Synthesis of Monodisperse Silver Nanoparticles in Chitosan Solutions

Polydispersity vs. Monodispersity. How the Properties of Ni-Ag Core-Shell Nanoparticles Affect the Conductivity of Ink Coatings

“…Although monodisperse NPs provide better stability of ink formulations, which is especially important for optimal printing performance (avoiding aggregation and precipitation of NPs and nozzle clogging) [ 14 ], some specific requirements have to be addressed and several specific challenges should be overcome for the obtaining nanoparticles with monodisperse size distribution. To improve the monodispersity and prevent aggregation of metal NPs, the mass ratio of the stabilizers-to-precursors in the synthesis process should be usually high [ 15 ], which not only increases the cost of the fabrication of electronic circuits but can also decrease their conductivity due to the presence of a large amount of organic insulating material. In addition, it is also quite challenging to prepare the dispersions of monodisperse NPs of high concentrations (high metal loading is required for obtaining highly conductive patterns) and on a large scale.…”

Antibacterial Activity of Silver Nanodispersions in Solutions of Different Molecular Weight Chitosans

“…The aggregates size of ChT-311 and OChT-12/24 macromolecules measured previously in [53,54] using DLS in solutions with the same concentration as its content in most experiments 2).…”

“…Particle size measurements at the same values of pH, temperature, and concentration, and deacetylation degrees of samples were similar to previous studies. [53,54] Thus, one can assume that the obtained results are related to the limited OChT macromolecules ability to change its conformation because of the molecule length proximity to the persistent chain length. High molecular weight chitosan can have twisted conformation due to sufficient macromolecule length despite its rigid-chain nature.…”

Elemental Silver Nanoparticles: Biosynthesis and Bio Applications

“…In this connection, it seems appropriate to obtain chitosan-immobilized Ag-NP, which could be used as effective antibacterial agents. Now, however, only fragmentary information is available [212,213,214,215,216,217,218,219,220]. The influence of chitosan molecular weight on Ag-NP dimensional characteristics when they were formed in situ as a result of reduction of AgNO 3 precursor in solution of this biopolymer was studied by Apryatina et al [212,213].…”

“…Herewith, Ag-NP formed in chitosan solutions with a higher molecular mass and having a size of 8 nm, exhibit much more pronounced bactericidal activity than Ag-NP with a size of 12 nm [212,213]. In a recently published paper [214] Uryupina with co-authors obtained pseudospherical Ag-NP with an average size of 65 nm using chitosan.…”