scholarly journals Microwave Synthesis of Silver Sulfide and Silver Nanoparticles: Light and Time Influence

ACS Omega ◽  
2020 ◽  
Vol 5 (22) ◽  
pp. 12877-12881
Author(s):  
David Magalhães Sousa ◽  
William Chiappim ◽  
Joaquim P. Leitão ◽  
João Carlos Lima ◽  
Isabel Ferreira
Keyword(s):  
Silver Nanoparticles ◽  
Microwave Synthesis ◽  
Silver Sulfide

Ligand-dependent Ag2S formation: changes in deposition of silver nanoparticles with sulfidation

2018 ◽  
Vol 5 (5) ◽  
pp. 1090-1095 ◽  
Author(s):  
Michael L. Nguyen ◽  
Joseph A. Murphy ◽  
Leigh C. Hamlet ◽  
Boris L. T. Lau
Keyword(s):  
Silver Nanoparticles ◽  
Silver Sulfide

The formation of silver sulfide on the surface of silver nanoparticles is ligand-dependent and is essential for their persistence after sulfidation.

Variable Frequency Microwave Synthesis of Silver Nanoparticles

2006 ◽  
Vol 8 (1) ◽  
pp. 117-124 ◽  
Author(s):  
Hongjin Jiang ◽  
Kyoung-sik Moon ◽  
Zhuqing Zhang ◽  
Suresh Pothukuchi ◽  
C. P. Wong
Keyword(s):  
Silver Nanoparticles ◽  
Microwave Synthesis ◽  
Variable Frequency

Microwave synthesis of a bimodal mixture of triangular plate and spheroidal silver nanoparticles

2015 ◽  
Vol 5 (2) ◽  
pp. 311-317 ◽  
Author(s):  
Anneliese E. Laskowski ◽  
Daniel A. Decato ◽  
Mitchel S. Strandwitz ◽  
Jennifer A. Dahl
Keyword(s):  
Silver Nanoparticles ◽  
Microwave Synthesis ◽  
Triangular Plate ◽  
Image Position

Abstract

scholarly journals Atmospheric Corrosion, Antibacterial Properties, and Toxicity of Silver Nanoparticles Synthesized by Two Different Routes

2020 ◽  
Vol 2020 ◽  
pp. 1-14
Author(s):  
I. DeAlba-Montero ◽  
Claudio A. Ruiz-Torres ◽  
Diana P. Portales-Pérez ◽  
Fidel Martínez-Gutierrez ◽  
Félix Echeverría ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Antibacterial Activity ◽  
Mononuclear Cells ◽  
Antibacterial Properties ◽  
Antimicrobial Properties ◽  
Size Control ◽  
Silver Sulfide ◽  
Atmospheric Conditions ◽  
Toxic Activity ◽  
Atmospheric Air

Silver nanoparticles (AgNPs) have been widely employed or incorporated into different materials in biological application, due to their antibacterial properties. Therefore, antimicrobial capacity and cytotoxicity have been highly studied. However, most of these reports do not consider the possible corrosion of the nanomaterials during their exposure to atmospheric conditions since AgNPs undergo a transformation when they come in contact with a particular environment. Derived from this, the functionality and properties of the nanoparticles could decrease noticeably. The most common silver corrosion process occurs by the interaction of AgNPs with sulfur species (H2S) present in the atmospheric air, forming a corrosion layer of silver sulfide around the AgNPs, thus inhibiting the release of the ions responsible for the antimicrobial activity. In this work, AgNPs were synthesized using two different methods: one of them was based on a plant extract (Brickellia cavanillesii), and the other one is the well-known method using sodium borohydride (NaBH4). Chemical stability, corrosion, antibacterial activity, and toxic activity were evaluated for both sets of prepared samples, before and after exposition to atmospheric air for three months. The structural characterization of the samples, in terms of crystallinity, chemical composition, and morphology, evidenced the formation of link structures with nanobridges of Ag2S for non- “green” AgNPs after the air exposition and the intact preservation of silver core for the “green” sample. The antibacterial activity showed a clear improvement in the antimicrobial properties of silver in relation to the “green” functionalization, particle size control, and size reduction, as well as the preservation of the properties after air exposition by the effective “green” protection. The cytotoxicity effect of the different AgNPs against mononuclear cells showed a notable increment in the cell viability by the “green” functionalization.

Microwave synthesis of reduced graphene oxide decorated with silver nanoparticles for electrochemical determination of 4-nitrophenol

2016 ◽  
Vol 42 (16) ◽  
pp. 18813-18820 ◽  
Author(s):  
An’amt Mohamed Noor ◽  
Perumal Rameshkumar ◽  
Norazriena Yusoff ◽  
Huang Nay Ming ◽  
Mohd Shaiful Sajab
Keyword(s):  
Silver Nanoparticles ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Microwave Synthesis ◽  
Electrochemical Determination ◽  
Reduced Graphene

scholarly journals Microwave Synthesis of Silver Nanoparticles Using Different Pentose Carbohydrates as Reducing Agents

2018 ◽  
Vol 12 (1) ◽  
Author(s):  
David S. Chung ◽  
Hanna Kim ◽  
Jonathan Ko ◽  
Justine Lee ◽  
Bryant Hwang ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Microwave Synthesis ◽  
Reducing Agents

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.

Sign in / Sign up

Export Citation Format

Share Document