TY - JOUR ID - 152981 TI - The structural and optical behavior of Ag+ and Gd3+ ions in CdWO4 JO - Nanochemistry Research JA - NCR LA - en SN - 2538-4279 AU - Heydarian Dehkordi, Nooshin AU - Raeisi, Morteza AU - Alamdari, Sanaz AD - Department of Nanotechnology, Faculty of New Science and Technologies, Semnan University, Semnan, Iran AD - Department of Physics, Faculty of Science, Shahrekord University, Shahrekord, Iran AD - Faculty of Physics, Semnan University, Semnan, Iran Y1 - 2022 PY - 2022 VL - 7 IS - 1 SP - 53 EP - 61 KW - Ag and Gd-doped CWO KW - morphology KW - Optical properties KW - size KW - Cross-relaxation DO - 10.22036/ncr.2022.01.008 N2 - In this research, Cadmium tungstate (CdWO4 or CWO), CWO: Gd, CWO: Ag, Ag and Gd-doped CWO (co-doped CWO) nanopowders were synthesized by using a simple chemical method. In addition, their microstructure and optical properties were characterized by applying different techniques. For example, XRD patterns revealed the purity of the synthetic nanopowders, and XPS results showed the Cd, W, O, Ag, and Gd characteristic peaks in the nanopowders. Further, the SEM and TEM images indicated that the size of the nanoparticles is distributed over the range of 24 to 63 nm. The shape and size of the nanoparticles in co-doped CWO were nanorod and reduced by half. Furthermore, UV-Vis spectra indicated that their bandgap energies vary from 5.3 to 5.55 eV. The PL and IBIL spectra exhibited light emission in the blue-green range at 468 and 495nm, respectively, at room temperature. The excited electrons in the 1T1u level of the WO66- complex were trapped in the 6IJ level of Gd3+ by cross-relaxation. The plasmonic effect of Ag+ ions and fluorescence resonance energy transfer (FRET) to the energy level of 3T1u increased the total intensity in the PL and IBIL spectra. Synthesized nanopowders are proper alternatives to fluorescent single crystals and produce nanocomposite flexible scintillators for ionizing radiation detection. UR - http://www.nanochemres.org/article_152981.html L1 - http://www.nanochemres.org/article_152981_bd2ec4569a47c12d60f8c311eab5a810.pdf ER -