Utilization of the Terrestrial Weed Guduchi (Tinospora cordifolia) in Clean-Green Synthesis of Gold Nanoparticles

Abbasi, S. A.

doi:10.15226/2374-8141/1/3/00119

Cited by 5 publications

(9 citation statements)

References 18 publications

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“…6) [27,41]. The band at 1650 cm −1 is attributed to C=O stretching, whereas the band at 1550 cm −1 is attributed to N–H bending and C–N stretching, thus confirming the presence of amines; this is similar to observations by others [4,35,42]. Thus, Fig.…”

Section: Resultssupporting

confidence: 88%

Production of gold nanoparticles by electrode-respiring Geobacter sulfurreducens biofilms

Tanzil

Sultana

Saunders

et al. 2016

Enzyme and Microbial Technology

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The goal of this work was to synthesize gold nanoparticles (AuNPs) using electrode-respiring Geobacter sulfurreducens biofilms. We found that AuNPs are generated in the extracellular matrix of Geobacter biofilms and have an average particle size of 20 nm. The formation of AuNPs was verified using TEM, FTIR and EDX. We also found that the extracellular substances extracted from electrode-respiring G. sulfurreducens biofilms reduce Au3+ to AuNPs. From FTIR spectra, it appears that reduced sugars were involved in the bioreduction and synthesis of AuNPs and that amine groups acted as the major biomolecules involved in binding.

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Section: Resultssupporting

confidence: 88%

Production of gold nanoparticles by electrode-respiring Geobacter sulfurreducens biofilms

Tanzil

Sultana

Saunders

et al. 2016

Enzyme and Microbial Technology

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“…The presence of hydroxyl groups could be associated with compounds such as polyphenols, fatty acids, and monosaccharides [ 13 , 14 ]. The peak at 1730 cm −1 is associated with the stretching vibration of the C=O steroids [ 9 , 14 , 15 ]. The peak at 1630 cm −1 corresponds to the C=C bond of olefin.…”

Section: Resultsmentioning

confidence: 99%

“…The peak at 1630 cm −1 corresponds to the C=C bond of olefin. Peaks at 1180 cm −1 and 950 cm −1 , both present in the nanoparticles and the extract, could be associated with the stretching vibrations of the C=O and C-O-C groups, respectively [ 15 ]. Also, near 720 cm −1 , a strong band appears, typical of the C-H groups [ 1 , 16 ].…”

Section: Resultsmentioning

confidence: 99%

Nonirritant and Cytocompatible Tinospora cordifolia Nanoparticles for Topical Antioxidant Treatments

González-Masís

Cubero-Sesín

Corrales-Ureña³

et al. 2020

International Journal of Biomaterials

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Tinospora cordifolia extract contains antioxidants such as polyphenols, and thus, it has been used as a natural phytochemical antioxidant therapeutic agent. Many of these compounds are insoluble or only partially soluble in water. In this study, we produced a novel aqueous nanoparticle formulation, with an average particle size of 182.9 ± 3.8 nm, to improve the dispersion of the bioactive compounds in water and to increment its bioavailability. The nanoparticles are composed of polyphenols, alkaloids, and glycosides. We studied the effect of this nanoparticle formulation on mouse 3T3 fibroblast cell viability and New Zealand rabbit dermal irritability tests. Concentrations of 2.5, 25, and 250 µg/mL resulted in similar cell viability to cells in culture media. An intermediate concentration of 12.45 mg/ml was used for the acute dermal irritability test. There were no severe alterations that compromised animal health. These results represent a precedent for application of such nanoparticles derived from plant stems, such as Tinospora cordifolia, in biomedicine and in antiaging cosmetic treatments.

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“…The spectra (Figure 15) show bands at 3425 and 1385 cm 21 which could be assigned to OAH stretch of the carboxylic group. The bands at 1629 cm 21 can be attributed to the binding of the (NH) C@O (proteins and amino acids) groups with the nanopar-ticles [29]. The bands at 2920 and 1030 cm 21 correspond to the CAH stretch in methylene groups and CAN stretching vibrations of aliphatic amines respectively.…”

Section: Dynamic Light Scattering Studiesmentioning

confidence: 99%

“…, several authors have successfully used extracts of different plants—mainly of the leaves—for extracellular synthesis of nanoparticles. The work has been reviewed on several occasions and is characterized by two attributes: (i) in a vast majority of reports plants which have well‐established other uses such as cereals, vegetables, fruits, spices, medicinals, cosmetics, and ornamentals have been employed; and (b) only one or the other part of the plants, mostly leaves, have been employed.…”

Section: Introductionmentioning

confidence: 99%

Utilization of the terrestrial weed Antigonon leptopus in the rapid and green synthesis of stable gold nanoparticles with shape/size control

Ganaie

Abbasi

2015

Env Prog and Sustain Energy

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We report for the first time the utilization of a highly invasive weed Antigonon leptopus in synthesizing gold nanoparticles. For this purpose, aqueous extracts of the weed's leaves/stem/roots served the dual purpose of reducing gold ions to uncharged metal nanoparticles and then capping the nanoparticles thus formed to stabilize them. The synthesis occurs very swiftly leading to spherical, hexagonal, or triangular nanoparticles. The influence of the key variables that control the shape/size of the gold nanoparticles (AuNPs)—concentrations of the extract relative to Au (III), temperature, interaction time, stirring, and pH‐was studied employing UV–visible spectrophotometry, scanning electron microscopy, transmission electron microscopy, energy dispersive analysis of X‐rays, dynamic light scattering (DLS), X‐ray diffraction, and Fourier transform infrared spectroscopy. Besides being simple and rapid, the present process is distinguished by its ability to gainfully utilize an otherwise harmful plant in a manner which consumes little energy and generates no waste emissions. The AuNPs were found to catalyze the degradation of organic pollutants Congo red and Remazol Brilliant Blue R. © 2015 American Institute of Chemical Engineers Environ Prog, 35: 20–33, 2016

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Utilization of the Terrestrial Weed Guduchi (Tinospora cordifolia) in Clean-Green Synthesis of Gold Nanoparticles

Cited by 5 publications

References 18 publications

Production of gold nanoparticles by electrode-respiring Geobacter sulfurreducens biofilms

Production of gold nanoparticles by electrode-respiring Geobacter sulfurreducens biofilms

Nonirritant and Cytocompatible Tinospora cordifolia Nanoparticles for Topical Antioxidant Treatments

Utilization of the terrestrial weed Antigonon leptopus in the rapid and green synthesis of stable gold nanoparticles with shape/size control

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