A green chemical approach for the synthesis of gold nanoparticles: characterization and mechanistic aspect

Das, Sujoy; Marsili, Enrico

doi:10.1007/s11157-010-9188-5

Cited by 104 publications

(54 citation statements)

References 31 publications

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“…Although many chemical and physical methods are still being used to produce inorganic nanomaterials, the shape and size of the NPs created using these methods cannot be controlled, which is important since size and shape affect NPs' physical, chemical, electronic, and biological properties [56,57].…”

Section: Biogenic Synthesismentioning

confidence: 99%

Metal, Metalloid, and Oxide Nanoparticles for Therapeutic and Diagnostic Oncology

Yazdi¹,

Sepehrizadeh²,

Mahdavi³

et al. 2016

Nano BioMed ENG

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Nanoparticles have comprehensively affected various sights of human life. Through the wide range of claims about nanosized particles and their functions, biomedical applications are of much interest among health care researchers due to the nanoparticles' potential for use in the process of disease diagnosis, control and treatment. In this regard, inorganic nanoparticles, which have high potential in diagnostic and therapeutic systems, have recently received much attention in oncology. Although inorganic nanoparticles initially seemed an appropriate tool for cancer imaging and diagnosis, their ability to attack cancerous cells as anticancer drugs or carriers in other drugs has also demonstrated promising results. The present review primarily provides a brief survey of various studies in which metal nanoparticles such as gold, silver, iron oxide, and metalloid nanoparticles viz. tellurium and bismuth were exploited for therapeutic or diagnostic purposes in oncology. Then the application of selenium nanoparticles as a therapeutic agent against cancer in in vitro and in vivo studies is reviewed in detail. Although inorganic nanoparticles seem to be useful tools for cancer imaging and diagnosis, their potential for attacking cancerous cells as anticancer substances or even carriers for anticancer medications should not be underestimated.

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Section: Biogenic Synthesismentioning

confidence: 99%

Metal, Metalloid, and Oxide Nanoparticles for Therapeutic and Diagnostic Oncology

Yazdi¹,

Sepehrizadeh²,

Mahdavi³

et al. 2016

Nano BioMed ENG

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“…This high interest in nanoparticles is because of their unique optical, magnetic, electronic and catalytic properties with their distinctive feature of size and shape [1,2]. Many of the existing physical and chemical methods suffer from few drawbacks such as high cost, use of environmentally hazardous chemicals and non-availability for medical applications due to presence of toxic capping agents [3,4].…”

Section: Introductionmentioning

confidence: 99%

Green synthesis of gold nanoparticles using marine algae and evaluation of their catalytic activity

et al. 2015

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The hazardous effects of current nanoparticle synthesis methods have steered researchers to focus on developing newer eco-friendly methods for synthesizing nanoparticles using non-toxic chemicals. Owing to the diverse applications of nanoparticles in various fields such as catalysis, medicine, diagnostics, and sensors, several novel green approaches have been explored for synthesizing nanoparticles using different natural sources such as plants, algae, bacteria, and fungi. Hence, in the present work, a green method for the synthesis of gold nanoparticles (AuNPs) under ambient conditions using aqueous extracts of marine brown algae is reported and the synthesized AuNPs were evaluated for their catalytic efficiency. The aqueous extracts of algae comprise reducing as well as capping agents required for the formation of AuNPs. The Fourier transform infrared spectra of the extracts revealed the presence of compounds having hydroxyl groups that are largely responsible for the reduction of auric chloride to AuNPs at room temperature. Results from high-resolution transmission electron microscopy and dynamic light scattering studies suggested that most of the biosynthesized AuNPs are nearly spherical in shape with an average size in the range of 27-35 nm. High negative values of zeta potential measurement confirmed the stability of AuNPs. Moreover, the reduction kinetics of AuNPs studied by UV-visible spectrophotometry showed that they have good catalytic efficiency in the degradation of dyes as well as reduction of nitro compounds in the presence of sodium borohydride as reducing agent. This simple process for the biosynthesis of gold nanoparticles is rapid, cost-effective and eco-friendly. The formation of AuNPs was observed with the change of pale yellow gold solution to ruby red color of gold nanoparticles and confirmed by surface plasmon spectra using UV-visible spectroscopy. Nanoparticles synthesized through such environmentally benign routes can be used for synthesizing many other metal nanoparticles as well as for a wide range of biomedical applications, for commercial production on a large scale and also can be used as efficient catalysts for different organic reactions.

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“…11,12 Most of these reducing and stabilizing agents were obtained from plants, 13,14 algae, bacteria and fungi. 14,15 For example, Raveendran et al 16 described a method to prepare NPs of gold, silver, and their alloys using glucose as a reducing agent and starch as a protective agent. The particle-size distributions obtained were in the range of 2-12 nm.…”

Section: Introductionmentioning

confidence: 99%

Green synthesis of gold nanoparticles using plant extracts as reducing agents

Elia¹,

Zach²,

Hazan³

et al. 2014

IJN

156

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Gold nanoparticles (GNPs) were prepared using four different plant extracts as reducing and stabilizing agents. The extracts were obtained from the following plants: Salvia officinalis , Lippia citriodora , Pelargonium graveolens and Punica granatum . The size distributions of the GNPs were measured using three different methods: dynamic light scattering, nanoparticle-tracking analysis and analysis of scanning electron microscopy images. The three methods yielded similar size distributions. Biocompatibility was examined by correlation of L-cell growth in the presence of different amounts of GNPs. All GNPs showed good biocompatibility and good stability for over 3 weeks. Therefore, they can be used for imaging and drug-delivery applications in the human body. High-resolution transmission electron microscopy was used to view the shapes of the larger GNPs, while infrared spectroscopy was employed to characterize the various functional groups in the organic layer that stabilize the particles. Finally, active ingredients in the plant extract that might be involved in the formation of GNPs are proposed, based on experiments with pure antioxidants that are known to exist in that plant.

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A green chemical approach for the synthesis of gold nanoparticles: characterization and mechanistic aspect

Cited by 104 publications

References 31 publications

Metal, Metalloid, and Oxide Nanoparticles for Therapeutic and Diagnostic Oncology

Metal, Metalloid, and Oxide Nanoparticles for Therapeutic and Diagnostic Oncology

Green synthesis of gold nanoparticles using marine algae and evaluation of their catalytic activity

Green synthesis of gold nanoparticles using plant extracts as reducing agents

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