Abstract
Investigation of the red luminescence in NaEu(WO4)2 nanoparticles synthesized using water and ethylene glycol and its biocompatibility on HeLa cells, E. coli, S. aureus, C. albicans has been evaluated for the first time. The Scheelite like pure tetragonal NaEu(WO4)2 nanoparticles have been synthesized by a simple solvothermal method by using water (NaEuW I) and ethylene glycol (NaEuW II) as reaction medium. Detailed particle size and crystal structural analysis of both the samples is carried out using HRTEM and Synchrotron powder diffraction. Enhanced red fluorescence was observed on increase in calcination temperature in both the samples signifying their greater stability and increased crystallinity on thermal treatment. The blue shift of charge transfer (CT) band in NaEuW II nanoparticles is explained by the nature of the Eu-O bond lengths obtained by Rietveld refinement using Synchrotron diffraction data. Chromaticity diagram revealed the possibility of tuning the red emission of as prepared and anneal...
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