Abstract
The scientific community has paid special attention to silver nanoparticles (AgNPs) in recent years due to their huge technological capacities, particularly in biomedical applications, such as antimicrobials, drug-delivery carriers, device coatings, imaging probes, diagnostic, and optoelectronic platforms. The most popular method of obtaining silver nanoparticles as a colloidal dispersion in aqueous solution is chemical reduction. The choice of the capping agent is particularly important in order to obtain the desired size distribution, shape, and dispersion rate of AgNPs. Gemini alkylammonium salts are named as multifunctional surfactants, and possess a wide variety of applications, which include their use as capping agents for metal nanoparticles synthesis. Because of the high antimicrobial activity of gemini surfactants, AgNPs stabilized by this kind of surfactant may possess unique and strengthened biocidal properties. The present paper presents the synthesis of AgNPs stabilized by gemini surfactants with hexadecyl substituent and variable structure of spacer, obtained via ecofriendly synthesis. UV-Vis spectroscopy and dynamic light scattering were used as analyzing tools in order to confirm physicochemical characterization of the AgNPs (characteristic UV-Vis bands, hydrodynamic diameter of NPs, polydispersity index (PDI)).
Highlights
Over the past twenty years, silver nanoparticles (AgNPs) have become increasingly popular due to their special physical, chemical, and biological properties
Silver nanoparticles can be helpful in managing the ongoing pandemic of COVID-19 (Coronavrus Disease 2019) caused by the SARS-CoV-2 [24,25]
In reference to the growing interest in silver nanoparticles and gemini surfactants, we focused on the different procedures for obtaining silver nanoparticles capped with gemini surfactants, having a different structure in spacer unit, obtained in easy, low-cost, and green synthesis
Summary
Over the past twenty years, silver nanoparticles (AgNPs) have become increasingly popular due to their special physical, chemical, and biological properties. AgNPs have been tested as biomedical device coatings [12,26,27,28], combating multidrug-resistant cancer [12,29], drug-delivery carriers [12,30], and imaging probes in ultrasensitive analysis [26,31,32,33,34] They may find applications in sensing [27,31,35,36] and chemical catalysis [32,35,37,38,39]. Chemical reduction is the most frequently used synthesis method of silver nanoparticles, with high productivity and low costs [39,41] In this approach, stable colloids in water or non-aqueous solvents can be obtained. We should mention that a proper stabilizer and/or reaction time is crucial for the obtaining of stable and small size Ag nanoparticles [44]
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