Synthesis of Silver Nanoparticles and the Development in Analysis Method

Badi’ah, Hanim Istatik; Seedeh, F; Supriyanto, Ganden; Zaidan, Andi Hamim

doi:10.1088/1755-1315/217/1/012005

Cited by 54 publications

(47 citation statements)

References 11 publications

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“…According to the literature and our previous results, the characteristic surface plasmon peaks of silver nanoparticles can undergo various changes due to interfering agents in the liquid media [16,18,24]. Their λ max may redshift due to surface interactions, and their absorbance intensities can decrease with aggregation [25,26]. However, the results in Figure 2, describing the effect of NaCl on silver nanoparticles stabilized by various concentrations of PVP, cannot be explained by the above-mentioned phenomena.…”

Section: Chemical Stability Analysismentioning

confidence: 82%

Polyvinyl-Pyrrolidone-Coated Silver Nanoparticles—The Colloidal, Chemical, and Biological Consequences of Steric Stabilization under Biorelevant Conditions

Rónavári

Bélteky

Boka

et al. 2021

IJMS

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(1) Background: Several properties of silver nanoparticles (AgNPs), such as cytotoxic, anticancer, and antimicrobial activities, have been subjects of intense research; however, important aspects such as nanoparticle aggregation are generally neglected, although a decline in colloidal stability leads to a loss of the desired biological activities. Colloidal stability is affected by pH, ionic strength, or a plethora of biomolecules that interact with AgNPs under biorelevant conditions. (2) Methods: As only a few studies have focused on the relationship between aggregation behavior and the biological properties of AgNPs, here, we have systematically evaluated this issue by completing a thorough analysis of sterically (via polyvinyl-pyrrolidone (PVP)) stabilized AgNPs that were subjected to different circumstances. We assessed ultraviolet–visible light absorption, dynamic light scattering, zeta potential measurements, in vitro cell viability, and microdilution assays to screen both colloidal stability as well as bioactivity. (3) Results: The results revealed that although PVP provided outstanding biorelevant colloidal stability, the chemical stability of AgNPs could not be maintained completely with this capping material. (4) Conclusion: These unexpected findings led to the realization that stabilizing materials have more profound importance in association with biorelevant applications of nanomaterials than just being simple colloidal stabilizers.

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Section: Chemical Stability Analysismentioning

confidence: 82%

Polyvinyl-Pyrrolidone-Coated Silver Nanoparticles—The Colloidal, Chemical, and Biological Consequences of Steric Stabilization under Biorelevant Conditions

Rónavári

Bélteky

Boka

et al. 2021

IJMS

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“…In addition, for both types of plant extracts activated either by FLC-dc-APGD or FLA-dc-APGD, the increase in the absorbance values was observed. As was suggested by Badi’ah et al [ 49 ], this increase was likely related to the growth of NPs and connected to the enhanced efficiency of the AuNPs synthesis as compared to the untreated aqueous plant extract.…”

Section: Resultsmentioning

confidence: 57%

Plant Extracts Activated by Cold Atmospheric Pressure Plasmas as Suitable Tools for Synthesis of Gold Nanostructures with Catalytic Uses

et al. 2020

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Because cold atmospheric pressure plasma (CAPP)-based technologies are very useful tools in nanomaterials synthesis, in this work we have connected two unique in their classes approaches—a CAPP-based protocol and a green synthesis method in order to obtain stable-in-time gold nanoparticles (AuNPs). To do so, we have used an aqueous Gingko biloba leave extract and an aqueous Panax ginseng root extract (untreated or treated by CAPP) to produce AuNPs, suitable for catalytical uses. Firstly, we have adjusted the optical properties of resulted AuNPs, applying UV/Vis absorption spectrophotometry (UV/Vis). To reveal the morphology of Au nanostructures, transmission electron microscopy (TEM) in addition to energy dispersive X-ray scattering (EDX) and selected area X-ray diffraction (SAED) was utilized. Moreover, optical emission spectrometry (OES) in addition to a colorimetric method was used to identify and determine the concentration of selected RONS occurring at the liquid-CAPP interface. Additionally, attenuated total reflectance Fourier transform-infrared spectroscopy (ATR FT-IR) was applied to reveal the active compounds, which might be responsible for the AuNPs surface functionalization and stabilization. Within the performed research it was found that the smallest in size AuNPs were synthesized using the aqueous P. ginseng root extract, which was activated by direct current atmospheric pressure glow discharge (dc-APGD), generated in contact with a flowing liquid cathode (FLC). On the contrary, taking into account the aqueous G. biloba leave extract, the smallest in size AuNPs were synthesized when the untreated by CAPP aqueous G. biloba leave extract was involved in the Au nanostructures synthesis. For catalytical studies we have chosen AuNPs produced using the aqueous P. ginseng root extract activated by FLC-dc-APGD as well as AuNPs synthesized using the aqueous G. biloba leave extract also activated by FLC-dc-APGD. Those NPs were successfully used as homogenous catalysts for the reduction of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP).

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“…From the inset of Figure 2 a, it could be seen that the as-prepared silver nanospheres exhibit rough surfaces and are aggregated to form larger particles, which is further confirmed from the gray color of nanoparticles. 44 Energy-dispersive X-ray analysis (EDAX) was also carried out to identify the elements present in the as-prepared Ala–Ag NPs. In Figure 2 b, the EDAX spectrum confirms the formation of AgNPs by displaying a strong signal in the region of silver.…”

Section: Resultsmentioning

confidence: 99%

Multifunctional Efficacy of Environmentally Benign Silver Nanospheres for Organic Transformation, Photocatalysis, and Water Remediation

et al. 2020

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Highly crystalline and monophasic silver nanospheres with a high specific surface area of 57 m 2 /g have been synthesized by an environmentally benign rapid chemical reduction using l -alanine for catalytic transformation, photocatalytic degradation, and bacterial disinfection, which can provide an ample strategy for water remediation. Electron microscopic analysis confirms the spherical morphology of as-prepared silver nanoparticles with an average grain size of 20 nm. Silver nanospheres showed excellent catalytic activity for the catalytic hydrogenation and conversion (95.6%) of 4-nitrophenol to 4-aminophenol. Significant photocatalytic degradation proficiency was also shown for methylene blue (94.5%) and rhodamine B (96.3%) dyes under solar irradiation. The antibacterial behavior of Ala–Ag nanospheres was demonstrated through the disk diffusion antibacterial assay against Gram-positive ( Escherichia coli ) and Gram-negative ( Staphylococcus aureus ) bacteria. Multifunctional efficiency of as-prepared Ala–Ag nanospheres for water remediation has also been established.

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Synthesis of Silver Nanoparticles and the Development in Analysis Method

Cited by 54 publications

References 11 publications

Polyvinyl-Pyrrolidone-Coated Silver Nanoparticles—The Colloidal, Chemical, and Biological Consequences of Steric Stabilization under Biorelevant Conditions

Polyvinyl-Pyrrolidone-Coated Silver Nanoparticles—The Colloidal, Chemical, and Biological Consequences of Steric Stabilization under Biorelevant Conditions

Plant Extracts Activated by Cold Atmospheric Pressure Plasmas as Suitable Tools for Synthesis of Gold Nanostructures with Catalytic Uses

Multifunctional Efficacy of Environmentally Benign Silver Nanospheres for Organic Transformation, Photocatalysis, and Water Remediation

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