Green nanotechnology from tea: phytochemicals in tea as building blocks for production of biocompatible gold nanoparticles

Nune, Satish K.; Chanda, Nripen; Shukla, Ravi; Katti, Kavita; Kulkarni, Anjali; Thilakavathy, Subramanian; Mekapothula, Swapna; Kannan, Raghuraman; Katti, Kattesh V.

doi:10.1039/b822015h

Cited by 362 publications

(261 citation statements)

References 106 publications

(139 reference statements)

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“…Recently, the green synthesis or fabrication of Au nanostructures have been considerably studied by using harmless alternative biocompatible molecules such as proteins, peptides, cellulose, soybeans, gellan gum, vitamin B2, starch, and D-glucose as stabilizing or reducing agents [5][6][7][8][9][10][11][12][13][14]. We also developed a facile route for the synthesis of Au nanoparticles by the use of food additives [15].…”

Section: Introductionmentioning

confidence: 99%

Facile green synthesis of gold nanoparticles with gum arabic as a stabilizing agent and reducing agent

Chen

2010

Gold Bull

100

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A facile, completely green, and cheap route for the synthesis of Au nanoparticles at 25-75°C has been developed by using only hydrogen tetrachloroaurate as the precursor and gum arabic (GA) simultaneously as a reducing agent and a stabilizing agent. No extra reagents are needed. From the analyses of UV/VIS absorption spectra, TEM, HRTEM, SAED, and XRD patterns, the formation of Au nanoparticles with a fcc structure was recognized. The synthesis reaction was usually finished in 2-4 h. Increasing the reaction temperature increased the formation rate but had no significant effect on the optical property and size of Au nanoparticles. With increasing Au(III) ion concentration or GA concentration, the mean diameter of Au nanoparticles slightly increased. Also, the particle size distribution became broader at higher Au(III) ion concentration or lower GA concentration due to the insufficient protection. Although raising the GA concentration was helpful to reduce Au(III) ions completely and stabilize the Au nanoparticles, too high GA concentration was not suitable for the stabilization of Au nanoparticles because the increased intermolecular force of GA might hinder the dispersion of Au nanoparticles. Furthermore, the resultant Au nanoparticles were found to remain highly stable in the NaCl solution.

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Section: Introductionmentioning

confidence: 99%

Facile green synthesis of gold nanoparticles with gum arabic as a stabilizing agent and reducing agent

Chen

2010

Gold Bull

100

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“…Tea consists of two major categories of polyphenolic compounds, namely thearubigins and theaflavins. The three major constituents of theaflavins are Epigallocatechin gallate, Epigallocatechin and Epicatechin gallate [17]. Figure 1a-c depicts the chemical structures of Fig.…”

Section: Resultsmentioning

confidence: 99%

“…However, due to their cumbersome procedures such as maintaining cell cultures under specified laboratory conditions have made them less attractive, when compared to using plant products for synthesis of nanomaterials. Many plants or plant products have been employed for the synthesis of Au NPs, some of which include, Emblica officinalis, Acacia nilotica (Babool), alfalfa biomass, geranium, Azadirachta indica leaves, gum kondagogu, gram-beans and tea leaves [10][11][12][13][14][15][16][17]. Camellia sinensis commonly known as tea is a rich source of polyphenolic compounds, which exhibits a variety of health benefits such as protection against heart diseases, cancer and the paralytic actions of botulinum neurotoxins [18,19].…”

Section: Introductionmentioning

confidence: 99%

A green chemical approach for synthesis of shape anisotropic gold nanoparticles

et al. 2014

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A complete green chemical reaction between aurochloric acid and tea polyphenols resulted in the reduction of Au 3? ? Au 0 . The reaction was carried out in a Teflon-coated bomb digestion vessel at 200°C. It was observed that with increasing the reaction time from 1 to 5 h, the shape of the nanoparticles changed from sphericalto rod-like structures. The reaction was followed with the help of UV-vis spectrometer, which showed a single absorption peak at 548 nm for 1-h reaction product and two peaks for a 5-h reaction product at 533 and 745 nm corresponding to the transverse and longitudinal surface plasmon resonance bands. Microstructures obtained from transmission electron microscope revealed that the samples obtained after 1-h reaction are predominantly spherical in shape with an average size of 15 nm. Whereas samples obtained after 5 h of reaction exhibited rod-like structures with an average size of 45 nm.

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“…Numerous studies have shown that consumption of cruciferous vegetables lead to a consequent decrease in the incidence of many cancers [30]. Decrease in the risk of bladder cancer is also directly related to broccoli intake [31]. The effectiveness of Se in broccoli against cancer, the inclusion of many other anticancer compounds, and the general acceptability of broccoli by the public should make this vegetable an excellent source of supplemental dietary Se.…”

Section: Uv-vis Absorbance Spectroscopy Analysismentioning

confidence: 99%

Green Synthesis of Selenium Nanoparticles from Broccoli, Characterization, Application and Toxicity

Kapur¹,

Soni²,

Kohli³

2017

Adv Tech Biol Med

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Selenium in broccoliBroccoli belongs to the Brassicaceae family, originated in the Mediterranean regions and distributed in Europe and in the United States. Broccoli is rich in micronutrients such as carotene, vitamin C and folic acid-fibers, phytochemicals such as glucosinolates (GLs) and *Corresponding author: Kanchan Kohli, PhD, Associate Professor, Department of Pharmaceutics, Jamia Hamdard, Hamdard University, New Delhi 110062, India, Tel: +911126059688; E-mail: drkanchankohli@gmail.com AbstractPlant-based diets and phytochemicals present in plants can be used to decrease the risk of cancer. This article deals with Brassica species and broccoli in particular which are associated with reduced risk of several important cancers. These plants mainly contain selenium (Se) covalently bound in a number of different chemical forms which is mainly responsible for its biological activity. Further, several enzymes contain selenium in the form of the unusual selenocysteine amino acid which act on free radicals. Broccoli has the ability to accumulate Se many-fold beyond the concentration of Se present in the soil. Reflecting on the above it can be suggested that development of methods to increase the natural accumulation of Se in broccoli may greatly enhance its health-promoting properties. The present article details about green synthesis of selenium nanoparticles and their methods of characterizations. Green synthesis is a biological procedure which can be achieved can be achieved by using plant extracts. This method is capable of producing SeNPs in a size range of about 50-150 nm, under ambient conditions. It was found that SeNPs are able to inhibit the cell growth by dose-dependent manner. In addition, combination of SeNPs and doxorubicin shows better anticancer effect than individual treatments. The present review also brings to light about the causes and implications of toxic effects posed by Se nanoparticles as well as applications of Se nanoparticles in medicine.Green Synthesis of Selenium Nanoparticles from Broccoli, Characterization, Application and Toxicity Citation: Kapur M, Soni K, Kohli K (2017) Green Synthesis of Selenium Nanoparticles from Broccoli, Characterization, Application and Toxicity. Adv Tech Biol Med 5: 198. doi: 10.4172/2379-1764.1000198 Page 2 of 7 ManaviVolume Se Nanoparticles Characterization [42]An initial characterization of the test substance is imperative before any toxicity screening is commenced. A more extensive and complete characterization, including size distribution, shape, surface area, surface chemistry, crystallinity, porosity, agglomeration state, surface charge, solubility, etc., is recommended for nanomaterials in order to determine the correct correlation between their physicochemical properties and the biological effects they elicit [43][44][45][46].

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Green nanotechnology from tea: phytochemicals in tea as building blocks for production of biocompatible gold nanoparticles

Cited by 362 publications

References 106 publications

Facile green synthesis of gold nanoparticles with gum arabic as a stabilizing agent and reducing agent

Facile green synthesis of gold nanoparticles with gum arabic as a stabilizing agent and reducing agent

A green chemical approach for synthesis of shape anisotropic gold nanoparticles

Green Synthesis of Selenium Nanoparticles from Broccoli, Characterization, Application and Toxicity

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