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Sujita Karki,Pabitra Aryal,하대훈,김홍주,박향규,Indra Raj Pandey 한국물리학회 2019 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.75 No.7
Nano powders of CaMoO$_4$ were synthesized by using the precipitation method, and the obtained powders were dried inside a vacuum oven at 120 $^\circ$C. The phases of powders were analyzed by using X-ray diffraction (XRD), which revealed that CaMoO$_4$ was free from any extra phases. The surface morphologies of the powders were studied by using transmission electron microscopy (TEM), and the average particle sizes were quite small, being in the range of 7 nm. The optical properties were characterized by using ultraviolet-visible (UV-vis) absorption spectroscopy and the optical energy band gap was found to be 5.51 eV. The fluorescence decay time and the luminescence spectrum of the sample were measured under the excitation by Laser (266 nm), X-ray and proton sources. The obtained results were compared with the CaMoO$_4$ bulk crystal and sintered powder obtained from the solid state reaction.