Molecular-mediated assembly of silver nanoparticles with controlled interparticle spacing and chain length

2012 ◽  
Vol 22 (41) ◽  
pp. 22204 ◽  
Author(s):  
Rafael Abargues ◽  
Sandra Albert ◽  
José L. Valdés ◽  
Kamal Abderrafi ◽  
Juan P. Martínez-Pastor
Keyword(s):  
Silver Nanoparticles ◽  
Chain Length ◽  
Interparticle Spacing

scholarly journals Silver Nanoparticles Stabilized with Phosphorus-Containing Heterocyclic Surfactants: Synthesis, Physico-Chemical Properties, and Biological Activity Determination

Nanomaterials ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 1883
Author(s):  
Martin Pisárčik ◽  
Miloš Lukáč ◽  
Josef Jampílek ◽  
František Bilka ◽  
Andrea Bilková ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Biological Activity ◽  
Zeta Potential ◽  
Chain Length ◽  
Alkyl Chain ◽  
Chemical Properties ◽  
Alkyl Chain Length ◽  
Microbial Pathogens ◽  
Physico Chemical ◽  
Phosphorus Containing

Phosphorus-containing heterocyclic cationic surfactants alkyldimethylphenylphospholium bromides with the alkyl chain length 14 to 18 carbon atoms were used for the stabilization of silver nanodispersions. Zeta potential of silver nanodispersions ranges from +35 to +70 mV, which indicates the formation of stable silver nanoparticles (AgNPs). Long-chain heptadecyl and octadecyl homologs of the surfactants series provided the most intensive stabilizing effect to AgNPs, resulting in high positive zeta potential values and smaller diameter of AgNPs in the range 50–60 nm. A comparison with non-heterocyclic alkyltrimethylphosphonium surfactants of the same alkyl chain length showed better stability and more positive zeta potential values for silver nanodispersions stabilized with heterocyclic phospholium surfactants. Investigations of biological activity of phospholium-capped AgNPs are represented by the studies of antimicrobial activity and cytotoxicity. While cytotoxicity results revealed an increased level of HepG2 cell growth inhibition as compared with the cytotoxicity level of silver-free surfactant solutions, no enhanced antimicrobial action of phospholium-capped AgNPs against microbial pathogens was observed. The comparison of cytotoxicity of AgNPs stabilized with various non-heterocyclic ammonium and phosphonium surfactants shows that AgNPs capped with heterocyclic alkyldimethylphenylphospholium and non-heterocyclic triphenyl-substituted phosphonium surfactants have the highest cytotoxicity among silver nanodispersions stabilized by the series of ammonium and phosphonium surfactants.

Atomistic Simulations of Coating of Silver Nanoparticles with Poly(vinylpyrrolidone) Oligomers: Effect of Oligomer Chain Length

2015 ◽  
Vol 119 (14) ◽  
pp. 7888-7899 ◽  
Author(s):  
Alexander Kyrychenko ◽  
Oleksandr M. Korsun ◽  
Iurii I. Gubin ◽  
Sergiy M. Kovalenko ◽  
Oleg N. Kalugin
Keyword(s):  
Silver Nanoparticles ◽  
Chain Length ◽  
Atomistic Simulations

One-dimensional aluminum nanoparticle chains: the influence of interparticle spacing and chain length on plasmon coupling behavior

2017 ◽  
Vol 5 (18) ◽  
pp. 4379-4383 ◽  
Author(s):  
Junais Habeeb Mokkath ◽  
Joel Henzie
Keyword(s):  
Metal Nanoparticles ◽  
Chain Length ◽  
Interparticle Spacing ◽  
Plasmon Coupling ◽  
One Dimensional ◽  
Coupling Behavior ◽  
Significant Interest ◽  
Nanoparticle Chains

Ordered arrangements of metal nanoparticles have attracted significant interest due to their ability to focus and confine light to deeply subwavelength scales.

scholarly journals Microstructural Characterization of Silver Nanoparticles for Bioimaging Applications

2012 ◽  
Vol 18 (S5) ◽  
pp. 53-54
Author(s):  
A. P. Zaderenko ◽  
C. Caro ◽  
M. de la Mata ◽  
J. A. Sánchez ◽  
M. J. Sayagués
Keyword(s):  
Silver Nanoparticles ◽  
Electromagnetic Fields ◽  
Rayleigh Scattering ◽  
Microstructural Characterization ◽  
Interparticle Spacing ◽  
Extinction Coefficients ◽  
Surface Enhanced ◽  
Molar Extinction Coefficients

Silver nanoparticles are emerging as a powerful tool in bioimaging applications owing to their unique plasmonic properties i.e., extremely high molar extinction coefficients, resonant Rayleigh scattering and enhanced local electromagnetic fields. Through the optimization of these properties, by controlling composition, size, shape, and interparticle spacing of nanoparticles and their assemblies, highly enhanced local electromagnetic fields in the vicinity of nanoparticles are achievable giving rise to IR, Raman and fluorescence surface enhanced spectroscopies (SEIRS, SERS and MEF, respectively).

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