Directed synthesis of micro-sized nanoplatelets of gold from a chemically active mixed surfactant mesophase
Date of Original Version
We report the synthesis of gold nanoparticles of controllable size and morphology from ordered mesophase templates comprised of iso-octane, sodium bis(2-ethylhexyl) sulfosuccinate (AOT) and lecithin along with an aqueous phase containing auric acid (HAuCl4), the gold precursor. Highly facetted nanoparticles are formed by the reduction of HAuCl4 directly by the dioctyl sulfosuccinate termini of AOT. In sharp contrast, rapid reduction of the gold precursor by the addition of sodium borohydride NaBH4 in the aqueous phase results in spherical nanoparticles. The size of the nanoparticles can be adjusted by varying the auric acid concentration as well as the volume fraction of the aqueous phase. The value of this technique is the ease with which nanoscale particles of different shape and size can be formed, with concomitant impact on their physical and chemical properties. © 2008 Springer-Verlag.
Advances in Polymer Science
Sarkar, Jayashri, Ganapathiraman Ramanath, Vijay John, and Arijit Bose. "Directed synthesis of micro-sized nanoplatelets of gold from a chemically active mixed surfactant mesophase." Advances in Polymer Science 218, 1 (2008): 235-249. doi:10.1007/12_2008_167.