Optical properties of functional composite silver nanoparticles and their potential use in reproductive medicine

2013 ◽  
Author(s):  
Vasyl J. Syrvatka ◽  
Yurij I. Slyvchuk ◽  
Ivan I. Rozgoni ◽  
Ivan I. Gevkan ◽  
Oleksandr I. Bilyy
Keyword(s):  
Silver Nanoparticles ◽  
Optical Properties ◽  
Reproductive Medicine ◽  
Functional Composite ◽  
Potential Use

Optical Properties of Sputtered Silver Granular Films

2005 ◽  
Vol 480-481 ◽  
pp. 287-292 ◽  
Author(s):  
S.E. Paje ◽  
F. Teran ◽  
J.M. Riveiro ◽  
J. Llopis ◽  
M.A. García ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Optical Properties ◽  
Optical Absorption ◽  
Surface Morphology ◽  
Silver Clusters ◽  
Plasmon Excitation ◽  
Granular Films ◽  
Silver Films ◽  
Atomic Force ◽  
Atomic Force Micrographs

In this research we study optical absorption and morphology of silver films prepared with a sputtering method. Silver granular films are obtained on a glass substrate for films with thickness smaller than about 60 Å. Superficial silver clusters of around 100 nm in diameter are clearly seen in the atomic force micrographs. The absorption of these samples are characterized by plasmon excitation in the 450-650 nm spectral range, which differs from the known excitation of silver nanoparticles fabricated by different techniques. The optical absorption of silver granular films depend on sputtering conditions like substrate temperature or deposition rate and correlates with the surface morphology.

scholarly journals Biosynthesis of Silver Nanoparticles Mediated by Entomopathogenic Fungi: Antimicrobial Resistance, Nanopesticides, and Toxicity

Antibiotics ◽  
2021 ◽  
Vol 10 (7) ◽  
pp. 852
Author(s):  
Tárcio S. Santos ◽  
Tarcisio M. Silva ◽  
Juliana C. Cardoso ◽  
Ricardo L. C. de Albuquerque-Júnior ◽  
Aleksandra Zielinska ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Filamentous Fungi ◽  
Entomopathogenic Fungi ◽  
Antimicrobial Agents ◽  
Insect Pests ◽  
Insect Control ◽  
Biological Synthesis ◽  
Biological Methods ◽  
Potential Use

Silver nanoparticles are widely used in the biomedical and agri-food fields due to their versatility. The use of biological methods for the synthesis of silver nanoparticles has increased considerably due to their feasibility and high biocompatibility. In general, microorganisms have been widely explored for the production of silver nanoparticles for several applications. The objective of this work was to evaluate the use of entomopathogenic fungi for the biological synthesis of silver nanoparticles, in comparison to the use of other filamentous fungi, and the possibility of using these nanoparticles as antimicrobial agents and for the control of insect pests. In addition, the in vitro methods commonly used to assess the toxicity of these materials are discussed. Several species of filamentous fungi are known to have the ability to form silver nanoparticles, but few studies have been conducted on the potential of entomopathogenic fungi to produce these materials. The investigation of the toxicity of silver nanoparticles is usually carried out in vitro through cytotoxicity/genotoxicity analyses, using well-established methodologies, such as MTT and comet assays, respectively. The use of silver nanoparticles obtained through entomopathogenic fungi against insects is mainly focused on mosquitoes that transmit diseases to humans, with satisfactory results regarding mortality estimates. Entomopathogenic fungi can be employed in the synthesis of silver nanoparticles for potential use in insect control, but there is a need to expand studies on toxicity so to enable their use also in insect control in agriculture.

Synthesis of silver nanoparticles in a polyvinylpyrrolidone (PVP) paste, and their optical properties in a film and in ethylene glycol

2008 ◽  
Vol 43 (1) ◽  
pp. 90-96 ◽  
Author(s):  
A. Slistan-Grijalva ◽  
R. Herrera-Urbina ◽  
J.F. Rivas-Silva ◽  
M. Ávalos-Borja ◽  
F.F. Castillón-Barraza ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Optical Properties ◽  
Ethylene Glycol

Self-assembled silver nanoparticles for plasmon-enhanced solar cell back reflectors: correlation between structural and optical properties

2013 ◽  
Vol 24 (26) ◽  
pp. 265601 ◽  
Author(s):  
Seweryn Morawiec ◽  
Manuel J Mendes ◽  
Salvatore Mirabella ◽  
Francesca Simone ◽  
Francesco Priolo ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Optical Properties ◽  
Solar Cell ◽  
Structural And Optical Properties ◽  
Back Reflectors ◽  
Self Assembled

Preparation and optical properties of silver nanoparticles in R-phycoerythrin, a protein matrix

2008 ◽  
Vol 44 (8) ◽  
pp. 835-841 ◽  
Author(s):  
O. D. Bekasova ◽  
A. A. Brekhovskikh ◽  
A. A. Revina ◽  
V. T. Dubinchuk
Keyword(s):  
Silver Nanoparticles ◽  
Optical Properties ◽  
Protein Matrix

scholarly journals Preparation and application of various nanoparticles in biology and medicine

2013 ◽  
Vol 3 (1) ◽  
pp. 2 ◽  
Author(s):  
Vardan Gasparyan
Keyword(s):  
Magnetic Resonance Imaging ◽  
Drug Delivery ◽  
Silver Nanoparticles ◽  
Optical Properties ◽  
Mri Contrast Agents ◽  
Resonance Imaging ◽  
Gold And Silver Nanoparticles ◽  
Mri Contrast ◽  
Cellular Processes ◽  
Magnetic Resonance Imaging Mri

The present paper considers prospects for application of various nanoparticles in biology and medicine. Here are presented data on preparation of gold and silver nanoparticles, and effects of shape of these nanoparticles on their optical properties. Application of these nanoparticles in diagnostics, for drug delivery and therapy, and preparation of magnetic nanoparticles from iron and cobalt salts are also discussed. Application of these nanoparticles as magnetic resonance imaging (MRI) contrast agents and as vehicles for drug delivery, and preparation of quantum dots and their application as prospective nanoparticles for multiplex analysis and for visualization of cellular processes will be tackled. Finally, prospects for new types of nanocomposites (metallic nano-shells) will be not overlooked.

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