DNA-modified electrodes - Part 3: spectroscopic characterization of DNA-modified gold electrodes
- 化学化工－已发表论文 
DNA-modified gold electrodes were characterized by scanning tunneling microscopy (STM), Raman spectroscopy, in situ UV/Vis reflection spectroscopy, X-ray photoelectron spectroscopy (XPS) and alternating current (AC) impedance. It has been found that dsDNA adsorbed firmly on gold surfaces lies strand-on in an ordered saturated monolayer, and ssDNA strands exist in a honeycomb-like form on the surfaces. The bases and phosphate groups of DNA backbone interacting with gold electrode surfaces play an important role in DNA immobilization onto gold electrode surfaces. (C) 1999 Elsevier Science B.V. All rights reserved.