The Tail Effect of Some Prepared Cationic Surfactants on Silver Nanoparticle Preparation and Their Surface, Thermodynamic Parameters, and Antimicrobial Activity

Abstract

The surface parameters of some cationic surfactants having different hydrophobic alkyl chains were assessed in aqueous solution using different techniques; surface tension, ultraviolet‐Visible (UV–Vis) spectroscopy, and conductivity measurements. The obtained critical micelle concentration (CMC) for N‐(2‐((3,4‐dimethoxybenzylidene)amino)ethyl)‐N,N‐dimethyloctan‐1‐aminium bromide (DBAO), N‐(2‐((3,4‐dimethoxybenzylidene)amino)ethyl)‐N,N‐dimethyldodectan‐1‐aminium bromide (DBAD), and N‐(2‐((3,4‐dimethoxybenzylidene)amino)ethyl)‐N,N‐dimethylhexadectan‐1‐aminium bromide (DBAH) in aqueous solution using three techniques are nearly the same. Increasing the hydrophobic chain length enhances micelle formation. Raising the solution temperature from 25 to 65 °C also shows the same trend. The thermodynamic calculations outlined the adsorption propensity of the surfactants at the surface compared to their affinity to form micelles. Both micellization and adsorption processes are enhanced with both the hydrocarbon elongation and with raising the solution temperature. The effect of the surfactant tail on the preparation process of the silver nanoparticles (AgNP) was assessed and confirmed using transmission electron microscope (TEM), dynamic light scattering (DLS), and UV–Vis spectra. Increasing the surfactant tail leads to a smaller particle size with a narrow distribution. The stability of the prepared AgNP is enhanced with hydrophobic surfactant tail elongation as proved with increasing the zeta‐potential of the prepared AgNP colloid. The foaming power, interfacial tension, and emulsification stability of the DBAO, DBAD, and DBAH surfactants were determined. The DBAO, DBAD, and DBAH surfactants showed good antimicrobial activities against both bacteria (Gram positive and negative) and fungi, which have been enhanced because of incorporation of AgNP.

Role of a novel cationic gemini surfactant (CGS) on a one-step sol–gel process and photocatalytic properties of TiO2 powders

“…The application of surfactants and the surfactant-mediated production of nanoparticles have attracted great interest (Nogueira et al 2015;Xu et al 2015). Nanoparticle fabrication requires different strategies to bulk material fabrication and should be conducted (Khamhaengpol & Siri 2016;Shaban et al 2019). It has been detected that SDBS (sodium dodecyl benzene sulfonate), CTAB, and TX-100 used to control the morphologies and structures of TiO 2 / reduced grapheme oxide (TiO 2 /RGO) as anionic, cationic, and non-ionic surfactants enhanced the catalyst surface area from 153 to 277 m 2 /g.…”

“…First, the novel dicationic surfactants with functional groups rich in nitrogen atoms that provide increased electronic charge density and length of hydrophobic tail create the TiO 2 particles' resistance to aggregation in time. On the other hand, increasing the number of head groups in surfactant structure leads to electrostatic interaction with the prepared TiO 2 and steric barriers to protect the nanoparticles from aggregation (Shaban et al 2019). Thus, monodispersed TiO 2 nano materials can produce high homogenous surface area with more active sites in the wastewater treatment.…”

Recent Advances in Aptamer Sensors

“…Because of their size-dependent physical and chemical properties, biocompatibility, electronic properties, magnetic properties, and ability to manifest biological signaling and transduction mechanisms, the nanomaterials are providing great advances in the field of sensors. Several nanomaterials have been synthesized with different sizes and shapes such as gold nanoparticles (AuNPs), silica nanoparticles, silver nanoparticles (AgNPs), magnetic nanoparticles (MNPs), and carbon quantum dots (CQDs) as unique templates for many applications such as biomaterial assays; the diagnosis, monitoring, and treatment of disease; and drug delivery [ 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 ]. Interestingly, nanomaterials are being used as potential candidates for immobilization using aptamers to obtain nanosensor probes for several targets, with more amplification and various signals such as colorimetric, fluorometric, electrochemical, or optical [ 31 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 , 49 ].…”

The potential of violet, blue, green and red light for the inactivation of P. fluorescens as planktonic cells, individual cells on a surface and biofilms

“…In the last decades, innovative non-thermal technologies have been suggested for widespread decontamination application: clinical, industrial and commercial. Some technologies that have attracted a lot of attention are cold atmospheric plasma (CAP) (Govaert et al, 2020), cold ice blasting (Stratford et al, 1994), pulsed electric field (PEF) (Bansal et al, 2015), high-intensity light pulse (HILP) (Palgan et al, 2011), nanomaterial usage (Shaban et al, 2019), photocatalysis and smart coatings (Yemmireddy and Hung, 2017), sonication and mild temperatures (Guerrouj et al, 2016), enzymatic solutions (Lequette et al, 2010) and photodynamic inactivation (PDI) (Angarano et al, 2020). PDI technology is based on the absorption of light by endogenous or exogenous photosensitizers (PS).…”