A green chemical approach for synthesis of shape anisotropic gold nanoparticles

Kamal, S.S. Kalyan; Vimala, J.; Sahoo, Prasanta Kumar; Ghosal, Partha; Ram, S.; Durai, L.

doi:10.1007/s40089-014-0109-4

Cited by 19 publications

(4 citation statements)

References 23 publications

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“…The SPR phenomenon essentially provides a unique fingerprint for characterizing and identifying the presence of AuNPs within the reaction mixture. Similar behaviors of Au nanoparticles were also recorded from [16].…”

Section: Fig 3 Surface Plasmon Resonance (Spr) Spectra Of Aunpssupporting

confidence: 79%

“…The resemblance between the absorption peaks of these plant-mediated AuNPs and the findings reported by [16] is noteworthy. This similarity in functional compounds within the infrared spectrum strongly supports the assertion that AuNPs are capably encased by saponins, the active phyto-constituents primarily found in the leaves of A. tuberosum.…”

Section: Identification Of Functional Groups Using Ft-irsupporting

confidence: 71%

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Green Synthesis of Gold Nanoparticles using Aqueous Extract of <i>Allium tuberosum</i> Leaves

Eugenio,

De Guzman,

Sanidad

et al. 2024

JBBBE

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Gold nanoparticles (AuNPs) have garnered significant interest in the field of biomaterials and biomedical engineering due to their wide-ranging applications, excellent biocompatibility, low toxicity, and customizable stability. This study focuses on synthesizing AuNPs through an environmentally friendly approach, specifically by utilizing the aqueous leaf extract of Allium tuberosum as both a reducing and capping agent. The synthesized AuNPs were characterized using UV-Vis Spectroscopy, revealing an absorption peak at 548 nm within the surface plasmon resonance (SPR) of AuNPs. Morphological analysis conducted via SEM showed a mixture of rod-shaped and spherical-shaped AuNPs, with dimensions of 41.0 nm (width) and 181.6 nm (length) confirmed through DLS measurements. EDX analysis confirmed the high abundance of gold in the synthesized AuNPs. Furthermore, a zeta potential value of -26.2 mV indicates that the AuNPs have decent stability. Phytochemical analyses and FT-IR results implicated that the Saponin present in the Allium tuberosum leaf extract played a crucial role in reducing metal ions and stabilizing the AuNPs. The potential of Allium tuberosum leaf extract for synthesizing diverse metal nanoparticles highlights its promise for biomaterials and biomedical engineering. The synthesized AuNPs show versatility for applications like targeted drug delivery, non-invasive imaging, and emerging biomedical uses.

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Section: Fig 3 Surface Plasmon Resonance (Spr) Spectra Of Aunpssupporting

confidence: 79%

Section: Identification Of Functional Groups Using Ft-irsupporting

confidence: 71%

Green Synthesis of Gold Nanoparticles using Aqueous Extract of <i>Allium tuberosum</i> Leaves

Eugenio,

De Guzman,

Sanidad

et al. 2024

JBBBE

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“…The intensity of the peaks further indicates that the synthesized AuNPs are of a high degree of crystallinity and hence the responsible phytochemicals can reduce Au 3+ and stabilize the AuNPs formed. Following Debye-Scherrer formula was used to calculate an average particle size of the AuNPs: 76,77 D=Kλ/βcosθ Where, D is the average crystalline size, K is the Scherrer constant, λ is the X-ray radiation wavelength (1.54 Å), β is the full width at half maximum (FWHM) intensity of the diffraction peaks of (1 1 1) Bragg reflection, and θ is the diffraction angle. From the calculations, the average particle sizes of synthesized AuNPs were found to be 11 nm and nm for AuNPs/ GI and AuNPs/GC respectively, which were found close to the average particle size ~10 nm measured using HR-TEM.…”

Section: X-ray Diffraction Analysismentioning

confidence: 99%

**Green Synthesis of Gold Nanoparticles Mediated by Garcinia Fruits andTheir Biological Applications**

Kureshi

Vaghela²,

Kumar

et al. 2020

Pharm Sci

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Background: Green synthesis of gold nanoparticles (AuNPs) using medicinal plant extract is an emerging area of research due to their applicability in nanomedicines. Methods: In this study, aqueous extracts prepared from fruit-pericarps of two Garcinia species, G. indica (GI) and G. cambogia (GC) fruits which are important medicinally and commercially have been utilized for the synthesis of AuNPs. Various analytical techniques were utilized to characterize the synthesized AuNPs. The synthesized AuNPs were investigated for their biological properties such as antioxidant activity using the (2,2-diphenyl-1-picrylhydrazyl) DPPH model, cytotoxicity against MCF-7 (breast) cancer cell line, and antibacterial activity against two bacterial strains viz. B. subtilis and E. coli. Results: The absorption peak of the AuNPs is observed at 541 nm using UV–Visible spectroscopy. The high resolution – scanning electron microscopy images showed spherical with a triangular shape AuNPs and their average sizes were ranging from 2 – 10 nm and it was found to be in good agreement with the particle size of 8 – 11 nm determined using X-ray diffraction analysis. Fourier-transform infrared spectroscopy revealed that water-soluble biomolecules from the aqueous extracts of the Garcinia species played a crucial role in the formation of AuNPs. The synthesized AuNPs exhibited considerable cytotoxicity with IC50 values 34.55 µg/ml (GI) and 35.69 µg/ml (GC) against the MCF-7 cancer cell line. Furthermore, synthesized AuNPs also demonstrated significant antioxidant and antibacterial properties comparable to the standards used. Conclusion: AuNPs have been synthesized using a simple green approach. The synthesized AuNPs demonstrated promising cytotoxicity, antioxidant, and antibacterial properties.

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“…. For advanced applications, polyphenols were used as templates to prepare polyphenol‐metal nanocomposites and shape anisotropic gold nanoparticles …”

Section: Introductionmentioning

confidence: 99%

Propargyl resin derived from biosynthesized oligophenols for the application of high temperature composite matrix

Huang

Wang

2015

Can J Chem Eng

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A novel addition‐cure‐type propargyloligophenol resin for high‐temperature usage was prepared via a two‐step process: Horseradish Peroxidase (HRP) catalyzed oxidation polymerization of phenols to oligophenols, and Williamson etherification of oligophenols to propargyloligophenols. Propargyloligophenols possess an ideal processability for composite manufacture, i.e. good solubility, low melting point (< 50 °C), and thermal curability. As shown by Differential Scanning Calorimetry (DSC), propargyloligophenol resin upon heating experiences a broad thermal exothermic peak in the range of 175–300 °C peaking at around 260 °C. The cured resin is high‐temperature resistant with an initial decomposition temperature > 400 °C and an anaerobic char yield > 60 % at 700 °C. The mechanical properties of glass fabric‐reinforced propargyloligophenol laminate were superior to those of conventional phenolic resins. The results showed that propargyloligophenol resin is a prospective polymeric matrix for high temperature composites.

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A green chemical approach for synthesis of shape anisotropic gold nanoparticles

Cited by 19 publications

References 23 publications

Green Synthesis of Gold Nanoparticles using Aqueous Extract of <i>Allium tuberosum</i> Leaves

Green Synthesis of Gold Nanoparticles using Aqueous Extract of <i>Allium tuberosum</i> Leaves

**Green Synthesis of Gold Nanoparticles Mediated by Garcinia Fruits andTheir Biological Applications**

Propargyl resin derived from biosynthesized oligophenols for the application of high temperature composite matrix

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