Controlled Growth of Gold Nanoparticles in Aerosol-OT/Sorbitan Monooleate/Isooctane Mixed Reverse Micelles

Gold Nanoparticles in Biomedical Applications

“…Seed-mediated growth where small particles produced by other techniques like irradiation were exploited as seeds and fresh Au(III) ions were reduced onto the surface of the seed particles by reducing agents like ascorbic acid 41 , use of reverse micelles which involves reduction of HAuCl4 in sodium bis (2-ethylhexyl) sulfosuccinate /isooctane reverse micelles system using reducing agents like ascorbic acid 42 ,phase transfer reactions as a representative reaction in a novel water-cyclohexane two-phase system, the aqueous formaldehyde is transferred to cyclohexane phase via reaction with dodecylamine to form reductive intermediates in cyclohexane; the intermediates are capable of reducing gold ions in aqueous solution to form gold nanoparticles in cyclohexane solution at room temperature.…”

Mixing speed-controlled gold nanoparticle synthesis with pulsed mixing microfluidic system

“…In almost all the cases, the latter approach has been taken and various reduction methods such as ultrasonic (Nagata et al 1996), ultraviolet (Esumi et al 1998), and chemical methods (Jana et al 2001;Turkevich et al 1951;Frens 1973;Chow and Zukoski 1994;Freund and Spiro 1985;Muhlpfordt 1982;Chiang 2000;Nakamoto et al 2005) have been reported. The chemical reduction method with a reducing agent has been most frequently used for scientific studies and commercial production, since it allows the synthesis of large quantities of nanoparticles and offers better control of the mean particle size by changing the type of reducing agent, reaction temperature, and concentration of the solution.…”

Mixed micelles of cetyltrimethylammonium bromide and poly(ethylene glycol)-600 monolaurate as catalysts of polyethylenimine phosphorylation in chloroform

“…It is known that reverse micellar systems, including those of the mixed type, can act as nanoreactors for the synthesis of practically impor tant compounds. 8, 9 In the present work, we studied the micelle formation in a mixture of cationic (cetyltrimethylammonium bro mide, CTAB) and nonionogenic (poly(ethylene gly col) 600 monolaurate, PM) surfactants in chloroform and the effect of reverse micelles on the reaction of 4 nitrophenylbis(chloromethyl)phosphinate (NCP) with branched polyethylenimines (PEI) containing 2 hydroxybenzyl substituents at the secondary and ter tiary nitrogen atoms: CH 2 C 6 H 4 OH 2 (PEI 1) and CH 2 C 6 H 3 (OH 2)(i C 9 H 19 5) (PEI 2-PEI 4). The de gree of substitution (the number of substituted fragments per unsubstituted PEI fragment) for PEI 1, PEI 2, PEI 3, and PEI 4 was 0.3, 0.12, 0.16, and 0.3, respectively.…”