A Review on Metal Nanostructures:  Preparation Methods and Their  Potential Applications

Qazi, Umair Yaqub; Javaid, Rahat

doi:10.4236/anp.2016.51004

Cited by 68 publications

(24 citation statements)

References 199 publications

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“…In previous studies, AgNPs disrupt transport systems, including ion efflux (Morones et al, 2005;Khadri et al, 2013 andQazi &Javaid 2016). Our results also presented in Table 1 clearly showed the presence of AgNPs increase the antifungal activities of chemical fungicides from 36% and 30% to 81% and 64% in case of Vitavax and Maxim XL, respectively.…”

Section: Antifungal Efficacy Of Agnps Against C Maydissupporting

confidence: 78%

Application of silver nanoparticles on Cephalosporium maydis in vitro and in vivo

El‐Gazzar

Rabie

2018

Egypt. J. Microbiol.

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I T IS NOTICEABLE that Cephalosporium maydis causes late wilt disease that is considered sole of the ultimate destructive diseases in Zea maize. The crop output is declined due to the infection riskiness raises. Silver nanoparticles (AgNPs) were prepared using a simple bio-reduction method, which is ecologically welcomed and cost-effective. In our investigation, the effect the antifungal activity of AgNPs was evaluated alone or combined with one of each two different fungicides on C. maydis in vitro and in vivo. An isolate of Aspergillus niger previously isolated and identified in our laboratory was used to induce AgNPs. The NPs production , s undergone to optimization study for increasing AgNPs product besides its stability. AgNPs production after optimization showed very stable product compared with those before optimization conditions. A significant increase in the absorbance was noticed from 0.8OD into 1.25OD and the NPs size decreased from 19nm into 9nm. In addition, TEM showed more obvious and clear AgNPs, in addition, a higher degree of stability and protein functional surface reactive groups at (-29.3mv) with single peak was revealed for six months. Under laboratory conditions, the higher rate of growth inhibition of C. maydis was obvious in case of using AgNPs either alone or combined with fungicides. Parallel results were found under greenhouse conditions where AgNPs caused a severe reduction in disease severity of C. maydis infected plants accounting (57.7%) alone or combined with Maxim XL (75.5%) or Vitavax (90%). This research opens up new possibilities in the field of using AgNPs in plant disease treatment.

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Section: Antifungal Efficacy Of Agnps Against C Maydissupporting

confidence: 78%

Application of silver nanoparticles on Cephalosporium maydis in vitro and in vivo

El‐Gazzar

Rabie

2018

Egypt. J. Microbiol.

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“…Previous studies have focused on the importance of metal nanoparticles such as silver (Ag), palladium (Pd), gold (Au), copper (Cu), and platinum (Pt) due to their unique physicochemical characteristics, nanoscale size, and surface plasmon behavior [5,[27][28][29][30]. Among these, silver nanoparticles (AgNPs) have unique and outstanding shape and size-dependent electrical, thermal, optical, catalytic, optoelectronic, anticancer, biosensing, medicinal, antiviral, and biological characteristics, which make them exceptional for several applications in a variety of fields and disciplines such as dentistry, drug delivery, biomedical, anticancer, antimicrobial, antioxidant, food science, agriculture, cosmetic, clothing, water treatment, larvicides, forensic science pollution control, waste management, photovoltaics, and chemistry [5,10,[30][31][32][33][34][35][36].…”

Section: Introductionmentioning

confidence: 99%

Artificial Sweeteners and Sugar Ingredients as Reducing Agent for Green Synthesis of Silver Nanoparticles

Hemmati

Retzlaff-Roberts

Scott

et al. 2019

Journal of Nanomaterials

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An environmentally friendly technique has been developed to produce metal nanoparticles using green synthesis methods. In this study, silver nanostructures were synthesized using different sugar substitutes and artificial sweeteners as green reducing agents in an aqueous solution at low temperature. The main ingredients (such as maltodextrin, sucrose, saccharin, and sucralose) of the artificial sweeteners acting as reducing agents were used to reduce Ag+ ions to Ag0. The pH of the solution was controlled during synthesis through the addition of sodium hydroxide (NaOH) to increase the strength of the reducing agents by converting nonreducing sugars to reducing ones and consequently increasing the rate of silver nanoparticle formation. The size and morphology of the synthesized nanostructures were characterized by transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM), scanning electron microscopy (SEM), and energy-dispersive X-ray spectroscopy (EDX). The formation of nanostructures during the course of the reactions was investigated by UV-visible (UV-vis) spectroscopy characterization of an aliquot of sample at specific intervals. The function of each artificial sweetener and corresponding ingredients as a reducing agent and capping agent was investigated by Fourier-transform infrared spectroscopy (FTIR) and mass spectrometry (MS).

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“…Nanotechnology is intended to be the blossoming multifaceted field and has been used in the extensive applications on drug delivery, food preservation, sensors, pharmaceutical industries, wastewater treatment etc. due to their astounding characteristics of nanomaterials with a higher surface area [1]. Metallic nanoparticles such as silver are concentrated for their improved performance in the antimicrobial activity, but the lack of paradoxical characteristics on recovery and reusability leads to the evolution of heterogeneous catalysts [2].…”

Section: Introductionmentioning

confidence: 99%

Integration ofCynodon dactylonandMuraya koenigiiplant extracts in amino‐functionalised silica‐coated magnetic nanoparticle as an effective sorbent for the removal of chromium(VI) metal pollutants

Vishnu¹,

Dhandapani²

2020

IET nanobiotechnol.

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Immobilised magnetic nanoparticles are extensively used owing to their superparamagnetic nature, surface interaction, and binding specificity with the appropriate portentous substances. The present research focuses on the development of a portentous, robust carrier, which integrates the silica-coated amino-functionalised magnetic nanoparticle (AF-MnP) with the plant extracts of Cynodon dactylon (L1) and Muraya koenigii (L2) for the stable and enhanced removal of hazardous hexavalent chromium pollutant in the wastewater. Vibrating sample magnetometer (M s-45 emu/g) determines the superparamagnetic properties; Fourier-transform infrared spectroscopy determines the presence of functional groups such as NH 2 , Si-O-Si, C=C; high-resolution transmission electron microscopy, field emission scanning electron microscope and energydispersive X-ray spectroscopy determine the size of the green adsorbents in the range of 20 nm and the presence of elements such as Fe, N, and Si determines the efficacy of the synthesised silica-coated AF-MnP. The AF-MnP-L1 shows the maximum adsorption capacity of 34.7 mg/g of sorbent calculated from the Langmuir isotherm model and the process follows pseudosecond-order kinetics. After treatment, the adsorbents can be easily separated from the solution in the presence of an external magnetic field and are reused for nine cycles after acid treatment with the minimal loss of adsorption efficiency.

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A Review on Metal Nanostructures: Preparation Methods and Their Potential Applications

Cited by 68 publications

References 199 publications

Application of silver nanoparticles on Cephalosporium maydis in vitro and in vivo

Application of silver nanoparticles on Cephalosporium maydis in vitro and in vivo

Artificial Sweeteners and Sugar Ingredients as Reducing Agent for Green Synthesis of Silver Nanoparticles

Integration ofCynodon dactylonandMuraya koenigiiplant extracts in amino‐functionalised silica‐coated magnetic nanoparticle as an effective sorbent for the removal of chromium(VI) metal pollutants

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