Unveiling the Versatile Realm of CdSnO3 Nanoparticles for Advanced Sensing Applications

This study presents the synthesis and characterization of thin-film CdSnO3 nanoparticles at different deposition temperatures of 400, 500, and 600°C. The prepared samples were characterized by X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), energy-dispersive X-ray (EDX) spectroscopy, transmission electron microscopy (TEM) and optical and ammonia gas sensing properties, respectively. XRD confirms the orthorhombic crystal structure, with prominent peaks corresponding to the (111), (112), (103), (130), and (133) planes. The mean crystallite size is determined to be 84 nm. SEM reveals morphological changes with varying substrate temperatures. EDX spectroscopy shows elemental composition variations, highlighting non-stoichiometric CdSnO3. TEM images depict larger spherical nanoparticles with clear lattice fringes. FTIR spectra confirm the presence of Cd-O and Sn-O bonds. Optical properties yield a calculated band gap was decreased with increase in temperature. Gas sensing tests demonstrate significant sensitivity to ammonia gas concentrations, with responses affected by ammonia concentrations. Overall, CdSnO3 nanoparticles show promise for applications in diverse fields due to their tunable properties and potential for tailored performance.