Porosity structure in photon active glasses

• Autorzy: Jasińska B. , Śniegocka M. , Reisfeld R. , Zigansky E.
• Konferencja: Proceedings of the 40th Polish Seminar on Positron Annihilation PSPA'2012, 13-14 June 2012, Kazimierz Dolny, Poland
• Języki publikacji: EN

Abstrakty

EN

Two kinds of photon active glasses were investigated using positron annihilation lifetime spectroscopy (PALS). Both kinds of glasses were prepared using a sol-gel technique, doped by complex of ruthenium tris bipyridyl chloride. Glasses differed from the initial matrix: the first one was prepared using silicon oxide while the second one - zircon oxide. The ortho-positronium (o-Ps) lifetime and intensities were determined from lifetime spectra. Different porosity structure concluded from PALS measurements was found in both cases. In the silica based glasses small free volumes (angstrom size) and pores (from 1 to 10 nm) existed in the material. On the contrary, in zirconia based glasses small intermolecular voids were produced in the structure only, independently of the way of material preparation.

Słowa kluczowe

EN

glass; ortho-positronium (o-Ps); porosity; positron annihilation lifetime spectroscopy (PALS); sol-gel technique

• Wydawca: Institute of Nuclear Chemistry and Technology
• Czasopismo: Nukleonika
• Rocznik: 2013
• Tom: Vol. 58, No. 1
• Strony: 241--244
• Opis fizyczny: Bibliogr. 10 poz., rys.

Twórcy

autor

Jasińska B.

autor

Śniegocka M.

autor

Reisfeld R.

autor

Zigansky E.

• Institute of Physics, Maria Curie-Skłodowska University, 1 M. Curie-Skłodowskiej Sq., 20-031 Lublin, Poland, Tel.: [phone], Fax: [phone],

Bibliografia

• 1. Ciesielski K, Dawidowicz AL, Goworek T, Jasińska B, Wawryszczuk J (1998) Positronium lifetimes in porous Vycor glass. Chem Phys Lett 289:41–45
• 2. Consolati G (2001) An experimental investigation of the occupied volume in polymers. Mater Sci Forum 363/365:244–247
• 3. Eldrup M, Lightbody D, Sherwood JN (1981) The temperature dependence of positron lifetimes in solid pivalic acid. J Chem Phys 63:51–58
• 4. Goworek T, Ciesielski K, Jasińska B, Wawryszczuk J (1997) Positronium in large voids. Silica gel. Chem Phys Lett 272:91–95
• 5. Jasińska B, Zaleski R, Śniegocka M, Reisfeld R, Zigansky E (2007) Testing ETE model, temperature dependences of PALS data. Phys Status Solidi C 4;10:3985–3988
• 6. Kansy J (1996) Microcomputer program for analysis of positron lifetime spectra. Nucl Instrum Methods A 374:235–244
• 7. Reisfeld R (2001) Prospects of sol-gel technology towards luminescent materials. Opt Mater 16;1/2:1–7
• 8. Reisfeld R, Zigansky E, Jasinska B, Wodnicka K (2005) Porosity of sol-gel silica glasses doped by ruthenium bipyridyl as measured by positron annihilation lifetime spectroscopy and nitrogen adsorption. Opt Appl 35;4:677–689
• 9. Tao SJ (1972) Positronium annihilation in molecular substances. J Chem Phys 56:5499–5501
• 10. Yariv E, Reisfeld R, Saraidarov Ts, Axelrod E, Rysiakiewicz-Pasek E, Wodnicka K (2002) Optimization of tunable laser glasses with the aid of dielectric relaxation and adsorption measurements. J Non-Cryst Solids 305:354–361