An unexpected surfactant role of immiscible nitrogen in the structural development of silver nanoparticles: an experimental and numerical investigation

Nanoscale ◽  
2020 ◽  
Vol 12 (3) ◽  
pp. 1749-1758 ◽  
Author(s):  
Jungheum Yun ◽  
Hee-Suk Chung ◽  
Sang-Geul Lee ◽  
Jong-Seong Bae ◽  
Tae Eun Hong ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Numerical Investigation ◽  
Ag Nanoparticles ◽  
Sputter Deposition ◽  
Structural Development ◽  
Free Energies ◽  
Crystalline Orientation ◽  
Oxide Substrates

N-Surfactant-facilitated sputter deposition provides strong selectivity for crystalline orientation and facets due to drastic decreases in the surface free energies of Ag nanoparticles supported on oxide substrates.

Supports matter: unraveling the role of charge transfer in the plasmonic catalytic activity of silver nanoparticles

2017 ◽  
Vol 5 (23) ◽  
pp. 11720-11729 ◽  
Author(s):  
Letizia Papa ◽  
Isabel C. de Freitas ◽  
Rafael S. Geonmonond ◽  
Caroline B. de Aquino ◽  
Joana C. Pieretti ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Catalytic Activity ◽  
Charge Transfer ◽  
Ag Nanoparticles ◽  
Catalytic Activities

This paper unravels the role played by charge transfer to and from Ag nanoparticles in their plasmonic catalytic activities.

scholarly journals Growth of Ag-Nanoparticles: Shape-Directing Role of Silver Ions and Stabilizer in Aqueous Solutions

2010 ◽  
Vol 6 (3) ◽  
pp. 1049-1058
Author(s):  
Zoya Zaheer ◽  
Rafiuddin Rafiuddin
Keyword(s):  
Silver Nanoparticles ◽  
Optical Properties ◽  
Ag Nanoparticles ◽  
Cetyltrimethylammonium Bromide ◽  
Silver Ions ◽  
Average Diameter ◽  
Capping Agent ◽  
Transmission Electron ◽  
Uv Visible

Silver nanoparticles were synthesized using Tulsi leaves extract as reducing as well as a capping agent to reduce the steps and parameters involved in the synthesis. The morphology, stability and optical properties of Ag-nanoparticles depend on reactants and stabilizer, cetyltrimethylammonium bromide (CTAB) concentrations. The silver nanoparticles were characterized by UV-visible spectrophotometer, and transmission electron microscope (TEM). Spherical morphology of the silver nanoparticles with an average diameter of  25 nm. Morphology changed markedly from spherical aggregated to highly polydispersed in presence of CTAB.

scholarly journals Magnetism and plasmonic performance of mesoscopic hollow ceria spheres decorated with silver nanoparticles

Nanoscale ◽  
2019 ◽  
Vol 11 (8) ◽  
pp. 3574-3582 ◽  
Author(s):  
Eric Nestor Tseng ◽  
Yin-Ting Hsiao ◽  
Yi-Che Chen ◽  
Shih-Yun Chen ◽  
Alexandre Gloter ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Silver Nanoparticles ◽  
Ag Nanoparticles ◽  
Hollow Spheres ◽  
Surface Enhanced Raman Spectroscopy ◽  
Surface Enhanced ◽  
Surface Enhanced Raman

We investigate the role of interfaces and surfaces in the magnetic and surface enhanced Raman spectroscopy (SERS) properties of CeO2 hollow spheres decorated with Ag nanoparticles (H-CeO2@Ag).

scholarly journals Laser-Driven Aggregation in Dextran–Graft–PNIPAM/Silver Nanoparticles Hybrid Nanosystem: Plasmonic Effects

2020 ◽  
Vol 65 (3) ◽  
pp. 254
Author(s):  
O. A. Yeshchenko ◽  
A. O. Bartenev ◽  
A. P. Naumenko ◽  
N. V. Kutsevol ◽  
Iu. I. Harahuts ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Ag Nanoparticles ◽  
Laser Wavelength ◽  
Solution Temperature ◽  
Optical Forces ◽  
Ag Nps ◽  
Induced Aggregation ◽  
Conformation Transition ◽  
Hybrid Nanosystem

The laser-induced aggregation in the thermosensitive dextran grafted-poly(N-isopropylacrylamide) copolymer/Ag nanoparticles (D–g–PNIPAM/AgNPs) hybrid nanosystem in water has been observed. The laser-induced plasmonic heating of Ag NPs causes the Lower Critical Solution Temperature (LCST) conformation transition in D–g–PNIPAM/AgNPs macromolecules which shrink during the transition. The shrinking decreases sharply the distance between the silver nanoparticles that launches the aggregation of Ag NPs and the appearance of plasmonic attractive optical forces acting between the nanoparticles. It has been shown that the approach of the laser wavelength to the surface plasmon resonance in Ag nanoparticles leads to a significant strengthening of the observed aggregation, which proves its plasmon nature. The laser-induced transformations in the D–g–PNIPAM/AgNPs nanosystem have been found to be essentially irreversible that differs principally them from the temperature-induced transformations. Such fundamental difference proves the crucial role of the optical forces arising due to the excitation of surface plasmons in Ag NPs.

Green synthesis of silver nanoparticles using sustainable resources and their use as antibacterial agents: A review

2020 ◽  
Vol 13 ◽  
Author(s):  
Kumari Jyoti ◽  
Punyasloka Pattnaik ◽  
Tej Singh
Keyword(s):  
Silver Nanoparticles ◽  
Plant Extracts ◽  
Metallic Nanoparticles ◽  
Cost Effective ◽  
Biological Properties ◽  
Metal Species ◽  
Sustainable Resources ◽  
Research Areas ◽  
Low Toxicity

Background:: Synthesis of metallic nanoparticles has attracted extensive vitality in numerous research areas such as drug delivery, biomedicine, catalysis etc. where continuous efforts are being made by scientists and engineers to investigate new dimensions for both technological and industrial advancements. Amongst numerous metallic nanoparticles, silver nanoparticle (AgNPs) is a novel metal species with low toxicity, higher stability and significant chemical, physical and biological properties. Methods:: In this, various methods for the fabrication of AgNPs are summarized. Importantly, we concentrated on the role of reducing agents of different plants parts, various working conditions such as AgNO3 concentration; ratio of AgNO3/extract; incubation time; centrifugal conditions, size and shapes. Results:: This study suggested that eco-friendly and non toxic biomolecules present in the extracts (e.g. leaf, stem and root) of plants are used as reducing and capping agents for silver nanoparticles fabrication. This method of fabrication of silver nanoparticles using plants extracts is comparatively cost-effective and simple. A silver salt is simply reduced by biomolecules present in the extracts of these plants. In this review, we have emphasized the synthesis and antibacterial potential of silver nanoparticles using various plant extracts. Conclusion:: Fabrication of silver nanoparticles using plant extracts have advantage over the other physical methods, as it is safe, eco-friendly and simple to use. Plants have huge potential for the fabrication of silver nanoparticles of wide potential of applications with desired shape and size.

Controlled synthesis of functional Ag, Ag–Au/Au–Ag nanoparticles and their Prussian blue nanocomposites for bioanalytical applications

RSC Advances ◽  
2015 ◽  
Vol 5 (61) ◽  
pp. 49671-49679 ◽  
Author(s):  
Prem. C. Pandey ◽  
Richa Singh ◽  
Yashashwa Pandey
Keyword(s):  
Prussian Blue ◽  
Ag Nanoparticles ◽  
Active Role ◽  
Reducing Agents ◽  
Controlled Synthesis ◽  
Bioanalytical Applications

A facile method for the synthesis of functional AgNPs and bimetallic Ag–Au/Au–Ag are reported, enabling the formation of nanocomposite with prussian blue in a crystalline framework for bioanalytical applications, showing the active role of organic reducing agents and 3-aminopropyltrimethoxysilane.

scholarly journals Corrigendum to “The role of silver nanoparticles in the reluctance of colisepticemia in broiler chickens”

2021 ◽  
pp. 100180
Author(s):  
M.H.H. Awaad ◽  
K.M. El. Moustafa ◽  
S.A. Zoulfakar ◽  
M.S. Elhalawany ◽  
F.F. Mohammed ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Broiler Chickens

Numerical investigation of the role of tubercles in augmenting the aerodynamic characteristics of S823 airfoil

2021 ◽  
Author(s):  
R. Supreeth ◽  
A. Arokkiaswamy ◽  
Anirudh Keshavan ◽  
Pradyumna R. Koushik ◽  
Pramod P. Kashyap ◽  
...  
Keyword(s):  
Numerical Investigation ◽  
Aerodynamic Characteristics

Shape and stability of silver nanoparticles and their dependence on the conditions of preparation.

2012 ◽  
Vol 1371 ◽  
Author(s):  
M.I. Hernández-Castillo ◽  
O. Zaca-Moran ◽  
P. Zaca-Moran ◽  
M. Rojas-López ◽  
V.L. Gayou ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Reaction Time ◽  
Ag Nanoparticles ◽  
Reduction Procedure ◽  
Visible Spectrophotometry ◽  
Logical Sequence ◽  
Uv Visible ◽  
Citrate Reduction ◽  
Shape And Size

ABSTRACTBy using the citrate reduction procedure we have synthesized Ag nanoparticles, applying several conditions of preparation, being after characterized by UV-visible spectrophotometry. Following a logical sequence, the starting experiment was realized varying the reaction time, after that it was varied the concentration of the reductor agent, and finally it was varied the volume of the reductor agent. According to this methodology, TEM measurements show that firstly we have nanostructures with different shape and size, whereas in the last part of the experiment we have Ag nanoparticles with homogeneous shape and size.

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