Nanoparticle induced formation of self-assembled zwitterionic surfactant microdomains which mimic microemulsions for the in situ fabrication and dispersion of silver nanoparticles

Abstract

The illustration of the mechanism of fabrication of dispersive microemulsion enclosing Ag-NPs.

Preparation of Highly Concentrated Uniform-Sized Silver Nanoparticles via Use of Thermoresponsive Zwitterionic Surfactants

“…24.8 ± 5.2 nm). The fact that similar sized AuNP were observed at different C 10 APSO 4 concentrations is consistent with the formation of a zwitterionic surfactant coating on the individual metal NPs or citrate-coated NPs, as described in the Synthesis and Characterization section, and has literature precedent. − …”

“…At the lowest C 10 APSO 4 concentration (0.44%) examined, no formation of a surfactant-rich phase was observed and flocculation (aggregation) of the AgNPs occurred. (Note: The critical micellar concentration of C 10 APSO 4 was reported to be 0.24 w/w% (7.4 mM) at 25 °C in the absence of Ag ions; therefore, the formation of micelles is expected in this study.) No aggregation of the synthesized AgNPs was observed at C 10 APSO 4 concentrations above 0.89%; instead, a mixture of spherical and cylindrical-shaped NPs was observed.…”

“…The alkyll chain length of these zwitterionic surfactants influences the synthesis by altering the distribution of the synthesized AgNPs into the surfactant rich phase with the surfactant having the shortest alkyl chain yielding the lowest E%. Previously, in the synthesis of AgNPs in zwitterionic surfactant systems, the longest surfactant alkyl chain (C 10 -) was reported to assemble into a microdrop liquid phase more easily than C 8 - or C 9 APSO 4 …”

“…Previously, in the synthesis of AgNPs in zwitterionic surfactant systems, the longest surfactant alkyl chain (C 10 -) was reported to assemble into a microdrop liquid phase more easily than C 8 -or C 9 APSO 4 . 45 Impact of the Citrate Concentration. Despite the drawbacks of the use of citrate as a reductant in the preparation of AgNPs, trisodium citrate was employed in this study owing to its reduction effectiveness in hot water.…”

Synthesis ofN‐Acetylcysteine Conjugated Cholic Acid Stabilized Gold and Silver Nanoparticles: Evaluation of Their Catalytic Activity and Toxicity Assessment

“…[16,17] In the last two decades significant effort has been devoted for the synthesis of size and shape controlled Ag and Au NPs using differently charged cationic, anionic, zwitterionic and non-ionic traditional surfactant as stabilizing agent using various reducing agent. [18][19][20] For instance, Esumi et al reported synthesis of monodispersed colloidal AuNPs using cationic surfactant and investigated the effect of surfactant molecular structure on the NPs properties. [21] Geckeler et al had reported differently charged surfactant directed multiple anisotropic Au nanostructures and used as an active material in surfaceenhanced Raman scattering.…”