@article{oai:soar-ir.repo.nii.ac.jp:00012322,
 author = {Sakai,  Toshio and Enomoto,  Hiroto and Sakai,  Hideki and Abe,  Masahiko},
 issue = {3},
 journal = {ULTRASONICS SONOCHEMISTRY},
 month = {May},
 note = {Spherical gold nanoparticles (AuNPs) were selectively synthesized through sonochemical reduction of tetrachloride gold(III) ions ([AuCl4](-)) in an aqueous solution of hydrogen tetrachloroaurate(III) tetrahydrate (HAuCl4.H2O) with the aid of hydrogen (H-2) gas in the absence of any additional capping agents. On the other hand, various shaped-AuNPs such as spherical nanoparticles, triangular and hexagonal plates were formed from sonochemical reduction of [AuCl4](-) in argon (Ar)-, nitrogen (N-2)- or oxygen (O-2)-purged aqueous [AuCl4](-) solutions. The selective fabrication of spherical AuNPs assisted by H-2 gas is most likely attributed to the generation of hydrogen radicals (H center dot) promoted by the reaction of H-2 introduced and hydrogen oxide radicals (center dot OH) produced by sonolysis of water., Article, ULTRASONICS SONOCHEMISTRY. 21(3):946-950 (2014)},
 pages = {946--950},
 title = {Hydrogen-assisted fabrication of spherical gold nanoparticles through sonochemical reduction of tetrachloride gold(III) ions in water},
 volume = {21},
 year = {2014}
}