Magnetic Field – Assisted Laser Ablation of Titanium Dioxide Nanoparticles in Water for Anti-Bacterial Applications

Abstract

Titanium oxide nanoparticles (TiO2) were produced by pulsed Nd:YAG laser ablation in water under the effect of an external magnetic field. Various techniques such as X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), energy Dispersive x-ray (EDX), transmission electron microscopy (TEM), UV-Vis spectroscopy, and Raman spectroscopy were used to characterize the TiO2 nanoparticles. The XRD analysis of titanium oxide nanoparticles revealed that the synthesized nanoparticles were polycrystalline with mixed of tetragonal anatase and rutile TiO2. Scanning electron microscope shows the formation of spherical nanoparticles and the particles agglomeration decreases and the particle size from increases from 25nm to 35nm when the magnetic field applied. The optical energy gap of TiO2 nanoparticles decreased from 4.6eV to 3.4eV after using the magnetic field during the ablation. Raman studies show the existence of five vibration modes belong to TiO2. The antibacterial effect assay revealed a largest inhibition zone in S. aureus and E. coli, with a more potent effect for TiO2 NPs prepared by magnetic field when compared with that prepared without presence of magnetic field.

Antibacterial Activity of Bismuth Oxide Nanoparticles Compared to Amikacin against Acinetobacter baumannii and Staphylococcus aureus

“…FTIR was measured on the functional groups present on the surface of Bi 2 O 3 NPs prepared from the laser ablation method were sections made by KBr pellet method (Bruker Equinox55, Germany) in the wavenumber scope of (400-4000)cm-1 on (FTLA 2000-100) version [17]. TEM (Philips EM 208S) was used to evaluate the morphology of the nanoparticles and size distribution [18]. AFM was used to determine the beneficial groups and position of each atom on a three-dimensional diagram of the surface topography of a substance at the atomic level (CSPM-AA3000) [19].…”

Phytosynthesis of Titanium Dioxide Nanoparticles Using King of Bitter Andrographis paniculata and Its Embryonic Toxicology Evaluation and Biomedical Potential

“…The zone of inhibition was measured in mm. Titanium dioxide nanoparticles are effectively involved in the inhibition of bacterial growth [ 41 , 42 ]. The antifungal activity was tested against Candida albicans .…”

Antineoplastic and Cytotoxic Evaluation of Green AgNPs and Crude Extracts from Agave americana, Mentha spicata, and Mangifera indica Leaves

“…The crystallinity of the fabricated AgNP pellets was evaluated by using an X-ray diffractometer (JDX-3532) with radiation of 1.54187 nm wavelength and a power setting of 30 kV/ 30 mA [21]. The diffractogram was then analyzed using software Origin 6.1, to calculate the average crystalline size by following Beer-Lambert Law, i.e., A = εbc, where "A" is the absorbance, "ε" is the molar absorptivity of the nanostructures, "b" is the path length of light, and "c" is the concentration of the sample.…”