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Bhargava, S.K. et al.

Bhargava, Booth, Agrawal, Coloe, Kar,

Gold nanoparticle formation during bromoaurate reduction by amino acids.

The synthesis and characterization of water-soluble dispersions of gold nanoparticles by the reduction of a potassium tetrabromoaurate precursor solution using the amino acids L-tyrosine, glycyl-L-tyrosine, and L-arginine using alkaline synthesis conditions are reported. The particle sizes determined by small-angle X-ray scattering (SAXS) and high-resolution transmission electron microscopy (HRTEM) measurements are found to be inversely proportional to the rate of particle formation, which was determined by time-resolved UV-visible spectrophotometry measurements, and vary very slowly at intermediate gold concentrations and rapidly at the extremes. Dispersions produced with a mixture of the two amino acids glycyl-L-tyrosine and L-tyrosine showed particle sizes and particle size distributions which were directly proportional to the ratio of the two L-amino acids, thus offering the possibility for control over the properties of the gold nanoparticle dispersions.[1]

References

Gold nanoparticle formation during bromoaurate reduction by amino acids. Bhargava, S.K., Booth, J.M., Agrawal, S., Coloe, P., Kar, G. Langmuir : the ACS journal of surfaces and colloids. (2005) [Pubmed]

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