title: Synthesis of gold nanoparticles using various amino acids.
abstract: Gold nanoparticles (4-7nm) were synthesized from tetraauric acid using various amino acids as reducing and capping agents. The gold nanoparticles were produced from the incubation of a AuCl4(-) solution with an amino acid at 80°C for 20min. Among the twenty amino acids tested, several amino acids produced gold nanoparticles. The color of the nanoparticle solutions varied with the amino acids used for the reduction. We adopted l-histidine as a reducing agent and investigated the effects of the synthesis conditions on the gold nanoparticles. The His and AuCl4(-) concentrations affected the size of the gold nanoparticles and their aggregates. The pH of the reaction solution also affected the reaction yields and the shape of the gold nanoparticles.
authors.affiliation: Department of Chemical Science and Engineering, Graduate School of Engineering, Kobe University, 1-1 Rokkodaicho, Nada-ku, Kobe 657-8501, Japan. Electronic address: tmarutcm@crystal.kobe-u.ac.jp.
authors.forename: Tatsuo
authors.initials: T
authors.lastname: Maruyama
authors.affiliation: Department of Chemical Science and Engineering, Graduate School of Engineering, Kobe University, 1-1 Rokkodaicho, Nada-ku, Kobe 657-8501, Japan.
authors.forename: Yuhei
authors.initials: Y
authors.lastname: Fujimoto
authors.affiliation: Department of Chemical Science and Engineering, Graduate School of Engineering, Kobe University, 1-1 Rokkodaicho, Nada-ku, Kobe 657-8501, Japan.
authors.forename: Tetsuya
authors.initials: T
authors.lastname: Maekawa
mesh_terms: D000596:Amino Acids / Q000737:chemistry*; D006046:Gold / Q000737:chemistry*; D006639:Histidine / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry*; D046529:Microscopy, Electron, Transmission; D010316:Particle Size
chemical_list: D000596:Amino Acids; D006639:Histidine; D006046:Gold
keywords: Au nanoparticles; Biomineralization; Capping; Reduction; l-Amino acids