title: Synthesis of plant-mediated gold nanoparticles and catalytic role of biomatrix-embedded nanomaterials.
abstract: Growth of Sesbania seedlings in chloroaurate solution resulted in the accumulation of gold with the formation of stable gold nanoparticles in plant tissues. Transmission electron microscopy revealed the intracellular distribution of monodisperse nanospheres, possibly due to reduction of the metal ions by secondary metabolites present in cells. X-ray absorption near-edge structure and extended X-ray absorption fine structure demonstrated a high degree of efficiency for the biotransformation of Au(III) into Au(0) by planttissues. The catalytic function of the nanoparticle-rich biomass was substantiated by the reduction of aqueous 4-nitrophenol (4-NP). This is the first report of gold nanoparticle-bearing biomatrix directly reducing a toxic pollutant, 4-NP.
authors: Department of Biology, Western Kentucky University, 1906 College Heights Blvd. # 11080, Bowling Green, Kentucky 42101, USA.
authors: Nilesh C
authors: NC
authors: Sharma
authors: Shivendra V
authors: SV
authors: Sahi
authors: Sudip
authors: S
authors: Nath
authors: Jason G
authors: JG
authors: Parsons
authors: Jorge L
authors: JL
authors: Gardea-Torresdey
authors: Tarasankar
authors: T
authors: Pal
mesh_terms: D001672:Biocompatible Materials; D002384:Catalysis; D006046:Gold / Q000737:chemistry*; D053768:Metal Nanoparticles; D046529:Microscopy, Electron, Transmission; D010944:Plants / Q000737:chemistry*
chemical_list: D001672:Biocompatible Materials; D006046:Gold
references: Nat Mater. 2004 Jul;3(7):482-8
references: 15208703
references: Environ Sci Technol. 2002 Nov 1;36(21):4676-80
references: 12433181
references: Langmuir. 2004 Nov 9;20(23):9889-92
references: 15518467
references: Environ Toxicol Chem. 2004 Sep;23(9):2068-73
references: 15378980
references: J Synchrotron Radiat. 2001 Mar 1;8(Pt 2):314-6
references: 11512764
references: J Synchrotron Radiat. 1998 Mar 1;5(Pt 2):118-22
references: 16687813
references: J Nat Prod. 1981 Jan-Feb;44(1):86-90
references: 7217949