Details

Autor(en) / Beteiligte

• Maczka, M
• Hermanowicz, K
• Tomaszewski, P E
• Zawadzki, M
• Hanuza, J

Titel

Synthesis and characterization of NaIn(WO4)2:Cr nanoparticles

Ist Teil von

• Solid state sciences, 2008-01, Vol.10 (1), p.61-68

Erscheinungsjahr

2008

Link zum Volltext

Quelle

Elsevier ScienceDirect Journals Complete

Beschreibungen/Notizen

• NaIn(WO4)2:Cr3+ nanoparticles have been prepared by Pechini method. Resultant samples have been characterized by X-ray, transmission electron microscopy, Raman, infrared, absorption and luminescence. The average particle size of NaIn(WO4)2:Cr3+ formed at 460 deg C was about 46nm and increased with the increase of annealing temperature. Vibrational spectra showed significant changes as a function of size which were explained as a result of phonon confinement effect. Luminescence studies revealed that the inter-electronic repulsion in the shell of d orbitals as well as covalent character of the chromium environment remains nearly the same irrespective of the nanocrystallite size. However, the strength of the electron-phonon coupling decreases with decreasing size of nanoparticles.