ABSTRACT

This study utilised the pulsed laser ablation in liquid (PLAL) technique with a switched neodymium-doped yttrium aluminium garnet (Nd+:YAG) laser to produce cinnamon materials in nano and micro particle forms. The laser parameters included a 1,064 nm wavelength, a 10 ns pulse duration, an ablation energy of 600 mJ and varying pulse numbers (400 and 800 pulse/second). Methanol was used as the liquid medium. The size of nano and micro particles in resected materials was determined using field-emission scanning electron microscopy (FESEM) measurements, the results revealed average nanoparticle diameters of 68 nm and 56 nm and average microparticle frame sizes of 4 μm and 3 μm, respectively. Ultraviolet-visible (UV-Vis) spectra measurements showed two peaks for the nano-material and two irregular peaks for the micro material. The prepared material, in both nano and micro forms, was utilised to inhibit two types of bacteria through 800 pulse/sec. It was observed that the nano-material exhibited a significant antibacterial effect against these bacteria.

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