Synthesis of gold nanoparticles and thin films with the use of micellar solution of Brij 30

Zinc Peroxide Nanoparticles: Micellar Synthesis and Preparation of Films

“…Above, as a disadvantage of reverse micellar synthesis, it was noted that it allows one to obtain organosols with only a low content of NPs, which are inefficient for subsequent concentration and isolation of synthesis products. Nevertheless, such organosols can be used directly for the deposition of NP films, which has been previously shown earlier by the example of Au NPs [40,41]. In the present work, this possibility is tested for the preparation of films using synthesized organosols of ZnO 2 NPs, as well as a mixture of ZnO 2 and Au NPs.…”

“…Aqueous solutions of Zn(CH 3 COO) 2 ⋅2H 2 O (1 M) and HAuCl 4 (0.2 M) from gold metal, as well as solutions of surfactants (0.25 M) in decane, of (3-aminopropyl)triethoxysilane (APS, 0.02 M) in toluene, and of ethanedithiol (EDT, 0.01 M) in ethanol, were prepared from weighed portions of the reagents as described in [40]. Reverse micellar solutions of Zn(CH 3 COO) 2 , HAuCl 4 , H 2 O 2 , and N 2 H 4 were obtained by injection solubilization of portions of their aqueous solutions of volume V s in a portion of a 0.25 M Brij 30 organic solution of volume V o .…”

“…Organosol of Au NPs (c Au = 5 mM, V s /V o = 0.01) was obtained by mixing reverse micellar solutions of HAuCl 4 and N 2 H 4 [40], and the sol of the mixture of NPs (c Zn = 4.3 mM, c Au = 2.3 mM, V s /V o = 0.015) was prepared by mixing equal volumes of organosols of ZnO 2 and Au NPs.…”

“…The film formation process consisted of repeating this cycle the required number of times (n). The methods for preparing substrates, including cleaning and modifying their surface with amino groups using APS, as well as depositing films by chemisorption of NPs from the capillary layer of their colloidal dispersion, have been described earlier [40][41][42]. Equipment and conditions for studying solutions, particles and films by UV-visible, IR, and Raman spectroscopy, X-ray diffraction, photoluminescence (PL), scanning electron microscopy (SEM), X-ray energy dispersive spectroscopy (EDX), four-contact surface resistance measurements have already been reported elsewhere [41,43].…”

Noble Metal Nanostructured Materials for Chemical and Biosensing Systems

“…Furthermore, using a thiol compound such as 5-phenylthiocarbazole or cysteine as stabilizer and a large molecular polymer such as polyhexamethylene glycol, silk fibroin or polyaniline as reducing agent, the prepared AuNPs were with a uniform particle size and suitable for the construction of sensing systems with high performance [32,33]. Reverse micelle or microemulsion method refers to a heterogeneous liquid phase synthesis method for forming micelles or reverse micelle droplets between a surfactant and a solution for restraining the size or morphology of NPs [34]. The surfactant can disperse the NPs well, making them less prone to agglomeration and precipitation.…”