Structural, morphological and spectroscopic characterization of chemically
synthesized SnO₂ nanoparticles for electronic device applications

Pankaj Kumar Kushwaha, Neelabh Srivastava, Ajai Kumar Gupta, Sunil Kumar Srivastava
Department of Physics,
School of Physical Sciences, Mahatma Gandhi Central University, Motihari-845 401, India

SnO₂ nanoparticles are of great importance in magnetic storage devices, optoelectronic devices, catalytic and sensing applications, etc. The structure and morphology of the nanoparticles play important role in variety of cutting-edge applications. SnO₂ nanoparticles have been synthesized using co-precipitation method and characterized using X-ray diffraction (XRD), Scanning Electron Microscopy (SEM), Thermo-gravimetric Analysis (TGA), UV-vis absorption spectroscopy and Raman spectroscopy. XRD data along with Rietveld refinement analysis has confirmed the formation of single-phase SnO₂ nanoparticles having tetragonal rutile phase. The optical band gap of the synthesized nanoparticles has been found to be ~ 3.62 eV which is considerably blue shifted as compared to its bulk value. The local ordering and the size of nanoparticles greatly influence the vibrational properties, and therefore, the Raman spectroscopic characterization was made in low-frequency region to investigate the disorder and grain size distribution. The vibrational Raman peaks of SnO₂ nanoparticle at 475, 631 and 776 cm^–1 suggest the presence of oxygen vacancies and defects/disorders in the synthesized material.© Anita Publications. All rights reserved.
Keywords: SnO₂ nanoparticles, Co-precipitation, XRD, SEM, UV-Vis, and Raman spectroscopy.

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