scholarly journals An in situ SAXS investigation of the formation of silver nanoparticles and bimetallic silver–gold nanoparticles in controlled wet-chemical reduction synthesis

2020 ◽  
Vol 2 (1) ◽  
pp. 225-238 ◽  
Author(s):  
Paulo R. A. F. Garcia ◽  
Oleg Prymak ◽  
Viktoria Grasmik ◽  
Kevin Pappert ◽  
Wagner Wlysses ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Online Monitoring ◽  
Chemical Reduction ◽  
Structural Parameters ◽  
Nanoparticle Synthesis ◽  
Small Particles ◽  
Metallic Nanoparticle ◽  
Wet Chemical

In situ investigation of metallic nanoparticle synthesis with an online monitoring of the system by SAXS. Determination of structural parameters and growth processes. Ag-NP synthesis presented a bimodal system with the presence of small particles (∼3 nm).

scholarly journals In Situ Investigation of the Formation Kinematics of Plasma-Generated Silver Nanoparticles

Nanomaterials ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 555 ◽  
Author(s):  
Daniel Tasche ◽  
Mirco Weber ◽  
Julia Mrotzek ◽  
Christoph Gerhard ◽  
Stephan Wieneke ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Atmospheric Pressure ◽  
Nanoparticle Synthesis ◽  
Atmospheric Pressure Plasma ◽  
Spherical Particles ◽  
Synthesis Process ◽  
Plasma Exposure ◽  
Pressure Plasma ◽  
In Situ Investigation

In this publication, it is shown how to synthesize silver nanoparticles from silver cations out of aqueous solutions by the use of an atmospheric pressure plasma source. The use of an atmospheric pressure plasma leads to a very fast reduction of silver ions in extensive solvent volumes. In order to investigate the nanoparticle synthesis process, ultraviolet/visible (UV/VIS) absorption spectra were recorded in situ. By using transmission electron microscopy and by the analysis of UV/VIS spectra, the kinetics of silver nanoparticle formation by plasma influence can be seen in more detail. For example, there are two different sections visible in the synthesis during the plasma exposure process. The first section of the synthesis is characterized by a linear formation of small spherical particles of nearly constant size. The second section is predominated by saturation effects. Here, particle faults are increasingly formed, induced by changes in the particle shape and the fusion of those particles. The plasma exposure time, therefore, determines the shape and size distribution of the nanoparticles.

scholarly journals Green and Rapid Synthesis of Anticancerous Silver Nanoparticles bySaccharomyces boulardiiand Insight into Mechanism of Nanoparticle Synthesis

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Abhishek Kaler ◽  
Sanyog Jain ◽  
Uttam Chand Banerjee
Keyword(s):  
Silver Nanoparticles ◽  
Reaction Time ◽  
Cell Mass ◽  
Nanoparticle Synthesis ◽  
Silver Ions ◽  
Saccharomyces Boulardii ◽  
Breast Cancer Cell Lines ◽  
X Rays ◽  
Metallic Nanoparticle ◽  
Vis Spectroscopy

Rapidly developing field of nanobiotechnology dealing with metallic nanoparticle (MNP) synthesis is primarily lacking control over size, shape, dispersity, yield, and reaction time. Present work describes an ecofriendly method for the synthesis of silver nanoparticles (AgNPs) by cell free extract (CFE) ofSaccharomyces boulardii. Parameters such as culture age (stationary phase growth), cell mass concentration (400 mg/mL), temperature (35°C), and reaction time (4 h), have been optimized to exercise a control over the yield of nanoparticles and their properties. Nanoparticle (NP) formation was confirmed by UV-Vis spectroscopy, elemental composition by EDX (energy dispersive X-rays) analysis, and size and shape by transmission electron microscopy. Synthesized nanoparticles had the size range of 3–10 nm with high negative zeta potential (−31 mV) indicating excellent stability. Role of proteins/peptides in NP formation and their stability were also elucidated. Finally, anticancer activity of silver nanoparticles as compared to silver ions was determined on breast cancer cell lines.

Nylon-Supported Plasmonic Assay Based on the Aggregation of Silver Nanoparticles: In Situ Determination of Hydrogen Sulfide-like Compounds in Breath Samples as a Proof of Concept

ACS Sensors ◽  
2019 ◽  
Vol 4 (8) ◽  
pp. 2164-2172 ◽  
Author(s):  
Neus Jornet-Martínez ◽  
Lusine Hakobyan ◽  
Ana Isabel Argente-García ◽  
Carmen Molins-Legua ◽  
Pilar Campíns-Falcó
Keyword(s):  
Silver Nanoparticles ◽  
Hydrogen Sulfide ◽  
Proof Of Concept ◽  
Plasmonic Assay

Determination of mechanical properties of artificial turf football pitches according to structural components

2017 ◽  
Vol 232 (2) ◽  
pp. 131-139 ◽  
Author(s):  
Javier Sánchez-Sánchez ◽  
Pascal Haxaire ◽  
Jorge García Unanue ◽  
José L Felipe ◽  
Ana M Gallardo ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Structural Parameters ◽  
Base Material ◽  
Structural Components ◽  
Artificial Turf ◽  
Force Reduction ◽  
Pile Length ◽  
Selection Of

Structural components of artificial turf football pitches have been improved in the last decade. The aim of this study was to explore the influence of structural components on the in situ mechanical behaviour of third-generation artificial turf football pitches. In total, 21 pitches were analysed according to the specified FIFA procedures. The results revealed that each of the pitches complies with the requirements of FIFA regulations. Pile length sample, stabilising bulk density, tuft/m2 and sub-base material all demonstrated a significant influence on the mechanical properties of the surface ( p < 0.05). Finally, the selected structural parameters explained 77.9%, 59.8% and 54.3% of variance in rotational traction, vertical deformation and force reduction, respectively. These results show the importance of the selection of the structural components in the design of artificial turf football pitches.

scholarly journals In Situ Functionalization of Silver Nanoparticles by Gallic Acid as a Colorimetric Sensor for Simple Sensitive Determination of Melamine in Milk

ACS Omega ◽  
2021 ◽  
Vol 6 (36) ◽  
pp. 23630-23635
Author(s):  
Xuexia Liu ◽  
Juan Wang ◽  
Yinfeng Wang ◽  
Chunfang Huang ◽  
Zhijun Wang ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Gallic Acid ◽  
Colorimetric Sensor ◽  
Sensitive Determination ◽  
In Situ Functionalization

scholarly journals Anchoring silver nanoparticles on imidazolium-based poly(ionic liquid)s with engineered nanopores as an efficient carrier for anticancer drug controlled delivery with antimicrobial effect

2022 ◽  
Author(s):  
Ehsan Aliakbari ◽  
Reza Eghdam Zamiri ◽  
Mehri Mahdavi ◽  
Vahid Yousefi
Keyword(s):  
Drug Delivery ◽  
Silver Nanoparticles ◽  
Ionic Liquid ◽  
Antimicrobial Effect ◽  
Antibacterial Activities ◽  
E Coli ◽  
Ft Ir ◽  
Poly Ionic Liquid

Abstract Due to the significance of drug delivery, the design of novel progressive nanomaterials for targeting drug delivery is a significant role in pharmacotherapy, as this method is supposed to reach a more exact target. One of the most distinguished materials by researchers is the poly ionic liquid (PIL), which have been used as anticancer drugs carriers and notably improve the antitumor effect and half-life. In this work, an efficient and stable nanocarrier containing silver nanoparticle, which were well distributed throughout the ionic liquid-based copolymer network (PILP-Ag), was reported for the drug delivery with antimicrobial effect. PILP was synthesized by radical silver nanoparticles was anchored into PIL voids by in-situ reduction, which enrich the adsorption capability of drug and antimicrobial effect of the nanocarrier. The synthesized nanomaterials were characterized by various techniques such as BET, TGA, SEM, TEM, AAS and FT-IR spectroscopy. The antibacterial activities of the silver-containing PIL against both S. aureus and E. coli were studied by determination of the minimum inhibitory concentration and Minimum Bactericidal Concentration.

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