Preparation and characterization of DNA films using oleylamine modified Au surfaces

• Type: Article in International Scientific Journal
• Date: 2011

Authors

Joao Borges (Author) Other; Jose A Ribeiro (Author) Other; Elisa M Pereira (Author) Other; Catia A Carreira (Author) Other; Carlos M Pereira (Author) FCUP; Fernando Silva (Author) FCUP

Journal

Title: Journal of Colloid and Interface Science

Vol. 358

Pages: 626-634

ISSN: 0021-9797

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 34 Citations

Scopus - 36 Citations

Scientific classification

FOS: Natural sciences > Chemical sciences

Other information

Authenticus ID: P-002-QFY

DOI: 10.1016/j.jcis.2011.03.039

Abstract (EN): Thin films composed of oleylamine (OLA) and double-stranded deoxyribonucleic acid (dsDNA from Salmon testes) have been successfully constructed on polycrystalline Au surfaces using the electrostatic adsorption and self-assembly (SA) technique. The formation of the Au/OLA/dsDNA films was followed step-by-step by Quartz Crystal Microbalance with energy dissipation (QCM-D), Atomic Force Microscopy (AFM), and electrochemical techniques such as Cyclic Voltammetry (CV) and Electrochemical Impedance Spectroscopy (EIS). The use of these techniques allowed the characterization and the follow up of the successful construction of the OLA/dsDNA composite film. The main advantages of the proposed methodology are the simplicity of the modification procedure, the stability of the dsDNA self-assembled film, and the potential employment of the dsDNA modified gold electrodes to study the interactions of DNA with target molecules. Copyright

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 9