Biosynthesis of gold nanoparticles: A green approach

Ahmed, Shakeel; Annu, .; Ikram, Saiqa; S, Salprima Yudha

doi:10.1016/j.jphotobiol.2016.04.034

Cited by 366 publications

(132 citation statements)

References 139 publications

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“…It has been reported that natural extracts from microorganisms, plants and other material can be used to prepare AuNPs. However, the active ingredients were not clear and the process was relatively complicated and time-consuming [11,12,13]. It is imperative to find the biopolymers with a defined structure to obtain AuNPs by the green synthesis method [2,10].…”

Section: Introductionmentioning

confidence: 99%

Green Synthesis of Gold Nanoparticles Using Carrageenan Oligosaccharide and Their In Vitro Antitumor Activity

et al. 2018

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Gold nanoparticles (AuNPs) have been widely used in catalysis, photothermal therapy, and targeted drug delivery. Carrageenan oligosaccharide (CAO) derived from marine red algae was used as a reducing and capping agent to obtain AuNPs by an eco-friendly, efficient, and simple synthetic route for the first time. The synthetic conditions of AuNPs were optimized by response surface methodology (RSM), and the CAO-AuNPs obtained were demonstrated to be ellipsoidal, stable and crystalline by means of transmission electron microscopy (TEM), scanning electron microscopy (SEM) and X-ray diffraction (XRD). The CAO-AuNPs showed localized surface plasmon resonance (LSPR) oscillation at about 530 nm with a mean diameter of 35 ± 8 nm. The zeta potential of CAO-AuNPs was around −20 mV, which was related to the negatively charged CAO around AuNPs. The CAO-AuNPs exhibited significant cytotoxic activities to HCT-116 and MDA-MB-231 cells, which could be a promising nanomaterial for drug delivery.

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Section: Introductionmentioning

confidence: 99%

Green Synthesis of Gold Nanoparticles Using Carrageenan Oligosaccharide and Their In Vitro Antitumor Activity

et al. 2018

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“…Regarding the stability, the NPs are innoxious due to coating of biological molecules and hence, they are more biocompatible than the NPs prepared by chemical methods [3]. The biomolecules present in the extract of plants act as stabilizing agents in the formation of NPs [4,5].…”

Section: Introductionmentioning

confidence: 99%

Biosynthesis of ZnO nanoparticles using Jacaranda mimosifolia flowers extract: Synergistic antibacterial activity and molecular simulated facet specific adsorption studies

Sharma

Sabela

Kanchi

et al. 2016

Journal of Photochemistry and Photobiology B: Biology

151

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The naturally occurring biomolecules present in the plant extracts have been identified to play an active role in the single step formation of nanoparticles with varied morphologies and sizes which is greener and environmentally benign. In the present work, spherical zinc oxide nanoparticles (ZnO NPs) of 2-4nm size were synthesized using aqueous extract of fallen Jacaranda mimosifolia flowers (JMFs), treated as waste. The microwave assisted synthesis was completed successfully within 5min. Thereafter, phase identification, morphology and optical band gap of the synthesized ZnO NPs were done using X-ray diffraction (XRD), high resolution transmission electron microscopy (HRTEM) and UV-Visible spectroscopy techniques. The composition of JMFs extract was analyzed by gas chromatography-mass spectrometry (GC-MS) and the ZnO NPs confirmation was further explored with fourier transform infrared spectroscopy (FTIR). The GC-MS results confirmed the presence of oleic acid which has high propensity of acting as a reducing and capping agent. The UV-Visible data suggested an optical band gap of 4.03eV for ZnO NPs indicating their small size due to quantum confinement. Further, facet specific adsorption of oleic acid on the surface of ZnO NPs was studied computationally to find out the impact of biomolecules in defining the shape and size of NPs. The viability of gram negative Escherichia coli and gram positive Enterococcus faecium bacteria was found to be 48% and 43%, respectively at high concentration of NPs.

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“…These plant extracts are commercially used for many applications [71]. Recently, the plant extracts obtained with water as medium have been extensively used for the synthesis of metal nanoparticles of silver, gold, palladium, platinum, etc [72,73]. Biological synthesis of metal nanoparticles has extensively been performed for the silver and gold nanoparticles and is summarized in many reviews [40,41,[74][75][76][77][78][79][80].…”

Section: Chemistry Of Plant Extractsmentioning

confidence: 99%

Plant‐Mediated Biogenic Synthesis of Palladium Nanoparticles: Recent Trends and Emerging Opportunities

Vishnukumar¹,

Vivekanandhan²,

Muthuramkumar³

2017

ChemBioEng Reviews

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Nanoparticles of silver, gold, palladium and platinum are widely applied in medicine, sensor, energy and catalysis and have been widely investigated for their unique physicochemical properties. Next to silver and gold nanoparticles, palladium receives extensive attention due to their distinctive size‐dependent catalytic performance. Traditionally, Pd nanoparticles have been synthesized using various physical and chemical methods involving sophisticated equipment and excessive chemicals. Expanding demand and the emerging economic/environmental concerns in synthesizing palladium nanoparticles created the necessity for the development of simple, eco‐friendly, and cost effective processes. Within this context, biological processes that use plants, microorganisms, enzymes and biochemicals have been used for the synthesis of Pd nanoparticles as the green alternative. The aim of this article is to review the recent biological trends in the synthesis of Pd nanoparticles employing various plants and their effective utilization.

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Biosynthesis of gold nanoparticles: A green approach

Cited by 366 publications

References 139 publications

Green Synthesis of Gold Nanoparticles Using Carrageenan Oligosaccharide and Their In Vitro Antitumor Activity

Green Synthesis of Gold Nanoparticles Using Carrageenan Oligosaccharide and Their In Vitro Antitumor Activity

Biosynthesis of ZnO nanoparticles using Jacaranda mimosifolia flowers extract: Synergistic antibacterial activity and molecular simulated facet specific adsorption studies

Plant‐Mediated Biogenic Synthesis of Palladium Nanoparticles: Recent Trends and Emerging Opportunities

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