title: Seedless synthesis of octahedral gold nanoparticles in condensed surfactant phase.
abstract: We report a seedless synthetic method of gold octahedral nanoparticles in an aqueous phase. Eight facets with {111} crystalline structures of octahedral nanoparticles could be formed in an aqueous medium when the gold salt was reduced by ascorbic acid at room temperature in the presence of cetyltrimethylammonium bromide as a shape-inducing agent, and hydrogen peroxide as a reaction promoter. The growth kinetics and surface crystalline structures were characterized by UV-vis spectroscopy, transmission electron microscopy (TEM), scanning electron microscopy (SEM), and X-ray photoelectron spectroscopy.
authors.affiliation: Department of Chemical Engineering, Sungkyunkwan University, Suwon 440-746, South Korea.
authors.forename: Cuong
authors.initials: C
authors.lastname: Cao
authors.forename: Sungho
authors.initials: S
authors.lastname: Park
authors.forename: Sang Jun
authors.initials: SJ
authors.lastname: Sim
mesh_terms: D001205:Ascorbic Acid / Q000737:chemistry; D000077286:Cetrimonium; D002593:Cetrimonium Compounds / Q000737:chemistry; D003460:Crystallization; D006046:Gold / Q000737:chemistry*; D006861:Hydrogen Peroxide / Q000737:chemistry; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D008855:Microscopy, Electron, Scanning; D046529:Microscopy, Electron, Transmission; D036103:Nanotechnology / Q000379:methods*; D013056:Spectrophotometry, Ultraviolet; D013057:Spectrum Analysis; D013499:Surface Properties; D013501:Surface-Active Agents / Q000737:chemistry*; D013997:Time Factors; D014867:Water / Q000737:chemistry; D014965:X-Rays
chemical_list: D002593:Cetrimonium Compounds; D013501:Surface-Active Agents; D014867:Water; D006046:Gold; D006861:Hydrogen Peroxide; D001205:Ascorbic Acid; D000077286:Cetrimonium