Preparation of Silver Nanostructures from Bicontinuous Microemulsions
Abstrak
Precipitation of silver nanoparticles at 70°C was carried out by dosing a 1.3 M sodium borohydride aqueous solution over bicontinuous microemulsions formed with a mixture of sodium bis(2‐ethylhexyl) sulfosuccinate (AOT) and sodium dodecylsulfate (SDS) as surfactants, a 0.5 M silver nitrate aqueous solution, and toluene. Weight ratios of 2.5/1 and 3/1 AOT/SDS were used in the precipitation reactions. Silver nanoparticles were characterized by transmission electronic microscopy, X‐ray diffraction, and atomic absorption spectroscopy. A mixture of isolated spheroidal nanoparticles (≈15 wt.%) with an average diameter around 10 nm and wormlike structures (≈85 wt.%) with an average length close to 480 nm and an average diameter ca. 40 nm was obtained, regardless of the AOT/SDS ratio. Higher yields were obtained compared with those reported when reverse microemulsions were employed. Formation of wormlike structures was ascribed to one‐dimensional aggregation of crystal and particles within the channels of bicontinuous microemulsions, which performed as templates.
Penulis (7)
M. A. Pedroza-Toscano
M. Rabelero-Velasco
R. Díaz de León
H. Saade
R. G. López
E. Mendizábal
J. E. Puig
Akses Cepat
- Tahun Terbit
- 2012
- Bahasa
- en
- Total Sitasi
- 5×
- Sumber Database
- CrossRef
- DOI
- 10.1155/2012/975106
- Akses
- Open Access ✓