Controlled Synthesis of Saponin-Capped Silver Nanotriangles and Their Optical Properties

Debnath, Babli; Das, Ratan

doi:10.1007/s11468-019-00923-y

Cited by 18 publications

(5 citation statements)

References 52 publications

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“…The C-H stretching vibration of alkanes is usually seen around 2900 cm −1 and indicates the presence of aliphatic hydrocarbon chains in saponins. This peak may not change significantly after the synthesis of AgNPs, as the hydrocarbon chains are not involved in the reduction or capping process [ 57 ]. The C=O stretching vibration of carbonyls is usually seen around 1700 cm −1 and indicates the presence of carbonyl groups (C=O) in saponins.…”

Section: Discussionmentioning

confidence: 99%

“…Further confirmation of the successful synthesis of AgNPs was provided by transmission electron microscopy (TEM) images that showed polydispersed AgNPs 2–10 nm in size and with spherical shapes. As reported earlier [ 57 ], saponin-capped silver nanotriangles were prepared in an aqueous system using a Trigonella foenum-graecum seed extract. The synthesized nanoparticles were crystalline and triangular in shape, with an edge length of approximately 80 nm.…”

Section: Discussionmentioning

confidence: 99%

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Saponin-Derived Silver Nanoparticles from Phoenix dactylifera (Ajwa Dates) Exhibit Broad-Spectrum Bioactivities Combating Bacterial Infections

Adnan,

Siddiqui,

Ashraf

et al. 2023

Antibiotics

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The emergence of antibiotic resistance poses a serious threat to humankind, emphasizing the need for alternative antimicrobial agents. This study focuses on investigating the antibacterial, antibiofilm, and anti-quorum-sensing (anti-QS) activities of saponin-derived silver nanoparticles (AgNPs-S) obtained from Ajwa dates (Phoenix dactylifera L.). The design and synthesis of these novel nanoparticles were explored in the context of developing alternative strategies to combat bacterial infections. The Ajwa date saponin extract was used as a reducing and stabilizing agent to synthesize AgNPs-S, which was characterized using various analytical techniques, including UV–Vis spectroscopy, Fourier transform infrared (FTIR) spectroscopy, and transmission electron microscopy (TEM). The biosynthesized AgNPs-S exhibited potent antibacterial activity against both Gram-positive and Gram-negative bacteria due to their capability to disrupt bacterial cell membranes and the leakage of nucleic acid and protein contents. The AgNPs-S effectively inhibited biofilm formation and quorum-sensing (QS) activity by interfering with QS signaling molecules, which play a pivotal role in bacterial virulence and pathogenicity. Furthermore, the AgNPs-S demonstrated significant antioxidant activity against 2,2-diphenyl-1-picrylhydrazyl (DPPH) free radicals and cytotoxicity against small lung cancer cells (A549 cells). Overall, the findings of the present study provide valuable insights into the potential use of these nanoparticles as alternative therapeutic agents for the design and development of novel antibiotics. Further investigations are warranted to elucidate the possible mechanism involved and safety concerns when it is used in vivo, paving the way for future therapeutic applications in combating bacterial infections and overcoming antibiotic resistance.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Saponin-Derived Silver Nanoparticles from Phoenix dactylifera (Ajwa Dates) Exhibit Broad-Spectrum Bioactivities Combating Bacterial Infections

Adnan,

Siddiqui,

Ashraf

et al. 2023

Antibiotics

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“…It is reported that silver nanotriangle shows three absorption peaks corresponding to three different modes of plasmon oscillation such as in-plane dipole resonance, in-plane quadrupole plasmon resonance and out-of-plane quadrupole resonance [40]. The position of the band around 560 nm and strong band around 420 nm, respectively, due to in-plane dipole resonance and in-plane quadrupole plasmon resonance, are not fixed and these peaks get red-shifted with the increase in the edge length of the nanotriangle [41][42][43]. However, there is a fixed band at around 350 nm, which does not change with the change in the edge length.…”

Section: Uv/vis Spectroscopy Analysismentioning

confidence: 99%

Effects of saponin capped triangular silver nanocrystals on the germination of Pisum sativum , Cicer arietinum , Vigna radiata seeds & their subsequent growth study

Debnath

Sarkar²,

Das

2019

IET nanobiotechnol.

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In this study, saponin capped triangular silver nanocrystals have been synthesised using fenugreek seed extract, where the extract acts both as a reducing and capping agent. X-ray diffraction study confirms the purity and crystalline nature of the prepared nanocrystals and transmission electron microscopic study shows the triangular morphology with the average edge length of 72 nm, along with the atomic force microscopy study for the height or the width of the triangular nanocrystals. These nanocrystals have been investigated against a few pulses (seeds) such as Pisum sativum, Cicer arietinum and Vigna radiata for their effect on the germination as well as growth of root and shoot. Considering different concentration of silver nanocrystals solution, it has been found that 25 × 10 −4 and 80 × 10 −4 μg/ml are the minimum and maximum concentrations of silver nanocrystals, within this range, germination and subsequent growth of root and shoot are effective. The result shows significant positive influence on the growth of root and shoot of all seeds in comparison to those of unexposed control germination. Therefore, the result of this experiment has confirmed that the use of saponin capped silver nanocrystals enhances the germination and growth of plants.

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“…M. Hessien et al prepared ZnO-Bi 2 O 3 and La 2 O 3 -Fe 2 O 3 -Bi 2 O 3 using soapnut green synthesis-assisted microwave-hydrothermal method and studied the synthesized composites in radioactive shielding [27,28]. B. Debnath and colleagues prepared silver nanoparticles using soapnut extract as a reducing agent [29]. Au nanoparticles were prepared by V. Reddy and colleagues with the assistance of soapnut extract [22].…”

Section: Introductionmentioning

confidence: 99%

Effect of Synthesis Conditions on CuO-NiO Nanocomposites Synthesized via Saponin-Green/Microwave Assisted-Hydrothermal Method

Al-Yunus,

Al-Arjan,

Traboulsi

et al. 2024

Nanomaterials

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This work presents the synthesis of CuO-NiO nanocomposites under different synthesis conditions. Nanocomposites were synthesized by merging a green synthesis process with a microwave-assisted hydrothermal method. The synthesis conditions were as follows: concentration of the metal precursors (0.05, 0.1, and 0.2 M), pH (9, 10, and 11), synthesis temperature (150 °C, 200 °C, and 250 °C), microwave treatment time (15, 30, and 45 min), and extract concentration (20 and 40 mL of 1 g saponin/10 mL water, and 30 mL of 2 g saponin/10 mL water). The phases and crystallite sizes of the calcined nanocomposites were characterized using XRD and band gap via UV-Vis spectroscopy, and their morphologies were investigated using SEM and TEM. The XRD results confirmed the formation of a face-centered cubic phase for nickel oxide, while copper oxide has a monoclinic phase. The calculated crystallite size was in the range of 29–39 nm. The direct band gaps of the samples prepared in this work were in the range of 2.39–3.17 eV.

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Controlled Synthesis of Saponin-Capped Silver Nanotriangles and Their Optical Properties

Cited by 18 publications

References 52 publications

Saponin-Derived Silver Nanoparticles from Phoenix dactylifera (Ajwa Dates) Exhibit Broad-Spectrum Bioactivities Combating Bacterial Infections

Saponin-Derived Silver Nanoparticles from Phoenix dactylifera (Ajwa Dates) Exhibit Broad-Spectrum Bioactivities Combating Bacterial Infections

Effects of saponin capped triangular silver nanocrystals on the germination of Pisum sativum , Cicer arietinum , Vigna radiata seeds & their subsequent growth study

Effect of Synthesis Conditions on CuO-NiO Nanocomposites Synthesized via Saponin-Green/Microwave Assisted-Hydrothermal Method

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