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Self-assembly characteristics of gold nanoparticles in the presence of arginine

L. BARBU-TUDORAN1, GH. TOMOAIA2, O. HOROVITZ3, A. MOCANU3, M. TOMOAIA-COTISEL3,*

Affiliation

  1. Babes-Bolyai University, Electron Microscopy Center, 400006 Cluj-Napoca, Romania
  2. Iuliu Hatieganu University of Medicine and Pharmacy, Orthopedic Surgery Department, 400015 Cluj-Napoca, Romania
  3. Babes-Bolyai University, Faculty of Chemistry and Chemical Engineering, 400028 Cluj-Napoca, Romania

Abstract

The interaction of colloidal gold in aqueous solutions with L-arginine solutions of different concentrations and in various mixing ratios was investigated by UV-Vis spectroscopy, transmission electron microscopy (TEM) and atomic force microscopy (AFM). It is evidenced that L-arginine mediates the formation of assemblies of gold nanoparticles, which are shown in TEM and AFM observations to have a complex structure. The TEM results for the evolution of these assemblies are used to evidence the progress in the building process of supermolecular structures. A model is proposed for the mediating action of arginine in the interparticle interactions..

Keywords

Gold nanoparticles, Self-assembly, L-Arginine.

Submitted at: Feb. 25, 2008
Accepted at: Aug. 28, 2008

Citation

L. BARBU-TUDORAN, GH. TOMOAIA, O. HOROVITZ, A. MOCANU, M. TOMOAIA-COTISEL, Self-assembly characteristics of gold nanoparticles in the presence of arginine, Journal of Optoelectronics and Advanced Materials Vol. 10, Iss. 9, pp. 2293-2297 (2008)