Biocatalytic growth of Au nanoparticles: from mechanistic aspects to biosensors design.
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.
Zayats
Maya
M
Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem 91904, Israel.
Baron
Ronan
R
Popov
Inna
I
Willner
Itamar
I
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
D006046:Gold; D006861:Hydrogen Peroxide; D005949:Glucose Oxidase; D005947:Glucose; D010100:Oxygen