“…Kannan et al were also reported similar FTIR signals for the Ni-O. 51 Thus, the FTIR results were corroborated the successful synthesis of phytomolecules-coated NiO nanoparticles that were capped with the biologically active plant’s phytochemicals.…”
Section: Resultsmentioning
confidence: 61%
“…The results indicated that a slight red shift appeared in the absorption spectrum of Ni-O compared to the previously reported study. 51 This redshift might occur because of the transfer of non-bonding electrons from the absorbed phytochemicals towards Ni’s vacant d orbitals, which further led to the electronic transition. The same redshift in absorption maxima was reported by Khan et al and Roy et al 9 , 52 Figure 3 UV-Visible spectra of ( A ) Abutilon indicum leaves extract, and ( B ) phytomolecules-coated NiO nanoparticles.…”
Section: Resultsmentioning
confidence: 99%
“…The strong adhesion of Ni 2+ ions to the bacterial cells disrupts the cell membrane, leading the bacterial cell to demise. 27 , 51 , 52 , 56 Figure 5 The antibacterial propensity in terms of ZOIs; ( A ) plant leaves extract, ( B ) chemically synthesized NiO nanoparticles, ( C ) phytomolecules-coated NiO nanoparticles (F = 1072.028, p < 0.001), and ( D ) antibacterial drug. Figure 6 ( A ) The representative agar plates of S. aureus treated with plant extract, phytomolecules-coated NiO nanoparticles, and standard drug.…”
“…Kannan et al were also reported similar FTIR signals for the Ni-O. 51 Thus, the FTIR results were corroborated the successful synthesis of phytomolecules-coated NiO nanoparticles that were capped with the biologically active plant’s phytochemicals.…”
Section: Resultsmentioning
confidence: 61%
“…The results indicated that a slight red shift appeared in the absorption spectrum of Ni-O compared to the previously reported study. 51 This redshift might occur because of the transfer of non-bonding electrons from the absorbed phytochemicals towards Ni’s vacant d orbitals, which further led to the electronic transition. The same redshift in absorption maxima was reported by Khan et al and Roy et al 9 , 52 Figure 3 UV-Visible spectra of ( A ) Abutilon indicum leaves extract, and ( B ) phytomolecules-coated NiO nanoparticles.…”
Section: Resultsmentioning
confidence: 99%
“…The strong adhesion of Ni 2+ ions to the bacterial cells disrupts the cell membrane, leading the bacterial cell to demise. 27 , 51 , 52 , 56 Figure 5 The antibacterial propensity in terms of ZOIs; ( A ) plant leaves extract, ( B ) chemically synthesized NiO nanoparticles, ( C ) phytomolecules-coated NiO nanoparticles (F = 1072.028, p < 0.001), and ( D ) antibacterial drug. Figure 6 ( A ) The representative agar plates of S. aureus treated with plant extract, phytomolecules-coated NiO nanoparticles, and standard drug.…”
“…We compared the diameter of S. aureus with E.coli , which indicates higher resistance of S. aureus to CdO NPs. The prepared NPs damaged the bacterial cell membrane inhibiting the metabolic enzymes activity present on bacterial cell membrane, which ultimately leads to cell death (Kannan, Radhika, Nikolova, et al, 2020; Karthik, Nikolova, et al, 2020). Previous studies indicated that small particle size, reactive oxygen species generation (ROS) and release of CdO 2 + ions facilitate to establish electrostatic interaction between bacterial cell surface and NPs (Aswini et al, 2020; Kannan, Dhanuskodi, et al, 2020; Kannan, Radhika, Vijayalakshmi, et al, 2020) as shown in Figure 7.…”
Section: Resultsmentioning
confidence: 99%
“…The formation and stability of the prepared CdO NPs was analysed within 250–650 nm of absorption range. The spectra was recorded through UV–Vis Halo DB‐20 spectrophotometer (Dynamical Ltd, Sydney, Australia), which was dispersed in ethanol (Kannan, Radhika, Nikolova, et al, 2020; Karami, Jamshidian, & Zakariazadeh, 2019; Karthik, Nikolova, et al, 2020; Saqib et al, 2019). The spectrophotometer worked in the reflection mode at a resolution of 1 nm.…”
Microbial mediated synthesis of metallic nanoparticles constitutes as effective and promising approach for the development of antibacterial materials in the field of bioengineering and biomedicine. We prepared Cadmium oxide nanoaprticles (CdO NPs) utilizing Penicillium oxalicum, and cadmium acetate solution via coprecipitate method. The elemental composition and morphology of these synthesized CdO NPs were examined through X-ray diffraction (XRD), UV-Vis absorption spectroscopy, Fourier transform infrared spectroscopy (FTIR), Scanning electron microscopy (SEM), and Energy dispersive spectroscopy (EDS). Furthermore, we evaluated the bactericidal potential of prepared CdO NPs using Escherichia coli (E.coli), Staphylococcus aureus (S.aureus), Bacillus cereus (B.cereus), and Pseudomonas aeruginosa (P. aeruginosa). Dimethyl sulfoxide was used as negative control while erythromycin was used as positive control. The XRD spectrum revealed cubic crystalline nanoparticles with 22.94 nm size and UV showed absorbance peak at 297 nm with 2.5 eV band gap energy. FTIR depicted O─H and carboxylic groups along with CdO stretching vibration. EDS showed the presence of organic compounds on Cd and O over NPs surface. SEM results revealed the spherical shape of the CdO NPs. The synthesized NPs exhibited highly potent bactericidal activity against selected strains and demonstrated less optical density of 0.086 after 24 hr. Owing to the significant antibacterial activity of CdO NPs, the broad application prospects of these nanoparticles CdO NPs in extensive biomedical applications is indicated.
Particles with size in the range of 1-100 nm, considered in any dimension, are called nanoparticles (NPs). Among various nanoparticles, nickel oxide nanoparticles (NNPs) are important because of their physical, chemical, and biological properties. In the past two decades, significant research has been done on the synthesis of NNPs. Their applications range from energy storage to catalysis to antifungal and antibacterial activity. This review provides a brief overview of various methods used for synthesizing NNPs, their properties, and their applications. The synthesis methods are classified into physical synthesis, chemical synthesis, and green synthesis involving plants and microorganisms, especially fungi. Particular focus is given to the types of precursors used for their synthesis, morphology, particle size, and applications.
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