Biosynthesis protocols for colloidal metal oxide nanoparticles

Zikalala, Nkosingiphile; Matshetshe, Kabo; Parani, Sundararajan; Oluwafemi, Oluwatobi S.

doi:10.1016/j.nanoso.2018.07.010

Cited by 94 publications

(38 citation statements)

References 100 publications

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“…Plant extracts are mainly used for green synthesis of ZnO NPs, which act as a reducing as well as a stabilizing agent [19,20]. The green synthesis of ZnO NPs is inexpensive, easily scalable, and environmentally friendly [21].…”

Section: Introductionmentioning

confidence: 99%

Biodegradable Hybrid Nanocomposite of Chitosan/Gelatin and Green Synthesized Zinc Oxide Nanoparticles for Food Packaging

Kumar

Mudai

Roy

et al. 2020

Foods

129

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In the context of emerging global concerns with synthetic plastic packaging, alternative natural biodegradable packaging materials are gaining increasing attention for food packaging applications. In this study, chitosan and gelatin nanocomposite hybrid films containing green synthesized zinc oxide (ZnO) nanoparticles (NPs) were developed and microstructural properties were studied. Antimicrobial activity of the developed films was evaluated using both Gram negative (Escherichia coli) and Gram positive bacteria (Staphylococcus aureus). Green synthesis protocol was used for the precipitation of ZnO NPs using fruit extract of Cassia fistula. The as-synthesized polyhedral ZnO NPs were in the range of 20–40 nm (average size ≈29 nm). Reinforcement with ZnO NPs in the hybrid films lead to improved thermal stability, elongation-at-break (EAB), and compactness properties. The developed films with 2% and 4% ZnO NPs showed a smooth, compact, and heterogeneous surface morphology compared to the control (chitosan-gelatin hybrid) films. Disc diffusion assays showed that the nanocomposite film had significant antimicrobial activity against E. coli. The developed hybrid nanocomposite films have potential to be developed as biodegradable alternative for postharvest packaging of fresh fruits and vegetables.

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Section: Introductionmentioning

confidence: 99%

Biodegradable Hybrid Nanocomposite of Chitosan/Gelatin and Green Synthesized Zinc Oxide Nanoparticles for Food Packaging

Kumar

Mudai

Roy

et al. 2020

Foods

129

View full text Add to dashboard Cite

show abstract

“…In recent years, the biogenic synthesis of MO nanostructures using microorganisms or plant extracts have been of great interest to many scientists from around the world due to its cost-effectiveness, safety, versatility, mild conditions, and high production yield. 194,195 Moreover, this approach is environmentally friendly and allows to reduce or eliminate the use of toxic reaction precursors and solvents. In the synthetic procedure bacteria, fungi, yeast, and plant extracts act as reducing or stabilizing agents.…”

Section: Biogenic Synthesismentioning

confidence: 99%

Controlling the morphology of metal–organic frameworks and porous carbon materials: metal oxides as primary architecture-directing agents

et al. 2020

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“…These methods usually involve “wet” chemical synthesis in aqueous, ethanol, or other types of extracts obtained from plants, fungi, bacteria, or algae. Also, the major difference between the use of harsh/hazardous chemicals and extracts is that the obtained MONPs are generally functionalized by phytochemicals and are, therefore, biocompatible [2]. However, the yield and monodispersity of bio-prepared NPs, as well as reproducibility, are insufficient, due to differential concentrations of active compounds in raw material [3].…”

Section: Metal Oxide Nanoparticles: a General Overviewmentioning

confidence: 99%

Metal Oxide Nanoparticles in Therapeutic Regulation of Macrophage Functions

et al. 2019

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Macrophages are components of the innate immune system that control a plethora of biological processes. Macrophages can be activated towards pro-inflammatory (M1) or anti-inflammatory (M2) phenotypes depending on the cue; however, polarization may be altered in bacterial and viral infections, cancer, or autoimmune diseases. Metal (zinc, iron, titanium, copper, etc.) oxide nanoparticles are widely used in therapeutic applications as drugs, nanocarriers, and diagnostic tools. Macrophages can recognize and engulf nanoparticles, while the influence of macrophage-nanoparticle interaction on cell polarization remains unclear. In this review, we summarize the molecular mechanisms that drive macrophage activation phenotypes and functions upon interaction with nanoparticles in an inflammatory microenvironment. The manifold effects of metal oxide nanoparticles on macrophages depend on the type of metal and the route of synthesis. While largely considered as drug transporters, metal oxide nanoparticles nevertheless have an immunotherapeutic potential, as they can evoke pro- or anti-inflammatory effects on macrophages and become essential for macrophage profiling in cancer, wound healing, infections, and autoimmunity.

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Biosynthesis protocols for colloidal metal oxide nanoparticles

Cited by 94 publications

References 100 publications

Biodegradable Hybrid Nanocomposite of Chitosan/Gelatin and Green Synthesized Zinc Oxide Nanoparticles for Food Packaging

Biodegradable Hybrid Nanocomposite of Chitosan/Gelatin and Green Synthesized Zinc Oxide Nanoparticles for Food Packaging

Controlling the morphology of metal–organic frameworks and porous carbon materials: metal oxides as primary architecture-directing agents

Metal Oxide Nanoparticles in Therapeutic Regulation of Macrophage Functions

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