scholarly journals Acute hepatotoxicity and drug/chemical interaction toxicity of 10-nm silver nanoparticles in mice

2019 ◽  
Vol 6 (2) ◽  
pp. 37-44
Author(s):  
Katsuhiro Isoda ◽  
Naoki Kobayashi ◽  
Yuichiro Taira ◽  
Ikuko Taira ◽  
Yoshimi Shimizu ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Chemical Interaction

Silver nanoparticles linked by a Pt-containing organometallic dithiol bridge: study of local structure and interface by XAFS and SR-XPS

2014 ◽  
Vol 16 (23) ◽  
pp. 11719-11728 ◽  
Author(s):  
C. Battocchio ◽  
I. Fratoddi ◽  
L. Fontana ◽  
E. Bodo ◽  
F. Porcaro ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Local Structure ◽  
Chemical Interaction

Silver nanoparticles (AgNPs) functionalized with an organometallic bifunctional thiol, leading to 2D networks, were investigated by SR-XPS and XAFS with the aim to probe the nature of the chemical interaction between the ligand and Ag atoms on the NPs surface.

scholarly journals SILVER NANOPARTICLES AND COCONUT OIL INCORPORATED BIOPOLYMER BASED ELECTROSPUN NANOFIBERS FOR WOUND DRESSING

2021 ◽  
pp. 204-209
Author(s):  
SUBHASHREE SAHOO ◽  
JOGABRATA TRIPATHY ◽  
AFRASIM MOIN ◽  
MEENAKSHI S. ◽  
SIDDARAMAIAH ◽  
...  
Keyword(s):  
Wound Healing ◽  
Silver Nanoparticles ◽  
Chemical Interaction ◽  
Coconut Oil ◽  
Electrospun Nanofibers ◽  
Reduced Form ◽  
Ag Nps ◽  
Disk Diffusion Assay ◽  
Zones Of Inhibition ◽  
Oil Concentration

Objective: The main aim of this study was to develop and evaluate the nanofiber loaded with coconut oil and silver nanoparticles (Ag NPs) for the treatment of wound healing by the electrospun method. Methods: The nanofibers have been created using the reduced form of silver nanoparticles and coconut oil along with Eudragit L-100 by the electrospun method. The presence of coconut oil and chemical interaction was determined by the FTIR method. XRD was made to evaluate the crystalline nature of AgNPs and Eudragit L-100. TEM was carried out to show the presence of AgNPs on the surface of nanofibers and SEM represents the diameter of the fiber. The antibacterial activity of nanofibers was carried out using a disk diffusion assay. Results: The diameter of the fibers was diminished by the excess of AgNPs in the fibers, while it increases by the coconut oil concentration, enhancing the nanofiber's hydrophilicity. FTIR spectroscopy was found in the range of coconut oil at 3553 cm-1for O-H stretch, 1365 cm-1, and 1240 cm-1 for the C-O stretch of ester groups. The diffraction peaks at 2θ of 38.5°, 44.6°, and 64.7°, in the XRD spectra of nanofiber, changed with silver NP affirming the total decrease of Ag salt. The bactericidal activity has been carried out between Escherichia coli and Staphylococcus aureus showing zones of inhibition of 20.0±0.2 mm and 14.8±0.4 mm, exhibiting excellent bactericidal characteristics for wound healing. Conclusion: The formulated nanofibers were obtained to offer protection against external agents and help in the regeneration of new tissue.

Understanding chemical interaction between phosphonate-derivative molecules and a silver surface cluster in SERS: a combined experimental and computational approach

2019 ◽  
Vol 21 (40) ◽  
pp. 22180-22187 ◽  
Author(s):  
Gauthier Emonds-Alt ◽  
Benoit Mignolet ◽  
Cedric Malherbe ◽  
Jean-Christophe M. Monbaliu ◽  
Francoise Remacle ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Chemical Interaction ◽  
Computational Approach ◽  
Silver Surface ◽  
Surface Cluster ◽  
Adsorption Mode

This joint experimental-theoretical SERS study provides new insights on the adsorption mode of phosphonate-derivative molecules on silver nanoparticles.

scholarly journals Formation of silver nanoparticles on lignin and two of its precursors

Les/Wood ◽  
2021 ◽  
Vol 70 (1) ◽  
Author(s):  
Sebastian Dahle ◽  
Lienhard Wegewitz ◽  
Wolfgang Viöl ◽  
Wolfgang Maus-Friedrichs
Keyword(s):  
Silver Nanoparticles ◽  
Photoelectron Spectroscopy ◽  
Organic Molecules ◽  
Chemical Interaction ◽  
Catalytic Decomposition ◽  
Organic Substrate ◽  
X Ray ◽  
Force Microscopy ◽  
Atomic Force ◽  
Adsorbed Silver

Metastable Induced Electron Spectroscopy, Ultraviolet Photoelectron Spectroscopy (He I and He II), X-ray Photoelectron Spectroscopy, and Atomic Force Microscopy were employed to study the interaction of silver with lignin as well as with two of its natural precursors, coniferyl alcohol and sinapyl alcohol. For all three of them, no chemical interaction between the adsorbed silver and the organic substrate was found before contact with air. Nevertheless, silver nanoparticles were found in all three cases after contact with air. Thus, a process of silver nanoparticle formation during the decomposition of the organic molecules is suggested, similar to the previously found catalytic decomposition of cinnamyl alcohol by water in the presence of silver atoms.

Synthesis, performance and growth mechanism of silver nanoparticle coated SERS fiber probe

2019 ◽  
Vol 107 (3) ◽  
pp. 305
Author(s):  
Mengmei Geng ◽  
Yuting Long ◽  
Tongqing Liu ◽  
Zijuan Du ◽  
Hong Li ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Absorption Spectrum ◽  
Reaction Time ◽  
Growth Mechanism ◽  
Fiber Optic ◽  
Fiber Optic Probe ◽  
Visible Absorption ◽  
Fiber Probe ◽  
Surface Enhanced Raman ◽  
Optic Probe

Surface-enhanced Raman Scattering (SERS) fiber probe provides abundant interaction area between light and materials, permits detection within limited space and is especially useful for remote or in situ detection. A silver decorated SERS fiber optic probe was prepared by hydrothermal method. This method manages to accomplish the growth of silver nanoparticles and its adherence on fiber optic tip within one step, simplifying the synthetic procedure. The effects of reaction time on phase composition, surface plasmon resonance property and morphology were investigated by X-ray diffraction analysis (XRD), ultraviolet-visible absorption spectrum (UV-VIS absorption spectrum) and scanning electron microscope (SEM). The results showed that when reaction time is prolonged from 4–8 hours at 180 °C, crystals size and size distribution of silver nanoparticles increase. Furthermore, the morphology, crystal size and distribution density of silver nanoparticles evolve along with reaction time. A growth mechanism based on two factors, equilibrium between nucleation and growth, and the existence of PVP, is hypothesized. The SERS fiber probe can detect rhodamin 6G (R6G) at the concentration of 10−6 M. This SERS fiber probe exhibits promising potential in organic dye and pesticide residue detection.

The Effect of Silver Nanoparticles on Blood Cells in Rats

2012 ◽  
Vol 1 (1) ◽  
Author(s):  
S. Rezaei-Zarchi ◽  
M. Taghavi-Foumani ◽  
S. Razavi Sheshdeh ◽  
M. Negahdary ◽  
G. Rahimi
Keyword(s):  
Silver Nanoparticles ◽  
Blood Cells
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