Coriander leaf mediated biosynthesis of gold nanoparticles

Narayanan, Kannan Badri; Sakthivel, Natarajan

doi:10.1016/j.matlet.2008.08.044

Cited by 527 publications

(204 citation statements)

References 24 publications

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“…Previous reports from Huang et al (2007) on C. camphora show that silver nanoparticles may grow in a process involving rapid bioreduction and that they strongly influence the SPR in the water extract. This is accordance with the results obtained from bioreduction of silver nanoparticles using Spirulina Platensis, which showed that a SPR silver band occurred at 400-480 nm (Narayanan and Sakthivel 2008;Kasthuri et al 2009). …”

Section: Uv-visible Spectra Analysis and Colour Changesupporting

confidence: 92%

“…The spectra of AgNPs showed maximum absorption at 400 nm to the surface plasmon resonance of the formed silver nanoparticles. The colour change was due to the excitation of SPR in the production of silver nanoparticles (Narayanan and Sakthivel 2008;Xiaoming et al 2009). Previous reports from Huang et al (2007) on C. camphora show that silver nanoparticles may grow in a process involving rapid bioreduction and that they strongly influence the SPR in the water extract.…”

Section: Uv-visible Spectra Analysis and Colour Changementioning

confidence: 99%

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Biosynthesis of silver nanoparticles from Aloe vera leaf extract and antifungal activity against Rhizopus sp. and Aspergillus sp.

et al. 2014

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Silver nanoparticles are receiving increasing attention in the field of agriculture. This study aims at evaluating the antifungal properties of green synthesised silver nanoparticles (AgNPs) from Aloe vera leaf extract against two pathogenic fungus Rhizopus sp. and Aspergillus sp. Results revealed that synthesised nanoparticles showed strong absorption maximum at 400 nm corresponding to the surface plasmon resonance. The prepared nanoparticles were characterized by SEM, FT-IR and UVVis spectroscopy. From the scanning photograph it is clear that particles are heterogeneous in shape such as rectangular, triangular and spherical with uniform distribution. FT-IR study showed sharp absorption peaks at 1,631 and 3,433 cm -1 for amide and alcoholic hydroxide groups, respectively. On the other hand, synthesised silver nanoparticles showed highest antifungal activity against Aspergillus sp. than Rhizopus sp. by application of 100 lL of 1 M silver nanoparticles with maximum inhibition of the growth of fungal hyphae. However, microscopic observation revealed that synthesised nanoparticles caused detrimental effects on conidial germination along with other deformations such as structure of cell membrane and inhibited normal budding process of both the tested species. Therefore, it has been concluded that Aloe vera leaf extract origin silver nanoparticles have tremendous potentiality towards controlling pathogenic fungus. However, further research is needed to check the efficacy of sizedependent AgNPs on different species of fungus.

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Section: Uv-visible Spectra Analysis and Colour Changesupporting

confidence: 92%

Section: Uv-visible Spectra Analysis and Colour Changementioning

confidence: 99%

Biosynthesis of silver nanoparticles from Aloe vera leaf extract and antifungal activity against Rhizopus sp. and Aspergillus sp.

et al. 2014

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“…Gardea-Torresdey et al (2002 demonstrated gold and silver nanoparticle synthesis within live alfalfa plants from solid media. Biosynthesis of Au nanoparticles by plants, such as Azadirachta indica (Shankar et al 2004), Medicago sativa (Gardea-Torresdey et al 2002), Aloe vera (Chandran et al 2006), Cinnamomum camphora (Huang et al 2007), Pelargonium graveolens (Shankar et al 2003), Cymbopogon flexuosus (Shankar et al 2004), Tamarindus indica (Ankamwar et al 2005), Coriandrum sativum (Narayanan and Sakthivel 2008) have also been reported, thus extracellular nanoparticle synthesis using plant leaf extracts rather than whole plants would be more economical owing to easier downstream processing. Review of literature revealed that synthesis of nanoparticles using marine algae has been unexplored, which attracted our interest in the present investigation.…”

Section: Introductionmentioning

confidence: 99%

Facile green synthesis of variable metallic gold nanoparticle using Padina gymnospora, a brown marine macroalga

et al. 2012

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The process of development of reliable and eco-friendly metallic nanoparticles is an important step in the field of nanotechnology. To achieve this, use of natural sources like biological systems becomes essential. In the present work, extracellular biosynthesis of gold nanoparticles using Padina gymnospora has been attempted and achieved rapid formation of gold nanoparticles in a short duration. The UV-vis spectrum of the aqueous medium containing gold ion showed peak at 527 nm corresponding to the plasmon absorbance of gold nanoparticles. Scanning electron microscopy showed the formation of welldispersed gold nanoparticles. FTIR spectra of brown alga confirmed that hydroxyl groups present in the algal polysaccharides were involved in the gold bioreduction. AFM analysis showed the results of particle sizes (53-67 nm) and average height of the particle roughness (60.0 nm). X-ray diffraction (XRD) spectrum of the gold nanoparticles exhibited Bragg reflections corresponding to gold nanoparticles. This environment-friendly method of biological gold nanoparticle synthesis can be applied potentially in various products that directly come in contact with the human body, such as cosmetics, and foods and consumer goods, besides medical applications.

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“…Huang et al reported the formation of gold nanoparticles from the sun-dried leaves of Cinnamomum camphora [15]. The extracellular synthesis of gold nanoparticles using the leaf extract of Coriandrum sativum has been attempted by Narayanan and Sakthivel [16].…”

Section: Introductionmentioning

confidence: 99%

Biosynthesis of Silver and Gold Crystals Using Grapefruit Extract

Chen

Wang

et al. 2016

MATEC Web Conf.

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In this paper, biological synthesis of silver and gold crystals using grapefruit extract is reported. On treatment of aqueous solutions of silver nitrate and chloroauric acid with grapefruit extract, the formation of stable silver and gold particles at high concentrations is observed to occur. The silver particles formed are quasi-spherical or irregular with sizes ranging from several hundred nanometers to several microns. The gold quasi-spheres with holes on surfaces and with diameters ranging from 1 to 3 microns are obtained. The formation mechanism of silver and gold crystals is discussed, indicating that the soluble biomolecules such as protein(s) and vitamin C in grapefruit extract may play a crucial role in defining the morphology and/or crystal phase of silver and gold crystals.

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Coriander leaf mediated biosynthesis of gold nanoparticles

Cited by 527 publications

References 24 publications

Biosynthesis of silver nanoparticles from Aloe vera leaf extract and antifungal activity against Rhizopus sp. and Aspergillus sp.

Biosynthesis of silver nanoparticles from Aloe vera leaf extract and antifungal activity against Rhizopus sp. and Aspergillus sp.

Facile green synthesis of variable metallic gold nanoparticle using Padina gymnospora, a brown marine macroalga

Biosynthesis of Silver and Gold Crystals Using Grapefruit Extract

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