Extracellular Biosynthesis of Bimetallic Au-Ag Alloy Nanoparticles

The exposure of a mixture of 1 mM HAuCl4 and 1 mM AgNO3 solutions to different amounts of fungal biomass (Fusarium oxysporum) results in the formation of highly stable Au–Ag alloy nanoparticles with dimensions of 8–14 nm depending on metal molar fraction (see image). The amount of cofactor NADH rele...

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Bibliographic Details
Published in:Small (Weinheim an der Bergstrasse, Germany) Germany), 2005-05, Vol.1 (5), p.517-520
Main Authors: Senapati, Satyajyoti, Ahmad, Absar, Khan, Mohammad I., Sastry, Murali, Kumar, Rajiv
Format: Article
Language:English
Subjects:
alloys
Ascomycota - chemistry
Biomass
biosynthesis
Colloids - chemistry
composites
Electrons
enzymes
Gold - chemistry
Iron - chemistry
Metal Nanoparticles - chemistry
Microscopy, Electron, Transmission
nanoparticles
Nanoparticles - chemistry
Nanotechnology - methods
Nanowires - chemistry
Silver - chemistry
Spectrophotometry, Ultraviolet
Time Factors
X-Rays
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Summary:The exposure of a mixture of 1 mM HAuCl4 and 1 mM AgNO3 solutions to different amounts of fungal biomass (Fusarium oxysporum) results in the formation of highly stable Au–Ag alloy nanoparticles with dimensions of 8–14 nm depending on metal molar fraction (see image). The amount of cofactor NADH released by the F. oxysporum fungus plays an important role in controlling the composition of the alloy nanoparticles.
ISSN:1613-6810
1613-6829
DOI:10.1002/smll.200400053