title: Biocatalytic growth of Au nanoparticles: from mechanistic aspects to biosensors design.
abstract: The H(2)O(2)-mediated enlargement of Au nanoparticles (NPs) and the growth mechanism are described. In addition to the deposition of gold on the NP faces, the formation of nanocrystalline clusters at the intersection of the faces is observed. The detachment of the latter nanoclusters provides additional seeds for the deposition of gold. The biocatalyzed generation of H(2)O(2) in the presence of O(2)/glucose and glucose oxidase enabled the development of an optical biosensor for glucose.
authors.affiliation: Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem 91904, Israel.
authors.forename: Maya
authors.initials: M
authors.lastname: Zayats
authors.forename: Ronan
authors.initials: R
authors.lastname: Baron
authors.forename: Inna
authors.initials: I
authors.lastname: Popov
authors.forename: Itamar
authors.initials: I
authors.lastname: Willner
mesh_terms: D015374:Biosensing Techniques; D002384:Catalysis; D005947:Glucose / Q000032:analysis* / Q000737:chemistry; D005949:Glucose Oxidase / Q000737:chemistry; D006046:Gold / Q000737:chemistry*; D006861:Hydrogen Peroxide / Q000737:chemistry; D046529:Microscopy, Electron, Transmission; D049329:Nanostructures; D010100:Oxygen / Q000737:chemistry; D013057:Spectrum Analysis
chemical_list: D006046:Gold; D006861:Hydrogen Peroxide; D005949:Glucose Oxidase; D005947:Glucose; D010100:Oxygen