LASER INTERACTION STUDIES ON NANO POWDER CALCIUM CARBONATE (CaCO3)

Abstract

The study of Nanoparticles with laser plays an important and major role in the material processing nowadays. In material processing the semiconducting materials with metal oxide have low cost. The effect of He-Ne laser and Diode laser irradiation of Calcium Carbonate (CaCO3) nanoparticles were observed. 0.5 g of CaCO3 nanoparticle powder with different laser exposures has been chosen as samples for investigation. The irradiation timings were 10 minutes and 20 minutes for each laser. Using UV-Vis Spectrometer, absorbance and transmittance has been measured. Also the energy band gap has been calculated. The band gap energy for the sample irradiated with He-Ne laser and Diode laser increases with increase in temperature. The functional groups for various peaks
have been identified and the presence of CaCO3 has been confirmed using FTIR Spectroscopy. Using DLS Spectra the particle size distribution of CaCO3 nanoparticle has been revealed that the size ranges from 2.1nm to 268.9nm. From the Fluorescence Spectroscopy the emission and absorption spectrum of the sample has been recorded at room temperature with an excitation wavelength (λexc) from 569.60 nm to 570.36 nm. The crystalline size ranges 34.37 nm to 35.97 nm and Rhombohedral Structure of the samples has been determined by X-ray diffraction method. The Rhombohedral structure of the CaCO3 nanoparticle has been revealed by SEM analysis also the particle size varies from 106.9nm to 122.9nm (without laser S1), 88.31nm to 101.6nm (He-Ne laser 20mins S3) and 64.66nm to 103.6nm (Diode laser 20mins S5).