Kateryna Bryleva, Zinaida Bunina, Victoria Varchenko, Olena Hryshyna, Konstantin Belikov, Anatoliy Paliy, Olena Kolchyk, Larisa Kovalenko
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Effect of stabilizers on composition and stability of bimetallic copper/silver nanoparticles
The study investigated processes of bimetallic copper/silver nanoparticle formation in aqueous media using two reducing agents: sodium borohydride and ascorbic acid. Adding these reducing agents in sequence allows the synthesis of bimetallic nanoparticles at room temperature. The influence of stabilizing agents such as sodium dodecyl sulfate, cetyltrimethylammonium bromide, and oleic acid and their combinations on the composition of nanoparticles in suspensions and the stability of suspensions was examined. When using a combination of oleic acid and sodium dodecyl sulfate, bimetallic copper/silver nanoparticles with a preset composition of 4:1 were formed. These nanosized systems remain stable for at least 3 months. The proposed synthetic method allows the fabrication of copper/silver nanoparticles ranging in size from 30 to 40 nm. The studied nanoparticles were shown to completely inhibit the colony growth of E. coli and S. aureus test strains on dense nutrient media when diluted to 10%, with exposure times of 3 and 5 h.
期刊介绍：
The objective of the Journal of Nanoparticle Research is to disseminate knowledge of the physical, chemical and biological phenomena and processes in structures that have at least one lengthscale ranging from molecular to approximately 100 nm (or submicron in some situations), and exhibit improved and novel properties that are a direct result of their small size.
Nanoparticle research is a key component of nanoscience, nanoengineering and nanotechnology.
The focus of the Journal is on the specific concepts, properties, phenomena, and processes related to particles, tubes, layers, macromolecules, clusters and other finite structures of the nanoscale size range. Synthesis, assembly, transport, reactivity, and stability of such structures are considered. Development of in-situ and ex-situ instrumentation for characterization of nanoparticles and their interfaces should be based on new principles for probing properties and phenomena not well understood at the nanometer scale. Modeling and simulation may include atom-based quantum mechanics; molecular dynamics; single-particle, multi-body and continuum based models; fractals; other methods suitable for modeling particle synthesis, assembling and interaction processes. Realization and application of systems, structures and devices with novel functions obtained via precursor nanoparticles is emphasized. Approaches may include gas-, liquid-, solid-, and vacuum-based processes, size reduction, chemical- and bio-self assembly. Contributions include utilization of nanoparticle systems for enhancing a phenomenon or process and particle assembling into hierarchical structures, as well as formulation and the administration of drugs. Synergistic approaches originating from different disciplines and technologies, and interaction between the research providers and users in this field, are encouraged.
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