Biogenic Syntheses of Gold Nanoparticles Using Plant Extracts

Pasca, Roxana-Diana; Mocanu, Aurora; Cobzac, Simona Codruța Aurora; Petean, Ioan; Horovitz, Ossi; Tomoaia-Cotişel, Maria

doi:10.1080/02726351.2013.839589

Cited by 60 publications

(35 citation statements)

References 41 publications

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“…The XRD analysis was found to be consist with the results of other researchers using plant extracts to produce Au nanoparticles. [30][31][32] Furthermore, the presence of elemental Au in the samples was also confirmed by EDS compositional analysis of the samples as shown in ( Figure 3B). Samples were also examined with SEM to confirm the presence of Au nanoparticles.…”

Section: Discussionmentioning

confidence: 57%

“…These advantages include the purity, biocompatibility, and eco-friendly nature of the synthesized Au nanoparticles. 24,25 Furthermore, agricultural plant wastes have also been examined recently as a possible renewable source of biomass for producing high quality Au nanoparticles. [26][27][28] The present study has examined the viability of using a large horticultural waste, in this case Macadamia nut shells, to produce Au nanoparticles with antibacterial properties.…”

Section: Discussionmentioning

confidence: 99%

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Green synthesis of gold nanoparticles from waste macadamia nut shells and their antimicrobial activity against Escherichia coli and Staphylococcus epidermis

2019

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Background: The study for the first time demonstrates an eco-friendly and room temperature procedure for biosynthesizing gold (Au) nanoparticles from waste Macadamia nut shells. Currently Australia contributes around 40% to the global market and generates around AUS $150 million of export revenue. However, a consequence of large nut production is the generation of large quantities of waste nut shells. The green chemistry-based method is clean, nontoxic and eco-friendly. The method presented in this study produced a variety of Au nanoparticle sizes and shapes.Methods: The straightforward green chemistry-based technique used waste Macadamia nut shells to generate Au nanoparticles, which were subsequently studied using several advanced characterization techniques. Furthermore, the Kirby-Bauer sensitivity method was used to evaluate the antibacterial properties of the extracts and synthesized gold nanoparticles.Results: Advanced characterisation revealed the Au nanoparticles were crystalline, ranged in size from 50nm up to 2µm, and had spherical, triangular and hexagonal morphology. The gram-negative bacteria Escherichia coli produced a maximum inhibition zone of 11mm, while Staphylococcus epidermidis produced a maximum inhibition zone of 9mm.Conclusions: The study has shown that waste Macadamia nut shell extracts have no antibacterial activity, but the synthesised Au nanoparticles did display antibacterial activity to both Escherichia coli and Staphylococcus epidermidis. Thus, the present work has demonstrated a waste valorisation strategy that can be used to produce high-value Au nanoparticles with antimicrobial properties for use in future pharmaceuticals.

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Section: Discussionmentioning

confidence: 57%

Section: Discussionmentioning

confidence: 99%

Green synthesis of gold nanoparticles from waste macadamia nut shells and their antimicrobial activity against Escherichia coli and Staphylococcus epidermis

2019

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“…The XRD analysis was found to be similar to the results reported by Singh et al [29] and Pasca et al, for the biosynthesis of Au nanoparticles using plant extracts. 30 EDS compositional analysis was used to confirm the presence of elemental Au in the samples. A representative analysis of a Green WM (3:1) sample is present in (Figure 3 b) and clearly shows strong signal peaks for Au in the sample.…”

Section: Discussionmentioning

confidence: 99%

“…Studies have shown these compounds assist in the formation of nanoparticles by acting as reducing agents and capping agents. [19][20][21] The green chemistry-based method is straightforward and begins by producing an aqueous extract from the plant material. An aqueous metal salt solution is then added to the plant extract (forming the reaction mixture).…”

Section: Introductionmentioning

confidence: 99%

Biogenic synthesis of gold nanoparticles from waste watermelon and their antibacterial activity against Escherichia coli and Staphylococcus epidermidis

et al. 2019

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Background: Globally, large quantities (tonnes) of diverse sources of food wastes derived from horticulture are produced and offer a valuable renewable source of biochemical compounds. Developing new recycling and food waste utilisation strategies creates unique opportunities for producing gold (Au) nanoparticles with desirable antibacterial properties. The present study used an eco-friendly procedure for biologically synthesizing gold (Au) nanoparticle shapes from waste Citrullis lanatus var (watermelon).Methods: The green chemistry-based procedure used in this study was straightforward and used both red and green parts of waste watermelon. The generated Au nanoparticles were subsequently evaluated using several advanced characterization techniques. The antibacterial properties of the various extracts and synthesised nanoparticles were evaluated using the Kirby-Bauer sensitivity method.Results: The advanced characterization techniques revealed the Au particles ranged in size from nano (100 nm) up micron (2.5 µm) and had a variety of shapes. The red watermelon extract tended to produce spheres and hexagonal plates, while the green watermelon extract tended to generate triangular shaped nanoparticles. Both red and green watermelon extracts produced nanoparticles with similar antibacterial properties. The most favourable response was achieved using a 5:1 green watermelon-based mixture for Staphylococcus epidermidis, which produced a maximum inhibition zone of 12 mm. While gram-negative bacteria Escherichia coli produced a maximum inhibition zone of 10 mm for the same mixture.Conclusions: The study has shown both red and green parts of waste watermelon can be used to produce Au nanoparticles with antibacterial activity towards both Escherichia coli and Staphylococcus epidermidis. The study has also demonstrated an alternative method for producing high-value Au nanoparticles with potential pharmaceutical applications.

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“…Their improved mechanical, optical and electronic properties and specific surface-enhanced spectroscopies make them ultimate structures for budding applications in electronics, photonics, optical sensing and imaging, biomedical labeling and sensing, catalysis and electronic devices among others [21]. Spherical, oval and other polyhedral gold nanoparticles have been synthesized using three different plant extracts Angelica, Hypericum, and Hamamelis [22]. An excellent electrocatalytic activity towards the oxidation of methanol and the reduction of oxygen was achieved by gold nanoflowers (GNFs) synthesized using N-2-hydroxyethylpiperazine-N-2-ethanesulphonic acid (HEPES) in one-pot synthesis [23].…”

Section: Introductionmentioning

confidence: 99%

Flower-shaped gold nanoparticles synthesized using Kedrostis foetidissima and their antiproliferative activity against bone cancer cell lines

Firdhouse

Pottail

2016

Int J Ind Chem

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Three different methods were employed for the synthesis of biogenic gold nanoparticles using the aqueous extracts of Kedrostis foetidissima. The interaction of gold nanoparticles with the phytoconstituents was investigated by FTIR. The complete reduction of chloroaurate ions to gold nanoparticles was monitored using UV-visible spectroscopy under the different plant extract concentration and conditions. The formation of gold nanoparticles was confirmed using XRD, SEM and TEM analysis. The anisotropic and flower-shaped gold nanoparticles of size below 25 nm was confirmed by TEM analysis. Cucurbitacins, the chief constituents of K. foetidissima probably might have interacted with the chloroaurate ions, facilitating the formation of gold nanoparticles. KFL-mediated AuNPs showed 88 % cell viability against bone cancer cell lines at 200 lg/ml concentration using MTT assay. This may be due to the formation of flower-shaped nature of KFL-mediated AuNPs. The novelty of the work lies in the plantmediated synthesis of biocompatible gold nanoparticles of size less than 25 nm showing 88 % of cell viability against bone cancer cell lines.

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Biogenic Syntheses of Gold Nanoparticles Using Plant Extracts

Cited by 60 publications

References 41 publications

Green synthesis of gold nanoparticles from waste macadamia nut shells and their antimicrobial activity against Escherichia coli and Staphylococcus epidermis

Green synthesis of gold nanoparticles from waste macadamia nut shells and their antimicrobial activity against Escherichia coli and Staphylococcus epidermis

Biogenic synthesis of gold nanoparticles from waste watermelon and their antibacterial activity against Escherichia coli and Staphylococcus epidermidis

Flower-shaped gold nanoparticles synthesized using Kedrostis foetidissima and their antiproliferative activity against bone cancer cell lines

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