Structural Analysis of Chemical and Green Synthesis of CuO Nanoparticles and their Effect on Biofilm Formation

Abstract

Copper oxide nanoparticles (CuO NPs) were synthesized by two methods. The first was chemical method by using copper nitrate Cu (NO3)2 and NaOH, while the second was green method by using Eucalyptus camaldulensis leaves extract and Cu (NO3)2. These methods easily give a large scale production of CuO nanoparticles. X-ray diffraction pattern (XRD) reveals single phase monoclinic structure. The average crystalline size of CuO NPs was measured and used by Scherrer equation which found 44.06nm from chemical method, while the average crystalline size was found from green method was 27.2nm. The morphology analysis using atomic force microscopy showed that the grain size for CuO NPs was synthesized by chemical and green methods were 77.70 and 89.24 nm, respectively. The effectiveness of copper oxide nanoparticles on bacteria was measured for both gram positive, negative and fungi, copper oxide minutes showed excellent efficacy on biofilm formation.

Solidification Enhancement in a Triple-Tube Latent Heat Energy Storage System Using Twisted Fins

“…Still, a major concern for the LHTES system is PCM's minimal thermal Energies 2021, 14, 7179 2 of 23 efficiency, which decreases the phase change rate [14][15][16][17]. Researchers developed several techniques to improve the heat transfer rate of such systems, including the expansion of the heat transfer surface area [18][19][20], adding micro or nano-sized particles [21][22][23][24], using cascade layer PCM [25], encapsulation techniques [26,27], changing the location of the heat transfer fluid (HTF) channel [28][29][30], fins combinations [31][32][33], conductive foams [34][35][36], and using magnetic fields [37,38].…”

Nano-Antibacterials Using Medicinal Plant Components: An Overview

“…ELE has the potential to reduce Cu (NO 3 ) 2 also, producing CuO-NPs of size about 27.2 nm, and the particles show excellent inhibitory effect on bacterial biofilm formation ( Ali et al, 2015 ). Not only biofilm cells, ELE-stabilized CuONPs are also more effective than commercially available bulk CuO molecules to kill even the planktonic cells of β-lactamase–producing Escherichia coli 336, Pseudomonas aeruginosa 621, and methicillin-resistant Staphylococcus aureus 1 ( Shanan et al, 2018 ). By the method of phytoreduction, ELE also produces nickel oxide nanoparticles (NiO-NPs) from the precursor nickel hexahydrate (NiNO 3 ⋅6H 2 O).…”

Green Synthesis of Manganese Dioxide Nanoparticles and its Biological

“…7,8 Although physical and chemical methods can be used to synthesize nanoscale materials, green Baghdad Science Journal manufacturing is the best alternative because it is more environmentally friendly. 9,10 Plant extracts can be used to create nanoscales instead of conventional biological techniques such as the microbial approach, which includes the time-consuming process of maintaining cell cultures.…”