Titre du document / Document title

Morphological and electrical characteristics of amino acid-AuNP nanostructured two-dimensional ensembles

Auteur(s) / Author(s)

ORZA Anamaria ; OLENIC Liliana ; PRUNEANU Stela ; POGACEAN Florina ; BIRIS Alexandru S. ;

Résumé / Abstract

The interaction between amino acids (_L-cysteine, L-lysine) and gold nanoparticle layers deposited on ITO glasses was investigated. The citrate capped gold nanoparticles (AuNP) were first deposited as a thin layer onto silanized ITO and subsequently linked with an amino acid, due to strong affinity of thiol and amine groups to gold. The gold nanoparticles had an elliptical shape, with size varying between 7 and 14 nm, as indicated by TEM analysis. After deposition on ITO substrate, the nanoparticles self-assembled into large aggregates with poor contact between, as revealed by AFM. After linking L-cysteine or L-lysine to the surface of nanoparticles layer, a change in morphology occured. A better contact between the gold aggregates boundary developed, which improved the conducting properties of the nanostructured layer. The electrical resistance of the AuNPs layer, obtained from I-V measurements, was very high (2.8 x 10¹³ Ω) and slightly decreased after linking the NPs with amino acids.

Revue / Journal Title

Chemical physics    ISSN  0301-0104   CODEN CMPHC2 

Source / Source

2010, vol. 373, n^o3, pp. 295-299 [5 page(s) (article)]

Langue / Language

Anglais

Editeur / Publisher

Elsevier, Oxford, ROYAUME-UNI  (1973) (Revue)

Mots-clés d'auteur / Author Keywords

Gold nanoparticles layer

;

L-Lysine

;

L-Cysteine

;

Self-assembly

;

Localisation / Location

INIST-CNRS, Cote INIST : 16231, 35400019263426.0190