Synthesis and Study of Structural Properties of Calcium Oxide Nanoparticles Produced by Laser-Induced Plasma and its Effect on Antibacterial Activity

Abstract

A LIBS technique was used to investigate the antibacterial activity of calcium oxide nanoparticles (CaO NPs). CaO NPs were prepared using a Q-switched Nd: YAG pulsed laser with a fundamental wavelength of 1064 nm at different energies (400-600 mJ) and constant frequency (6 Hz). A calcium powder sample was prepared after being pressed into a disc with a diameter of 1 cm. Analyzing X-ray diffraction (XRD) showed the crystalline structure of CaO NPs, crystalline size was 30.99±2 and 34.20±2.2 nm for laser energy 500 and 600 mJ. (FE-SEM) to reveal the topography of produced CaO NPs, the results showed a homogenous compact and dense surface with the formation of CaO NPs like flakes, cubes, and tubes. Atomic force microscopy (AFM) has shown that the CaO NPs were nanoscale and had a coordinated surface structures. The results also revealed the stabilizing zeta potential of the prepared CaO NPs, average (ZP) -18.3±1.6 mV in 600 mJ and -8.8±2.3 mV for 500 mJ. Different laser energies used in preparing CaO NPs resulted in the varying killing of the number of bacteria Klebsiella pneumoniae and Staphylococcus aureus bacteria. Complete bacterial inhibition or cell growth inactivation was found when the laser energy prepared for the CaO NPs was 600 mJ.

Spectroscopic and antibacterial activities of cobalt and nickel nanoparticles: a comparative analysis

“…9). Similar antibacterial activities have been reported by several researchers for NPs (Abbas and Aadim 2022;Ahghari et al 2020;Bensy et al 2022). Ahghari et al (Ahghari et al 2020) reported antibacterial activities of NiNPs against Staphylococcus aureus and Escherichia coli.…”

Spectroscopic and antibacterial activities of cobalt and nickel nanoparticles: a comparative analysis

“…9). Similar antibacterial activities have been reported by several researchers for NPs (Abbas and Aadim 2022;Ahghari et al 2020;Bensy et al 2022). Ahghari et al (Ahghari et al 2020) reported antibacterial activities of NiNPs against Staphylococcus aureus and Escherichia coli.…”

Investigation of the Structural Characteristics of Cadmium Oxide Nanoparticles Synthesised by Laser Ablation

“…The figure's apparent peaks further verify its concordance with previous studies and publications on CdO NP preparation [18,22,36]. Using the following Debye-Scherer equation, we were able to determine the nanoparticle's size [11]:…”

Engineering CaO@activated carbon nanocomposite for simultaneous energy storage and pollutant adsorption

“…The two separate peaks at 346 and 350 eV identify the part of CaO. 51,52 The analysis of the O 1s spectra in Fig. 2(h) shows the binding energy with the deconvoluted peaks, which provides detailed information on the presence of (O 2 -), OH, and adsorbed CO 2 in the CaO@AC nanocomposite.…”

“…3(c) ). The EDX analysis shows that the material has C (0.27 keV), 54 O (0.52 keV), 55 and Ca (1.25 keV), 51 respectively. The weight percentage of the NPs was further calculated by the EDS elemental composition analysis, which shows that the AC samples without impurities have a composition of 15.8% C, 41.4% O, and 42.8% Ca.…”

Spectroscopic and antibacterial activities of cobalt and nickel nanoparticles: a comparative analysis

“…9). Similar antibacterial activities have been reported by several researchers for NPs (Abbas and Aadim 2022;Ahghari et al 2020;Bensy et al 2022). Ahghari et al (Ahghari et al 2020) reported antibacterial activities of NiNPs against Staphylococcus aureus and Escherichia coli.…”

Investigation of the Structural Characteristics of Cadmium Oxide Nanoparticles Synthesised by Laser Ablation

“…The figure's apparent peaks further verify its concordance with previous studies and publications on CdO NP preparation [18,22,36]. Using the following Debye-Scherer equation, we were able to determine the nanoparticle's size [11]:…”

Engineering CaO@activated carbon nanocomposite for simultaneous energy storage and pollutant adsorption

“…The two separate peaks at 346 and 350 eV identify the part of CaO. 51,52 The analysis of the O 1s spectra in Fig. 2(h) shows the binding energy with the deconvoluted peaks, which provides detailed information on the presence of (O 2 -), OH, and adsorbed CO 2 in the CaO@AC nanocomposite.…”

“…3(c) ). The EDX analysis shows that the material has C (0.27 keV), 54 O (0.52 keV), 55 and Ca (1.25 keV), 51 respectively. The weight percentage of the NPs was further calculated by the EDS elemental composition analysis, which shows that the AC samples without impurities have a composition of 15.8% C, 41.4% O, and 42.8% Ca.…”

Spectroscopic and antibacterial activities of cobalt and nickel nanoparticles: a comparative analysis

“…9). Similar antibacterial activities have been reported by several researchers for NPs (Abbas and Aadim 2022;Ahghari et al 2020;Bensy et al 2022). Ahghari et al (Ahghari et al 2020) reported antibacterial activities of NiNPs against Staphylococcus aureus and Escherichia coli.…”

Investigation of the Structural Characteristics of Cadmium Oxide Nanoparticles Synthesised by Laser Ablation

“…The figure's apparent peaks further verify its concordance with previous studies and publications on CdO NP preparation [18,22,36]. Using the following Debye-Scherer equation, we were able to determine the nanoparticle's size [11]:…”

Engineering CaO@activated carbon nanocomposite for simultaneous energy storage and pollutant adsorption

“…The two separate peaks at 346 and 350 eV identify the part of CaO. 51,52 The analysis of the O 1s spectra in Fig. 2(h) shows the binding energy with the deconvoluted peaks, which provides detailed information on the presence of (O 2 -), OH, and adsorbed CO 2 in the CaO@AC nanocomposite.…”

“…3(c) ). The EDX analysis shows that the material has C (0.27 keV), 54 O (0.52 keV), 55 and Ca (1.25 keV), 51 respectively. The weight percentage of the NPs was further calculated by the EDS elemental composition analysis, which shows that the AC samples without impurities have a composition of 15.8% C, 41.4% O, and 42.8% Ca.…”