Browsing by Author "Agus, O"

Now showing 1 - 2 of 2
  • No Thumbnail Available
    Item
    Metal borate nanostructures for industrial antibacterial ceramic fabrication
    Agus, O; Arslan, O; Abali, Y
    Silver and copper borate nanostructures were mechanistically synthesized for novel boron-containing antibacterial applications. Different concentration, temperature, time parameters were varied for obtaining hierarchical formulations. Metal borate nanostructures showed interesting crystalline and optical properties since temperature and concentration adjustments provided correlated shape and surface properties with around 300 nm size. Chemical analysis and crystallinity of both copper and silver formulations were conducted with X-ray diffraction and unveiled that especially temperatures ranging from 40 to 90 degrees C has a huge impact on the formation of nanostructures. X-ray photoelectron spectroscopy analysis comprehensively provided all atomic compositions especially about boron atom at 191-192 eV range. Additionally, energy-dispersive X-ray analysis with scanning electron microscope measurements revealed the morphological properties of the nanostructures and showed the purity of the obtained materials. Finally, metal borate-containing glazes were obtained on 1 x 1 cm samples for antibacterial tests against Gram-positive and Gram-negative microorganisms.
  • No Thumbnail Available
    Item
    Facile and controlled production of silver borate nanoparticles
    Agus, O; Abali, Y; Arslan, O; San Keskin, NO
    Nanosized silver (Ag) borate particles were synthesized under facile and controlled conditions for the antibacterial ceramic applications. Obtained powder materials were characterized comprehensively for the detection of crystallinity, particle size, morphology and surface characteristics. Since obtained borate particles must be optimized by comparing their size, shape and composition, a statistical method (Taguchi Method) was used. Taguchi method allowed the control and deep insight on the variables namely temperature, reaction time, mol ratio and stirring speed. Since obtained nanoparticles can be easily modified and dispersed in ceramic matrixes, formation parameters for the best antibacterial glaze composition were defined. Structural analysis and crystallinity investigation with x-ray diffraction showed that temperature has a huge impact on the formation of nanoparticles as diffraction patterns revealed. Scanning Electron Microscopy unveiled that morphology of the nanoparticles are relatively spherical and EDX revealed that there is no other impurities. Synthesized nanoparticles were utilized for the 1 x 1 cm ceramic samples for antibacterial applications. Results showed that gram positive and gram negative bacterias are deactivated as tests revealed and reported.