title: Spectroscopic studies and antibacterial activities of pure and various levels of Cu-doped BaSO₄ nanoparticles.
abstract: The present study was made to design the pure and various levels of Cu doped (0.025 M, 0.05 M and 0.075 M) BaSO4 NPs synthesized by chemical precipitation method. The synthesized products have been characterised by X-ray Diffractometer (XRD), Fourier transform infrared (FT-IR) spectrometer, thermogravimetric and differential thermal analysis (TG-DTA), UV-Vis-diffused reflectance spectroscopy (UV-Vis-DRS), field emission-scanning electron microscopy with energy dispersive spectroscopy (FE-SEM with EDS), transmission electron microscopy (TEM) and application oriented study like antibacterial activity also reported. The result determined from XRD was affirmed by the results obtained from electron microscopic measurements. XRD study revealed that the synthesized products were composed of orthorhombic structure and highly crystalline in nature. Furthermore, flaky like morphology of pure and Cu-BaSO4 nanoparticles have been observed from the images obtained from these studies. The existence of Cu(2+) was confirmed by EDS analysis. The functional groups of the synthesized samples were analysed by FT-IR study. The band gap energies of pure and doped samples were accomplished using UV-Vis-DRS analysis. Also, the kinetic parameters were evaluated and reported from the thermal stability of nanoparticles. Eventually, gram-negative bacteria shows the less antibacterial activities compared to gram-positive bacteria due to adsorption of BaSO4 nanoparticles on the surface of the used bacteria.
authors.affiliation: Department of Physics, Annamalai University, Annamalai Nagar 608 002, Tamil Nadu, India. Electronic address: girihari777@yahoo.com.
authors.forename: S
authors.initials: S
authors.lastname: Sivakumar
authors.affiliation: Department of Physics, Annamalai University, Annamalai Nagar 608 002, Tamil Nadu, India.
authors.forename: P
authors.initials: P
authors.lastname: Soundhirarajan
authors.affiliation: Department of Physics, Annamalai University, Annamalai Nagar 608 002, Tamil Nadu, India.
authors.forename: A
authors.initials: A
authors.lastname: Venkatesan
authors.affiliation: Department of Physics, Annamalai University, Annamalai Nagar 608 002, Tamil Nadu, India.
authors.forename: Chandra Prasad
authors.initials: CP
authors.lastname: Khatiwada
mesh_terms: D000900:Anti-Bacterial Agents / Q000737:chemistry* / Q000494:pharmacology*; D001466:Barium Sulfate / Q000737:chemistry*; D011232:Chemical Precipitation; D003300:Copper / Q000737:chemistry*; D004055:Differential Thermal Analysis; D008826:Microbial Sensitivity Tests; D008855:Microscopy, Electron, Scanning; D046529:Microscopy, Electron, Transmission; D053758:Nanoparticles / Q000737:chemistry*; D010316:Particle Size; D013052:Spectrometry, X-Ray Emission; D013056:Spectrophotometry, Ultraviolet; D017550:Spectroscopy, Fourier Transform Infrared; D013818:Thermogravimetry; D014961:X-Ray Diffraction
chemical_list: D000900:Anti-Bacterial Agents; D001466:Barium Sulfate; D003300:Copper
keywords: Cu-doped BaSO(4) NPs; FE-SEM with EDS; Kinetic parameters; TEM; TG–DTA; XRD