Gamma Radiation Synthesis of Colloidal Silver Nanoparticles

Lungulescu, Eduard-Marius; Sbarcea, G.; Setnescu, Radu; Nicula, Nicoleta; Ducu, Robert; Lupu, Ana Maria; Ion, Ioana; Marinescu, Virgil

doi:10.37358/rc.19.8.7436

Cited by 14 publications

(18 citation statements)

References 27 publications

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“…The absorption peak of 350 nm corresponds to the presence of Ag in the form of NWs. These results confirm the presence of silver with excellent aspects [31,32] As the number of layers increases, an increase in absorption peaks and a decrease in transmittance occur. This proves the statement of Skoog and Leary that transmittance and absorbance are inversely proportional [28].…”

Section: Resultssupporting

confidence: 75%

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Conductive Layers Based on Silver Nanowires by Spray Coating Process

Junaidi¹,

Asriyani²,

Sembiring³

et al. 2020

Rev. Chim.

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In this research, a thin film of silver nanowires (AgNWs) is made by varying the number of layers onto a polycarbonate substrate using a spray coating process. AgNWs were obtained via the polyol method using silver nitrate (AgNO3) as rare materials, Polyvinyl pyrrolidone (PVP) as a reducing agent and ethylene glycol (EG) as a solvent. The coating material used is AgNWs solution with a concentration of 10% in ethanol, which has a diameter and length of 176.13 nm and 28.58 �m, respectively. The optical conductivity for third layers were 1.80 � 105 S.m−1,1.98 � 105 S.m−1, and 2.32 � 105 S.m−1 by the gap energy of 3.84 eV, 3.81 eV, and 3.79 eV at a wavelength of 550 nm. The greater the number of layers, the higher the optical conductivity. The smaller energy gap indicates that the material absorbs more energy, so the absorbance value is higher. The sheet resistance of AgNWs thin films in variations of each layer was 119.2 Ω.sq−1, 20.6 Ω.sq−1 and 4.98 Ω.sq−1. The lower the layer resistance, the higher the density of AgNWs and the thicker the layer. Based on the SEM images by cross-section technique, the thickness of AgNWs thin films obtained by 44.244 μm, 69.126 μm, and 100.028 μm for each layer. AgNWs thin films could be used as transparent conductive electrodes for optoelectronic applications.

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Section: Resultssupporting

confidence: 75%

“…The absorbance peak around 350 nm indicates the presence of Ag in the form of NWs. The absence of absorption peaks around 410 nm indicates that there is no silver element [31,32].…”

Section: Resultsmentioning

confidence: 99%

Conductive Layers Based on Silver Nanowires by Spray Coating Process

Junaidi¹,

Asriyani²,

Sembiring³

et al. 2020

Rev. Chim.

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“…In contrast with the conventional methods, the radiochemical synthesis takes place in one-step and under mild conditions of temperature and pressure, leading to well dispersed systems with narrow particle size distribution and does not involve the use of chemical toxic reduction agents nor waste release, being considered an eco-friendly method of synthesis. The dimensional control of nanoparticles can be achieved by varying a small number of synthesis parameters, especially by controlling the irradiation dose [12,13].…”

Section: Introductionmentioning

confidence: 99%

“…On the other side, the hydroxyl radicals (OH•) present an oxidant character and can oxidize Silver ions or atoms to higher oxidation states [15]. To prevent this effect, scavengers such as secondary or tertiary alcohols should be used [11][12][13]16].…”

Section: Introductionmentioning

confidence: 99%

“…Nanoparticle agglomeration of radiochemically synthesized nanoparticles is avoided by different socalled stabilizing agents, such as polyvinyl alcohol (PVA) [13,16,18], polyvinylpyrrolidone (PVP) [11], gelatine [19], chitosan [20,21], a.s.o. These polymers can create fine coatings onto the particles resulting in a repulsive sterical force which keeps the nanoparticles away from each other -sterical stabilization [22,23].…”

Section: Introductionmentioning

confidence: 99%

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Gamma Radiation Synthesis of Silver Nanoparticles/Chitosan composites with antimicrobial properties

Lungulescu¹,

Setnescu²,

Nicula³

et al. 2021

Mater. Plast.

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Composites of Silver nanoparticles/chitosan were obtained in aqueous solution, in-one step and eco-friendly synthesis, under ambiental conditions, using gamma irradiation. The radiochemical synthesis enabled obtaining of controlled size, monodisperse and high stability Silver nanoparticles. The obtained composites presented UV-Vis surface plasmon resonance comprised between 406-414 nm, depending on composition of the reactant system, spherical shape and narrow particle size distributions, with mean dimensions between 3-55 nm, and good antibacterial properties proven against Staphylococcus aureus and Escherichia coli. The influence of the Silver ions/chitosan ratio and of the pH of the initial solution on the final Ag Np properties is also discussed.

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Unraveling the mysteries of silver nanoparticles: synthesis, characterization, antimicrobial effects and uptake translocation in plant—a review

Fares,

Mahdy,

Ahmed

2024

Planta

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Main conclusion The study thoroughly investigates nanosilver production, properties, and interactions, shedding light on its multifaceted applications. It underscores the importance of characterizing nanosilver for predicting its behavior in complex environments. Particularly, it highlights the agricultural and environmental ramifications of nanosilver uptake by plants. Abstract Nowadays, silver nanoparticles (AgNPs) are a very adaptable nanomaterial with many uses, particularly in antibacterial treatments and agricultural operations. Clarification of key elements of nanosilver, such as its synthesis and characterization procedures, antibacterial activity, and intricate interactions with plants, particularly those pertaining to uptake and translocation mechanisms, is the aim of this in-depth investigation. Nanosilver synthesis is a multifaceted process that includes a range of methodologies, including chemical, biological, and sustainable approaches that are also environmentally benign. This section provides a critical evaluation of these methods, considering their impacts on repeatability, scalability, and environmental impact. The physicochemical properties of nanosilver were determined by means of characterization procedures. This review highlights the significance of analytical approaches such as spectroscopy, microscopy, and other state-of the-art methods for fully characterizing nanosilver particles. Although grasp of these properties is necessary in order to predict the behavior and potential impacts of nanosilver in complex biological and environmental systems. The second half of this article delves into the intricate interactions that plants have with nanosilver, emphasizing the mechanisms of absorption and translocation. There are significant ramifications for agricultural and environmental problems from the uptake of nanosilver by plants and its subsequent passage through their tissues. In summary, by summarizing the state-of-the-art information in this field, this study offers a comprehensive overview of the production, characterization, antibacterial capabilities, and interactions of nanosilver with plants. This paper contributes to the ongoing conversation in nanotechnology. Graphical abstract

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Gamma Radiation Synthesis of Colloidal Silver Nanoparticles

Cited by 14 publications

References 27 publications

Conductive Layers Based on Silver Nanowires by Spray Coating Process

Conductive Layers Based on Silver Nanowires by Spray Coating Process

Gamma Radiation Synthesis of Silver Nanoparticles/Chitosan composites with antimicrobial properties

Unraveling the mysteries of silver nanoparticles: synthesis, characterization, antimicrobial effects and uptake translocation in plant—a review

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