik: 2010
• Tom: Vol. 40, nr 2
• Strony: 323--332
• Opis fizyczny: Bibliogr. 19 poz.

Twórcy

autor

Doycho I. K.

autor

Gevelyuk S. A.

autor

Ptashchenko O. O.

autor

Rysiakiewicz-Pasek E.

autor

Tolmachova T. M.

autor

Tyurin O. V.

autor

Zhukov S. O.

• Non-Crystalline Media Department (NDL-11) of I.I. Mechnikov Odessa National University, Dvorianska St. 2, 65-082 Odessa, Ukraine

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