- Conference date: 29 September–1 October 2011
- Location: Cluj Napoca, Romania
In this paper we have investigated two approaches for preparation of 1D and 2D nanostructures using amino acids either for capping or as linker to a substrate. In particular we have exploited the binding ability of L-lysine, a polar amino acid which favors the self-assembling of gold nanoparticles into nanochains. The zwitterionic properties of this amino acid create a net dipole moment on the nanoparticles surface. Consequently, adjacent nanoparticles fuse through an oriented attachment mechanism and form ‘peanut-shape’ particles which in time develop into extended onedimensional nanostructures. The morphological characteristics of gold nanowires were investigated by TEM and HRTEM. Besides such 1D nanostructures, we have designed a novel 2D nanostructured assembly based on polyglutamic acid/cysteine/gold nanoparticles layer, linked to the surface of a glassy carbon electrode. Morphological and electrochemical characteristics of this assembly were investigated by Atomic Force Microscopy (AFM) and Electrochemical Impedance Spectroscopy (EIS).
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