Kinetic Study on the Formation of Colloidal Gold in the Presence of Acetylenic Glycol Nonionic Surfactant

Sonochemical Processes and Formation of Gold Nanoparticles within Pores of Mesoporous Silica

“…Reaction [2] indicates the formation of strong reducing radicals (CH 3 ) 2 C ᭹ OH via hydrogen abstraction from the isopropanol by H ᭹ and ᭹ OH hydroxyl radicals. Multivalent AuCl − 4 ions in the pores were reduced rapidly by multistep radical reactions and subsequently the Au atoms aggregated, as shown in reactions [3] and [4].…”

“…Accordingly, considerable effort has been focused on the development of synthetic techniques. Many studies on the methods for their preparation were reported, such as controlled chemical reduction (3,4), photochemical or radiation-chemical reduction (5,6), and gas evaporation (7). In order to prevent the formation of undesired agglomeration, these processes are often performed in the presence of stabilizing ligands, polymers, or various surfactants.…”

Surfactant effects on the microstructures of Fe3O4 nanoparticles synthesized by microemulsion method

“…About Gemini surfactants, there have the relevant reports on the application of template synthesis of various materials, such as gold particles and organized mesoporous silica [48][49][50]. Here, a Gemini surfactant dimethylene-1,2-bis(dodecyldimethylammonium bromide), abbreviated as 12-2-12, has been devised as surfactant phase to synthesize the nanosized Fe 3 O 4 particles in water-in-oil microemulsion.…”

Synthesis and functionalities of noble metal nanoparticles formed through simple all-inorganic photochemical procedures

“…At the same time, a new band appears to grow at 205 nm. It has been reported that the photolytic generation of metal gold particles proceeds through a preliminary reduction of initial Au 3þ cations into Au þ ones, followed by a complementary reduction of these latter cations yielding Au metal particles [57,58]. We previously evidenced such a multistep reduction mechanism during the photolytic formation of platinum particles from CPA solutions [36].…”