title: Amino-acid-based, lipid-directed, in situ synthesis and fabrication of gold nanoparticles on silica: a metamaterial framework with pronounced catalytic activity.
abstract: We introduce a new example of the in situ preparation and fabrication of stable gold nanoparticles on silica in an aqueous medium, by using only lipid-grafted silica particles in HAuCl(4) solution without addition of any external reducing agent. The lipid-grafted silica particles have been synthesized by graft-to methodology and characterized by elemental analysis, thermogravimetric analysis and Fourier-transform infrared spectroscopy. The metamaterial particles show high catalytic activity for the reduction of p-nitrophenol to p-aminophenol.
authors.affiliation: Department of Applied Chemistry and Biochemistry, Kumamoto University, Chuo-ku, Kumamoto, Japan.
authors.forename: Sudipta
authors.initials: S
authors.lastname: Ray
authors.forename: Makoto
authors.initials: M
authors.lastname: Takafuji
authors.forename: Hirotaka
authors.initials: H
authors.lastname: Ihara
mesh_terms: D000596:Amino Acids / Q000737:chemistry*; D000627:Aminophenols / Q000138:chemical synthesis*; D002384:Catalysis; D003460:Crystallization / Q000379:methods; D006046:Gold / Q000737:chemistry*; D008055:Lipids / Q000737:chemistry*; D008420:Manufactured Materials / Q000032:analysis; D008422:Materials Testing; D053768:Metal Nanoparticles / Q000737:chemistry*; D009596:Nitrophenols / Q000737:chemistry*; D012822:Silicon Dioxide / Q000737:chemistry*
chemical_list: D000596:Amino Acids; D000627:Aminophenols; D008055:Lipids; D009596:Nitrophenols; D006046:Gold; D012822:Silicon Dioxide