Peptide-assisted synthesis of gold nanoparticles and their self-assembly

Bhattacharjee, Rama Ranjan ; Das, Apurba K. ; Haldar, Debasish ; Si, Satyabrata ; Banerjee, Arindam ; Mandal, Tarun K. (2005) Peptide-assisted synthesis of gold nanoparticles and their self-assembly Journal of Nanoscience and Nanotechnology, 5 (7). pp. 1141-1147. ISSN 1533-4880

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A novel gold nanoparticle-tripeptide (GNP-tripeptide) conjugate was prepared by peptide in-situ redox technique at ambient temperature using a newly designed tripeptide. This new tripeptide was so designed that it has a C-terminus tyrosine residue, which reduced Au+3 to Au, and the terminally located free amino group was bound to the gold nanoparticle (GNP) surface resulting in highly stable Au colloids. The average diameter of the tripeptide-stabilized GNP is 8.7±2.3 nm. Tripeptide bound gold nanoparticles formed three-dimensional assemblies in the presence of an excess of similar or disimilar tripeptides. The aggregation of GNPs results in a red shift in the surface plasmon resonance from lambda max = 527 to 556 nm. The effect of the solvent, concentration, and nature of the tripeptides on the assembly process were investigated by TEM and UV-visible spectroscopy.

Item Type:Article
Source:Copyright of this article belongs to American Scientific Publishers.
Keywords:Bionanoconjugate; Gold-Peptide; Nanoparticles; Peptide-Peptide Interaction; Self-Assembly
ID Code:99540
Deposited On:07 Nov 2016 11:10
Last Modified:07 Nov 2016 11:10

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